* [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics
@ 2020-12-23 13:03 Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 1/6] perf stat: Add AGGR_IIO_STACK mode Alexander Antonov
` (5 more replies)
0 siblings, 6 replies; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
The previous version can be found at:
v1: https://lkml.kernel.org/r/20201210090340.14358-1-alexander.antonov@linux.intel.com
Changes in this revision are:
v1 -> v2:
1. Using 'perf iiostat' subcommand instead of 'perf stat --iiostat':
- Added perf-iiostat.sh script to use short command
- Updated manual pages to get help for 'perf iiostat'
- Added 'perf-iiostat' to perf's gitignore file
Mode is intended to provide four I/O performance metrics in MB per each
IIO stack:
- Inbound Read: I/O devices below IIO stack read from the host memory
- Inbound Write: I/O devices below IIO stack write to the host memory
- Outbound Read: CPU reads from I/O devices below IIO stack
- Outbound Write: CPU writes to I/O devices below IIO stack
Each metric requiries only one IIO event which increments at every 4B
transfer in corresponding direction. The formulas to compute metrics
are generic:
#EventCount * 4B / (1024 * 1024)
Note: iiostat introduces new perf data aggregation mode - per I/O stack
hence -e and -M options are not supported.
Usage examples:
1. List all IIO stacks (example for 2-S platform):
$ perf iiostat show
S0-uncore_iio_0<0000:00>
S1-uncore_iio_0<0000:80>
S0-uncore_iio_1<0000:17>
S1-uncore_iio_1<0000:85>
S0-uncore_iio_2<0000:3a>
S1-uncore_iio_2<0000:ae>
S0-uncore_iio_3<0000:5d>
S1-uncore_iio_3<0000:d7>
2. Collect metrics for all I/O stacks:
$ perf iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
357708+0 records in
357707+0 records out
375083606016 bytes (375 GB, 349 GiB) copied, 215.974 s, 1.7 GB/s
Performance counter stats for 'system wide':
port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
0000:00 1 0 2 3
0000:80 0 0 0 0
0000:17 352552 43 0 21
0000:85 0 0 0 0
0000:3a 3 0 0 0
0000:ae 0 0 0 0
0000:5d 0 0 0 0
0000:d7 0 0 0 0
3. Collect metrics for comma separated list of I/O stacks:
$ perf iiostat 0000:17,0:3a -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
357708+0 records in
357707+0 records out
375083606016 bytes (375 GB, 349 GiB) copied, 197.08 s, 1.9 GB/s
Performance counter stats for 'system wide':
port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
0000:17 358559 44 0 22
0000:3a 3 2 0 0
197.081983474 seconds time elapsed
Alexander Antonov (6):
perf stat: Add AGGR_IIO_STACK mode
perf evsel: Introduce an observed performance device
perf stat: Basic support for iiostat in perf
perf stat: Helper functions for IIO stacks list in iiostat mode
perf stat: Enable iiostat mode for x86 platforms
perf: Update .gitignore file
tools/perf/.gitignore | 1 +
tools/perf/Documentation/perf-iiostat.txt | 89 ++++
tools/perf/Makefile.perf | 5 +-
tools/perf/arch/x86/util/Build | 1 +
tools/perf/arch/x86/util/iiostat.c | 462 ++++++++++++++++++
tools/perf/builtin-stat.c | 40 +-
tools/perf/command-list.txt | 1 +
tools/perf/perf-iiostat.sh | 12 +
tools/perf/util/evsel.h | 1 +
tools/perf/util/iiostat.h | 33 ++
.../scripting-engines/trace-event-python.c | 2 +-
tools/perf/util/stat-display.c | 51 +-
tools/perf/util/stat-shadow.c | 11 +-
tools/perf/util/stat.c | 3 +-
tools/perf/util/stat.h | 2 +
15 files changed, 704 insertions(+), 10 deletions(-)
create mode 100644 tools/perf/Documentation/perf-iiostat.txt
create mode 100644 tools/perf/arch/x86/util/iiostat.c
create mode 100644 tools/perf/perf-iiostat.sh
create mode 100644 tools/perf/util/iiostat.h
base-commit: 644bf4b0f7acde641d3db200b4db66977e96c3bd
--
2.19.1
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH v2 1/6] perf stat: Add AGGR_IIO_STACK mode
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 2/6] perf evsel: Introduce an observed performance device Alexander Antonov
` (4 subsequent siblings)
5 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
Adding AGGR_IIO_STACK mode to be able to distinguish aggr_mode
for IIO stacks in following patches.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/builtin-stat.c | 7 +++++--
.../util/scripting-engines/trace-event-python.c | 2 +-
tools/perf/util/stat-display.c | 13 +++++++++++--
tools/perf/util/stat.c | 3 ++-
tools/perf/util/stat.h | 1 +
5 files changed, 20 insertions(+), 6 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index f15b2f8aa14d..72f9d0aa3f96 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -913,7 +913,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
init_stats(&walltime_nsecs_stats);
update_stats(&walltime_nsecs_stats, t1 - t0);
- if (stat_config.aggr_mode == AGGR_GLOBAL)
+ if (stat_config.aggr_mode == AGGR_GLOBAL || stat_config.aggr_mode == AGGR_IIO_STACK)
perf_evlist__save_aggr_prev_raw_counts(evsel_list);
perf_evlist__copy_prev_raw_counts(evsel_list);
@@ -1309,6 +1309,7 @@ static int perf_stat_init_aggr_mode(void)
break;
case AGGR_GLOBAL:
case AGGR_THREAD:
+ case AGGR_IIO_STACK:
case AGGR_UNSET:
default:
break;
@@ -1499,6 +1500,7 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
case AGGR_NONE:
case AGGR_GLOBAL:
case AGGR_THREAD:
+ case AGGR_IIO_STACK:
case AGGR_UNSET:
default:
break;
@@ -2216,7 +2218,8 @@ int cmd_stat(int argc, const char **argv)
* --per-thread is aggregated per thread, we dont mix it with cpu mode
*/
if (((stat_config.aggr_mode != AGGR_GLOBAL &&
- stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
+ stat_config.aggr_mode != AGGR_THREAD &&
+ stat_config.aggr_mode != AGGR_IIO_STACK) || nr_cgroups) &&
!target__has_cpu(&target)) {
fprintf(stderr, "both cgroup and no-aggregation "
"modes only available in system-wide mode\n");
diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
index c83c2c6564e0..e8b472faeae4 100644
--- a/tools/perf/util/scripting-engines/trace-event-python.c
+++ b/tools/perf/util/scripting-engines/trace-event-python.c
@@ -1401,7 +1401,7 @@ static void python_process_stat(struct perf_stat_config *config,
struct perf_cpu_map *cpus = counter->core.cpus;
int cpu, thread;
- if (config->aggr_mode == AGGR_GLOBAL) {
+ if (config->aggr_mode == AGGR_GLOBAL || config->aggr_mode == AGGR_IIO_STACK) {
process_stat(counter, -1, -1, tstamp,
&counter->counts->aggr);
return;
diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index 4b57c0c07632..3bfcdb80443a 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -133,6 +133,7 @@ static void aggr_printout(struct perf_stat_config *config,
config->csv_sep);
break;
case AGGR_GLOBAL:
+ case AGGR_IIO_STACK:
case AGGR_UNSET:
default:
break;
@@ -330,7 +331,7 @@ static int first_shadow_cpu(struct perf_stat_config *config,
if (config->aggr_mode == AGGR_NONE)
return id;
- if (config->aggr_mode == AGGR_GLOBAL)
+ if (config->aggr_mode == AGGR_GLOBAL || config->aggr_mode == AGGR_IIO_STACK)
return 0;
for (i = 0; i < evsel__nr_cpus(evsel); i++) {
@@ -424,6 +425,7 @@ static void printout(struct perf_stat_config *config, int id, int nr,
if (config->csv_output && !config->metric_only) {
static int aggr_fields[] = {
[AGGR_GLOBAL] = 0,
+ [AGGR_IIO_STACK] = 0,
[AGGR_THREAD] = 1,
[AGGR_NONE] = 1,
[AGGR_SOCKET] = 2,
@@ -906,6 +908,7 @@ static int aggr_header_lens[] = {
[AGGR_NONE] = 6,
[AGGR_THREAD] = 24,
[AGGR_GLOBAL] = 0,
+ [AGGR_IIO_STACK] = 0,
};
static const char *aggr_header_csv[] = {
@@ -914,7 +917,8 @@ static const char *aggr_header_csv[] = {
[AGGR_SOCKET] = "socket,cpus",
[AGGR_NONE] = "cpu,",
[AGGR_THREAD] = "comm-pid,",
- [AGGR_GLOBAL] = ""
+ [AGGR_GLOBAL] = "",
+ [AGGR_IIO_STACK] = "port,"
};
static void print_metric_headers(struct perf_stat_config *config,
@@ -1001,6 +1005,9 @@ static void print_interval(struct perf_stat_config *config,
if (!metric_only)
fprintf(output, " counts %*s events\n", unit_width, "unit");
break;
+ case AGGR_IIO_STACK:
+ fprintf(output, "# time port ");
+ break;
case AGGR_GLOBAL:
default:
fprintf(output, "# time");
@@ -1246,6 +1253,8 @@ perf_evlist__print_counters(struct evlist *evlist,
}
}
break;
+ case AGGR_IIO_STACK:
+ break;
case AGGR_UNSET:
default:
break;
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index bd0decd6d753..6a655f909587 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -363,6 +363,7 @@ process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
}
break;
case AGGR_GLOBAL:
+ case AGGR_IIO_STACK:
aggr->val += count->val;
aggr->ena += count->ena;
aggr->run += count->run;
@@ -424,7 +425,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
if (ret)
return ret;
- if (config->aggr_mode != AGGR_GLOBAL)
+ if (config->aggr_mode != AGGR_GLOBAL && config->aggr_mode != AGGR_IIO_STACK)
return 0;
if (!counter->snapshot)
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 05adf8165025..d053ebd44ae3 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -50,6 +50,7 @@ enum aggr_mode {
AGGR_DIE,
AGGR_CORE,
AGGR_THREAD,
+ AGGR_IIO_STACK,
AGGR_UNSET,
AGGR_NODE,
};
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH v2 2/6] perf evsel: Introduce an observed performance device
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 1/6] perf stat: Add AGGR_IIO_STACK mode Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
2021-01-06 8:44 ` Namhyung Kim
2020-12-23 13:03 ` [PATCH v2 3/6] perf stat: Basic support for iiostat in perf Alexander Antonov
` (3 subsequent siblings)
5 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
Adding evsel::perf_device void pointer.
For performance monitoring purposes, an evsel can have a related device.
These changes allow to attribute, for example, I/O performance metrics
to IIO stack.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/util/evsel.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 79a860d8e3ee..c346920f477a 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -127,6 +127,7 @@ struct evsel {
* See also evsel__has_callchain().
*/
__u64 synth_sample_type;
+ void *perf_device;
};
struct perf_missing_features {
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH v2 3/6] perf stat: Basic support for iiostat in perf
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 1/6] perf stat: Add AGGR_IIO_STACK mode Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 2/6] perf evsel: Introduce an observed performance device Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
2021-01-06 8:56 ` Namhyung Kim
2020-12-23 13:03 ` [PATCH v2 4/6] perf stat: Helper functions for IIO stacks list in iiostat mode Alexander Antonov
` (2 subsequent siblings)
5 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
Add basic flow for a new iiostat mode in perf. Mode is intended to
provide four I/O performance metrics per each IIO stack: Inbound Read,
Inbound Write, Outbound Read, Outbound Write.
The actual code to compute the metrics and attribute it to
evsel::perf_device is in follow-on patches.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/builtin-stat.c | 33 ++++++++++++++++++++++++++++-
tools/perf/util/iiostat.h | 33 +++++++++++++++++++++++++++++
tools/perf/util/stat-display.c | 38 +++++++++++++++++++++++++++++++++-
tools/perf/util/stat-shadow.c | 11 +++++++++-
tools/perf/util/stat.h | 1 +
5 files changed, 113 insertions(+), 3 deletions(-)
create mode 100644 tools/perf/util/iiostat.h
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 72f9d0aa3f96..14c3da136927 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -67,6 +67,7 @@
#include "util/top.h"
#include "util/affinity.h"
#include "util/pfm.h"
+#include "util/iiostat.h"
#include "asm/bug.h"
#include <linux/time64.h>
@@ -198,7 +199,8 @@ static struct perf_stat_config stat_config = {
.walltime_nsecs_stats = &walltime_nsecs_stats,
.big_num = true,
.ctl_fd = -1,
- .ctl_fd_ack = -1
+ .ctl_fd_ack = -1,
+ .iiostat_run = false,
};
static bool cpus_map_matched(struct evsel *a, struct evsel *b)
@@ -1073,6 +1075,14 @@ static int parse_stat_cgroups(const struct option *opt,
return parse_cgroups(opt, str, unset);
}
+__weak int iiostat_parse(const struct option *opt __maybe_unused,
+ const char *str __maybe_unused,
+ int unset __maybe_unused)
+{
+ pr_err("iiostat mode is not supported\n");
+ return -1;
+}
+
static struct option stat_options[] = {
OPT_BOOLEAN('T', "transaction", &transaction_run,
"hardware transaction statistics"),
@@ -1185,6 +1195,8 @@ static struct option stat_options[] = {
"\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
"\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
parse_control_option),
+ OPT_CALLBACK_OPTARG(0, "iiostat", &evsel_list, &stat_config, "root port",
+ "measure PCIe metrics per IIO stack", iiostat_parse),
OPT_END()
};
@@ -1509,6 +1521,12 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
return 0;
}
+__weak int iiostat_show_root_ports(struct evlist *evlist __maybe_unused,
+ struct perf_stat_config *config __maybe_unused)
+{
+ return 0;
+}
+
/*
* Add default attributes, if there were no attributes specified or
* if -d/--detailed, -d -d or -d -d -d is used:
@@ -2054,6 +2072,10 @@ static void setup_system_wide(int forks)
}
}
+__weak void iiostat_delete_root_ports(struct evlist *evlist __maybe_unused)
+{
+}
+
int cmd_stat(int argc, const char **argv)
{
const char * const stat_usage[] = {
@@ -2230,6 +2252,12 @@ int cmd_stat(int argc, const char **argv)
goto out;
}
+ if (stat_config.iiostat_run) {
+ status = iiostat_show_root_ports(evsel_list, &stat_config);
+ if (status || !stat_config.iiostat_run)
+ goto out;
+ }
+
if (add_default_attributes())
goto out;
@@ -2406,6 +2434,9 @@ int cmd_stat(int argc, const char **argv)
perf_stat__exit_aggr_mode();
perf_evlist__free_stats(evsel_list);
out:
+ if (stat_config.iiostat_run)
+ iiostat_delete_root_ports(evsel_list);
+
zfree(&stat_config.walltime_run);
if (smi_cost && smi_reset)
diff --git a/tools/perf/util/iiostat.h b/tools/perf/util/iiostat.h
new file mode 100644
index 000000000000..8d4226df9975
--- /dev/null
+++ b/tools/perf/util/iiostat.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * perf iiostat
+ *
+ * Copyright (C) 2020, Intel Corporation
+ *
+ * Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
+ */
+
+#ifndef _IIOSTAT_H
+#define _IIOSTAT_H
+
+#include <subcmd/parse-options.h>
+#include "util/stat.h"
+#include "util/parse-events.h"
+#include "util/evlist.h"
+
+struct option;
+struct perf_stat_config;
+struct evlist;
+struct timespec;
+
+int iiostat_parse(const struct option *opt, const char *str,
+ int unset __maybe_unused);
+void iiostat_prefix(struct perf_stat_config *config, struct evlist *evlist,
+ char *prefix, struct timespec *ts);
+void iiostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
+ struct perf_stat_output_ctx *out);
+int iiostat_show_root_ports(struct evlist *evlist,
+ struct perf_stat_config *config);
+void iiostat_delete_root_ports(struct evlist *evlist);
+
+#endif /* _IIOSTAT_H */
diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index 3bfcdb80443a..9eb8484e8b90 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -17,6 +17,7 @@
#include "cgroup.h"
#include <api/fs/fs.h>
#include "util.h"
+#include "iiostat.h"
#define CNTR_NOT_SUPPORTED "<not supported>"
#define CNTR_NOT_COUNTED "<not counted>"
@@ -310,6 +311,12 @@ static void print_metric_header(struct perf_stat_config *config,
struct outstate *os = ctx;
char tbuf[1024];
+ /* In case of iiostat, print metric header for first perf_device only */
+ if (os->evsel->perf_device && os->evsel->evlist->selected->perf_device &&
+ config->iiostat_run &&
+ os->evsel->perf_device != os->evsel->evlist->selected->perf_device)
+ return;
+
if (!valid_only_metric(unit))
return;
unit = fixunit(tbuf, os->evsel, unit);
@@ -942,6 +949,8 @@ static void print_metric_headers(struct perf_stat_config *config,
fputs("time,", config->output);
fputs(aggr_header_csv[config->aggr_mode], config->output);
}
+ if (config->iiostat_run && !config->interval && !config->csv_output)
+ fprintf(config->output, " port ");
/* Print metrics headers only */
evlist__for_each_entry(evlist, counter) {
@@ -959,6 +968,13 @@ static void print_metric_headers(struct perf_stat_config *config,
fputc('\n', config->output);
}
+__weak void iiostat_prefix(struct perf_stat_config *config __maybe_unused,
+ struct evlist *evlist __maybe_unused,
+ char *prefix __maybe_unused,
+ struct timespec *ts __maybe_unused)
+{
+}
+
static void print_interval(struct perf_stat_config *config,
struct evlist *evlist,
char *prefix, struct timespec *ts)
@@ -971,7 +987,8 @@ static void print_interval(struct perf_stat_config *config,
if (config->interval_clear)
puts(CONSOLE_CLEAR);
- sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, config->csv_sep);
+ if (!config->iiostat_run)
+ sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, config->csv_sep);
if ((num_print_interval == 0 && !config->csv_output) || config->interval_clear) {
switch (config->aggr_mode) {
@@ -1205,6 +1222,10 @@ perf_evlist__print_counters(struct evlist *evlist,
int interval = config->interval;
struct evsel *counter;
char buf[64], *prefix = NULL;
+ void *device = NULL;
+
+ if (config->iiostat_run)
+ evlist->selected = evlist__first(evlist);
if (interval)
print_interval(config, evlist, prefix = buf, ts);
@@ -1254,6 +1275,21 @@ perf_evlist__print_counters(struct evlist *evlist,
}
break;
case AGGR_IIO_STACK:
+ counter = evlist__first(evlist);
+ perf_evlist__set_selected(evlist, counter);
+ iiostat_prefix(config, evlist, prefix = buf, ts);
+ fprintf(config->output, "%s", prefix);
+ evlist__for_each_entry(evlist, counter) {
+ device = evlist->selected->perf_device;
+ if (device && device != counter->perf_device) {
+ perf_evlist__set_selected(evlist, counter);
+ iiostat_prefix(config, evlist, prefix, ts);
+ fprintf(config->output, "\n%s", prefix);
+ }
+ print_counter_aggr(config, counter, prefix);
+ if ((counter->idx + 1) == evlist->core.nr_entries)
+ fputc('\n', config->output);
+ }
break;
case AGGR_UNSET:
default:
diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index 901265127e36..c5851ceb4c6b 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -9,6 +9,7 @@
#include "expr.h"
#include "metricgroup.h"
#include <linux/zalloc.h>
+#include "iiostat.h"
/*
* AGGR_GLOBAL: Use CPU 0
@@ -919,6 +920,12 @@ double test_generic_metric(struct metric_expr *mexp, int cpu, struct runtime_sta
return ratio;
}
+__weak void iiostat_print_metric(struct perf_stat_config *config __maybe_unused,
+ struct evsel *evsel __maybe_unused,
+ struct perf_stat_output_ctx *out __maybe_unused)
+{
+}
+
void perf_stat__print_shadow_stats(struct perf_stat_config *config,
struct evsel *evsel,
double avg, int cpu,
@@ -934,7 +941,9 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
struct metric_event *me;
int num = 1;
- if (evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
+ if (config->iiostat_run) {
+ iiostat_print_metric(config, evsel, out);
+ } else if (evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
total = runtime_stat_avg(st, STAT_CYCLES, ctx, cpu);
if (total) {
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index d053ebd44ae3..a072dfe3dbbf 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -118,6 +118,7 @@ struct perf_stat_config {
bool walltime_run_table;
bool all_kernel;
bool all_user;
+ bool iiostat_run;
bool percore_show_thread;
bool summary;
bool metric_no_group;
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH v2 4/6] perf stat: Helper functions for IIO stacks list in iiostat mode
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
` (2 preceding siblings ...)
2020-12-23 13:03 ` [PATCH v2 3/6] perf stat: Basic support for iiostat in perf Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 6/6] perf: Update .gitignore file Alexander Antonov
5 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
Introduce helper functions to control IIO stacks list.
These helpers will be used in the follow-up patch.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/arch/x86/util/iiostat.c | 125 +++++++++++++++++++++++++++++
1 file changed, 125 insertions(+)
create mode 100644 tools/perf/arch/x86/util/iiostat.c
diff --git a/tools/perf/arch/x86/util/iiostat.c b/tools/perf/arch/x86/util/iiostat.c
new file mode 100644
index 000000000000..98b9707b4827
--- /dev/null
+++ b/tools/perf/arch/x86/util/iiostat.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * perf iiostat
+ *
+ * Copyright (C) 2020, Intel Corporation
+ *
+ * Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
+ */
+
+#include <api/fs/fs.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <regex.h>
+#include "util/cpumap.h"
+#include "util/debug.h"
+#include "util/iiostat.h"
+#include "util/counts.h"
+#include "path.h"
+
+struct iio_root_port {
+ u32 domain;
+ u8 bus;
+ u8 die;
+ u8 pmu_idx;
+ int idx;
+};
+
+struct iio_root_ports_list {
+ struct iio_root_port **rps;
+ int nr_entries;
+};
+
+static void iio_root_port_show(FILE *output, const struct iio_root_port * const rp)
+{
+ if (output && rp)
+ fprintf(output, "S%d-uncore_iio_%d<%04x:%02x>\n",
+ rp->die, rp->pmu_idx, rp->domain, rp->bus);
+}
+
+static struct iio_root_port *iio_root_port_new(u32 domain, u8 bus, u8 die, u8 pmu_idx)
+{
+ struct iio_root_port *p = calloc(1, sizeof(*p));
+
+ if (p) {
+ p->domain = domain;
+ p->bus = bus;
+ p->die = die;
+ p->pmu_idx = pmu_idx;
+ }
+ return p;
+}
+
+static struct iio_root_ports_list *iio_root_ports_list_new(void)
+{
+ struct iio_root_ports_list *list = calloc(1, sizeof(*list));
+
+ if (list) {
+ list->rps = calloc(1, sizeof(struct iio_root_port *));
+ if (!list->rps) {
+ free(list);
+ list = NULL;
+ }
+ }
+
+ return list;
+}
+
+static void iio_root_ports_list_free(struct iio_root_ports_list *list)
+{
+ int idx;
+
+ if (list) {
+ for (idx = 0; idx < list->nr_entries; idx++)
+ free(list->rps[idx]);
+ free(list->rps);
+ free(list);
+ }
+}
+
+static
+struct iio_root_port *iio_root_port_find_by_notation(const struct iio_root_ports_list * const list,
+ u32 domain, u8 bus)
+{
+ int idx;
+ struct iio_root_port *rp;
+
+ if (list) {
+ for (idx = 0; idx < list->nr_entries; idx++) {
+ rp = list->rps[idx];
+ if (rp && rp->domain == domain && rp->bus == bus)
+ return rp;
+ }
+ }
+ return NULL;
+}
+
+static int iio_root_ports_list_insert(struct iio_root_ports_list *list,
+ struct iio_root_port * const rp)
+{
+ struct iio_root_port **tmp_buf;
+
+ if (list && rp) {
+ rp->idx = list->nr_entries++;
+ /* One more for NULL.*/
+ tmp_buf = realloc(list->rps, (list->nr_entries + 1) * sizeof(*list->rps));
+ if (!tmp_buf) {
+ pr_err("Failed to realloc memory\n");
+ return -ENOMEM;
+ }
+ tmp_buf[rp->idx] = rp;
+ tmp_buf[list->nr_entries] = NULL;
+ list->rps = tmp_buf;
+ }
+ return 0;
+}
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
` (3 preceding siblings ...)
2020-12-23 13:03 ` [PATCH v2 4/6] perf stat: Helper functions for IIO stacks list in iiostat mode Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
2021-01-06 9:02 ` Namhyung Kim
2020-12-23 13:03 ` [PATCH v2 6/6] perf: Update .gitignore file Alexander Antonov
5 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
This functionality is based on recently introduced sysfs attributes
for Intel® Xeon® Scalable processor family (code name Skylake-SP):
Commit bb42b3d39781 ("perf/x86/intel/uncore: Expose an Uncore unit to
IIO PMON mapping")
Mode is intended to provide four I/O performance metrics in MB per each
IIO stack:
- Inbound Read: I/O devices below IIO stack read from the host memory
- Inbound Write: I/O devices below IIO stack write to the host memory
- Outbound Read: CPU reads from I/O devices below IIO stack
- Outbound Write: CPU writes to I/O devices below IIO stack
Each metric requiries only one IIO event which increments at every 4B
transfer in corresponding direction. The formulas to compute metrics
are generic:
#EventCount * 4B / (1024 * 1024)
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/Documentation/perf-iiostat.txt | 89 ++++++
tools/perf/Makefile.perf | 5 +-
tools/perf/arch/x86/util/Build | 1 +
tools/perf/arch/x86/util/iiostat.c | 337 ++++++++++++++++++++++
tools/perf/command-list.txt | 1 +
tools/perf/perf-iiostat.sh | 12 +
6 files changed, 444 insertions(+), 1 deletion(-)
create mode 100644 tools/perf/Documentation/perf-iiostat.txt
create mode 100644 tools/perf/perf-iiostat.sh
diff --git a/tools/perf/Documentation/perf-iiostat.txt b/tools/perf/Documentation/perf-iiostat.txt
new file mode 100644
index 000000000000..38b5697b0d85
--- /dev/null
+++ b/tools/perf/Documentation/perf-iiostat.txt
@@ -0,0 +1,89 @@
+perf-iiostat(1)
+===============
+
+NAME
+----
+perf-iiostat - Show I/O performance metrics
+
+SYNOPSIS
+--------
+[verse]
+'perf iiostat' show
+'perf iiostat' <ports> -- <command> [<options>]
+
+DESCRIPTION
+-----------
+Mode is intended to provide four I/O performance metrics per each IIO
+stack (PCIe root port):
+
+- Inbound Read - I/O devices below IIO stack read from the host memory, in MB
+
+- Inbound Write - I/O devices below IIO stack write to the host memory, in MB
+
+- Outbound Read - CPU reads from I/O devices below IIO stack, in MB
+
+- Outbound Write - CPU writes to I/O devices below IIO stack, in MB
+
+OPTIONS
+-------
+<command>...::
+ Any command you can specify in a shell.
+
+show::
+ List all IIO stacks.
+
+<ports>::
+ Select the root ports for monitoring. Comma-separated list is supported.
+
+EXAMPLES
+--------
+
+1. List all IIO stacks (example for 2-S platform):
+
+ $ perf iiostat show
+ S0-uncore_iio_0<0000:00>
+ S1-uncore_iio_0<0000:80>
+ S0-uncore_iio_1<0000:17>
+ S1-uncore_iio_1<0000:85>
+ S0-uncore_iio_2<0000:3a>
+ S1-uncore_iio_2<0000:ae>
+ S0-uncore_iio_3<0000:5d>
+ S1-uncore_iio_3<0000:d7>
+
+2. Collect metrics for all I/O stacks:
+
+ $ perf iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
+ 357708+0 records in
+ 357707+0 records out
+ 375083606016 bytes (375 GB, 349 GiB) copied, 215.974 s, 1.7 GB/s
+
+ Performance counter stats for 'system wide':
+
+ port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
+ 0000:00 1 0 2 3
+ 0000:80 0 0 0 0
+ 0000:17 352552 43 0 21
+ 0000:85 0 0 0 0
+ 0000:3a 3 0 0 0
+ 0000:ae 0 0 0 0
+ 0000:5d 0 0 0 0
+ 0000:d7 0 0 0 0
+
+3. Collect metrics for comma-separated list of I/O stacks:
+
+ $ perf iiostat 0000:17,0:3a -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
+ 357708+0 records in
+ 357707+0 records out
+ 375083606016 bytes (375 GB, 349 GiB) copied, 197.08 s, 1.9 GB/s
+
+ Performance counter stats for 'system wide':
+
+ port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
+ 0000:17 358559 44 0 22
+ 0000:3a 3 2 0 0
+
+ 197.081983474 seconds time elapsed
+
+SEE ALSO
+--------
+linkperf:perf-stat[1]
\ No newline at end of file
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 7ce3f2e8b9c7..c16c14a304a9 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -280,6 +280,7 @@ SCRIPT_SH =
SCRIPT_SH += perf-archive.sh
SCRIPT_SH += perf-with-kcore.sh
+SCRIPT_SH += perf-iiostat.sh
grep-libs = $(filter -l%,$(1))
strip-libs = $(filter-out -l%,$(1))
@@ -944,6 +945,8 @@ endif
$(INSTALL) $(OUTPUT)perf-archive -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
$(call QUIET_INSTALL, perf-with-kcore) \
$(INSTALL) $(OUTPUT)perf-with-kcore -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
+ $(call QUIET_INSTALL, perf-iiostat) \
+ $(INSTALL) $(OUTPUT)perf-iiostat -t '$(DESTDIR_SQ)$(perfexec_instdir_SQ)'
ifndef NO_LIBAUDIT
$(call QUIET_INSTALL, strace/groups) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(STRACE_GROUPS_INSTDIR_SQ)'; \
@@ -1009,7 +1012,7 @@ python-clean:
$(python-clean)
clean:: $(LIBTRACEEVENT)-clean $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBPERF)-clean config-clean fixdep-clean python-clean
- $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(LANG_BINDINGS)
+ $(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive $(OUTPUT)perf-with-kcore $(OUTPUT)perf-iiostat $(LANG_BINDINGS)
$(Q)find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
$(Q)$(RM) $(OUTPUT).config-detected
$(call QUIET_CLEAN, core-progs) $(RM) $(ALL_PROGRAMS) perf perf-read-vdso32 perf-read-vdsox32 $(OUTPUT)pmu-events/jevents $(OUTPUT)$(LIBJVMTI).so
diff --git a/tools/perf/arch/x86/util/Build b/tools/perf/arch/x86/util/Build
index 347c39b960eb..6fa275d3d897 100644
--- a/tools/perf/arch/x86/util/Build
+++ b/tools/perf/arch/x86/util/Build
@@ -6,6 +6,7 @@ perf-y += perf_regs.o
perf-y += topdown.o
perf-y += machine.o
perf-y += event.o
+perf-y += iiostat.o
perf-$(CONFIG_DWARF) += dwarf-regs.o
perf-$(CONFIG_BPF_PROLOGUE) += dwarf-regs.o
diff --git a/tools/perf/arch/x86/util/iiostat.c b/tools/perf/arch/x86/util/iiostat.c
index 98b9707b4827..de8690dbb8b0 100644
--- a/tools/perf/arch/x86/util/iiostat.c
+++ b/tools/perf/arch/x86/util/iiostat.c
@@ -27,6 +27,44 @@
#include "util/counts.h"
#include "path.h"
+#ifndef MAX_PATH
+#define MAX_PATH 1024
+#endif
+
+#define UNCORE_IIO_PMU_PATH "devices/uncore_iio_%d"
+#define SYSFS_UNCORE_PMU_PATH "%s/"UNCORE_IIO_PMU_PATH
+#define PLATFORM_MAPPING_PATH UNCORE_IIO_PMU_PATH"/die%d"
+
+enum iiostat_mode_t {
+ IIOSTAT_NONE = -1,
+ IIOSTAT_RUN = 0,
+ IIOSTAT_SHOW = 1
+};
+
+static enum iiostat_mode_t iiostat_mode = IIOSTAT_NONE;
+
+/*
+ * Each metric requiries only one IIO event which increments at every 4B transfer
+ * in corresponding direction. The formulas to compute metrics are generic:
+ * #EventCount * 4B / (1024 * 1024)
+ */
+static const char * const iiostat_metrics[] = {
+ "Inbound Read(MB)",
+ "Inbound Write(MB)",
+ "Outbound Read(MB)",
+ "Outbound Write(MB)",
+};
+
+static inline int iiostat_metrics_count(void)
+{
+ return sizeof(iiostat_metrics) / sizeof(char *);
+}
+
+static const char *iiostat_metric_by_idx(int idx)
+{
+ return *(iiostat_metrics + idx % iiostat_metrics_count());
+}
+
struct iio_root_port {
u32 domain;
u8 bus;
@@ -123,3 +161,302 @@ static int iio_root_ports_list_insert(struct iio_root_ports_list *list,
}
return 0;
}
+
+static int uncore_pmu_iio_platform_mapping(u8 pmu_idx, struct iio_root_ports_list * const list)
+{
+ char *buf;
+ char path[MAX_PATH];
+ u32 domain;
+ u8 bus;
+ struct iio_root_port *rp;
+ size_t size;
+ int ret;
+
+ for (int die = 0; die < cpu__max_node(); die++) {
+ scnprintf(path, MAX_PATH, PLATFORM_MAPPING_PATH, pmu_idx, die);
+ if (sysfs__read_str(path, &buf, &size) < 0) {
+ if (pmu_idx)
+ goto out;
+ pr_err("Mode iiostat is not supported\n");
+ return -1;
+ }
+ ret = sscanf(buf, "%04x:%02hhx", &domain, &bus);
+ free(buf);
+ if (ret != 2) {
+ pr_err("Invalid mapping data: iio_%d; die%d\n", pmu_idx, die);
+ return -1;
+ }
+ rp = iio_root_port_new(domain, bus, die, pmu_idx);
+ if (!rp || iio_root_ports_list_insert(list, rp)) {
+ free(rp);
+ return -ENOMEM;
+ }
+ }
+out:
+ return 0;
+}
+
+static u8 iio_pmu_count(void)
+{
+ u8 pmu_idx = 0;
+ char path[MAX_PATH];
+ const char *sysfs = sysfs__mountpoint();
+
+ if (sysfs) {
+ for (;; pmu_idx++) {
+ snprintf(path, sizeof(path), SYSFS_UNCORE_PMU_PATH,
+ sysfs, pmu_idx);
+ if (access(path, F_OK) != 0)
+ break;
+ }
+ }
+ return pmu_idx;
+}
+
+static int iio_root_ports_scan(struct iio_root_ports_list **list)
+{
+ int ret = -ENOMEM;
+ struct iio_root_ports_list *tmp_list;
+ u8 pmu_count = iio_pmu_count();
+
+ if (!pmu_count) {
+ pr_err("Unsupported uncore pmu configuration\n");
+ return -1;
+ }
+
+ tmp_list = iio_root_ports_list_new();
+ if (!tmp_list)
+ goto err;
+
+ for (u8 pmu_idx = 0; pmu_idx < pmu_count; pmu_idx++) {
+ ret = uncore_pmu_iio_platform_mapping(pmu_idx, tmp_list);
+ if (ret)
+ break;
+ }
+err:
+ if (!ret)
+ *list = tmp_list;
+ else
+ iio_root_ports_list_free(tmp_list);
+
+ return ret;
+}
+
+static int iio_root_port_parse_str(u32 *domain, u8 *bus, char *str)
+{
+ int ret;
+ regex_t regex;
+ /*
+ * Expected format domain:bus:
+ * Valid domain range [0:ffff]
+ * Valid bus range [0:ff]
+ * Example: 0000:af, 0:3d, 01:7
+ */
+ regcomp(®ex, "^([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})$", REG_EXTENDED);
+ ret = regexec(®ex, str, 0, NULL, 0);
+ if (ret || sscanf(str, "%08x:%02hhx", domain, bus) != 2)
+ pr_warning("Unrecognized root port format: %s\n"
+ "Please use the following format:\n"
+ "\t [domain]:[bus]\n"
+ "\t for example: 0000:3d\n", str);
+
+ regfree(®ex);
+ return ret;
+}
+
+static int iio_root_ports_list_filter(struct iio_root_ports_list **list,
+ const char *filter)
+{
+ char *tok, *tmp, *filter_copy = NULL;
+ struct iio_root_port *rp;
+ u32 domain;
+ u8 bus;
+ int ret = -ENOMEM;
+ struct iio_root_ports_list *tmp_list = iio_root_ports_list_new();
+
+ if (!tmp_list)
+ goto err;
+
+ filter_copy = strdup(filter);
+ if (!filter_copy)
+ goto err;
+
+ for (tok = strtok_r(filter_copy, ",", &tmp); tok; tok = strtok_r(NULL, ",", &tmp)) {
+ if (!iio_root_port_parse_str(&domain, &bus, tok)) {
+ rp = iio_root_port_find_by_notation(*list, domain, bus);
+ if (rp) {
+ (*list)->rps[rp->idx] = NULL;
+ ret = iio_root_ports_list_insert(tmp_list, rp);
+ if (ret) {
+ free(rp);
+ goto err;
+ }
+ } else if (!iio_root_port_find_by_notation(tmp_list, domain, bus))
+ pr_warning("Root port %04x:%02x were not found\n", domain, bus);
+ }
+ }
+
+ if (tmp_list->nr_entries == 0) {
+ pr_err("Requested root ports were not found\n");
+ ret = -EINVAL;
+ }
+err:
+ iio_root_ports_list_free(*list);
+ if (ret)
+ iio_root_ports_list_free(tmp_list);
+ else
+ *list = tmp_list;
+
+ free(filter_copy);
+ return ret;
+}
+
+static int iiostat_event_group(struct evlist *evl, struct iio_root_ports_list *list)
+{
+ int ret;
+ struct iio_root_port **rp;
+ const char *iiostat_cmd_template =
+ "{uncore_iio_%x/event=0x83,umask=0x04,ch_mask=0xF,fc_mask=0x07/,\
+ uncore_iio_%x/event=0x83,umask=0x01,ch_mask=0xF,fc_mask=0x07/,\
+ uncore_iio_%x/event=0xc0,umask=0x04,ch_mask=0xF,fc_mask=0x07/,\
+ uncore_iio_%x/event=0xc0,umask=0x01,ch_mask=0xF,fc_mask=0x07/}";
+ const int len_template = strlen(iiostat_cmd_template) + 1;
+ struct evsel *evsel = NULL;
+ int metrics_count = iiostat_metrics_count();
+ char *iiostat_cmd = calloc(len_template, 1);
+
+ if (!iiostat_cmd)
+ return -ENOMEM;
+
+ for (rp = list->rps; *rp; rp++) {
+ sprintf(iiostat_cmd, iiostat_cmd_template,
+ (*rp)->pmu_idx, (*rp)->pmu_idx, (*rp)->pmu_idx, (*rp)->pmu_idx);
+ ret = parse_events(evl, iiostat_cmd, NULL);
+ if (ret)
+ goto err;
+ }
+
+ evlist__for_each_entry(evl, evsel) {
+ evsel->perf_device = list->rps[evsel->idx / metrics_count];
+ }
+ list->nr_entries = 0;
+err:
+ iio_root_ports_list_free(list);
+ free(iiostat_cmd);
+ return ret;
+}
+
+int iiostat_parse(const struct option *opt, const char *str,
+ int unset __maybe_unused)
+{
+ int ret;
+ struct iio_root_ports_list *list;
+ struct evlist *evl = *(struct evlist **)opt->value;
+ struct perf_stat_config *config = (struct perf_stat_config *)opt->data;
+
+ if (evl->core.nr_entries > 0) {
+ pr_err("Unsupported event configuration\n");
+ return -1;
+ }
+ config->metric_only = true;
+ config->aggr_mode = AGGR_IIO_STACK;
+ config->iiostat_run = true;
+ ret = iio_root_ports_scan(&list);
+ if (ret)
+ return ret;
+
+ if (!str) {
+ iiostat_mode = IIOSTAT_RUN;
+ } else if (!strcmp(str, "show")) {
+ iiostat_mode = IIOSTAT_SHOW;
+ } else {
+ iiostat_mode = IIOSTAT_RUN;
+ ret = iio_root_ports_list_filter(&list, str);
+ if (ret)
+ return ret;
+ }
+ return iiostat_event_group(evl, list);
+}
+
+void iiostat_prefix(struct perf_stat_config *config,
+ struct evlist *evlist,
+ char *prefix, struct timespec *ts)
+{
+ struct iio_root_port *rp = evlist->selected->perf_device;
+
+ if (rp) {
+ if (ts)
+ sprintf(prefix, "%6lu.%09lu%s%04x:%02x%s",
+ ts->tv_sec, ts->tv_nsec,
+ config->csv_sep, rp->domain, rp->bus,
+ config->csv_sep);
+ else
+ sprintf(prefix, "%04x:%02x%s", rp->domain, rp->bus,
+ config->csv_sep);
+ }
+}
+
+void iiostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
+ struct perf_stat_output_ctx *out)
+{
+ double iiostat_value = 0;
+ u64 prev_count_val = 0;
+ const char *iiostat_metric = iiostat_metric_by_idx(evsel->idx);
+ u8 die = ((struct iio_root_port *)evsel->perf_device)->die;
+ struct perf_counts_values *count = perf_counts(evsel->counts, die, 0);
+
+ if (count->run && count->ena) {
+ if (evsel->prev_raw_counts && !out->force_header) {
+ struct perf_counts_values *prev_count = perf_counts(evsel->prev_raw_counts, die, 0);
+
+ prev_count_val = prev_count->val;
+ prev_count->val = count->val;
+ }
+ iiostat_value = (count->val - prev_count_val) / ((double) count->run / count->ena);
+ }
+ out->print_metric(config, out->ctx, NULL, "%8.0f", iiostat_metric,
+ iiostat_value / (256 * 1024));
+}
+
+int iiostat_show_root_ports(struct evlist *evlist, struct perf_stat_config *config)
+{
+ struct evsel *evsel;
+ struct iio_root_port *rp = NULL;
+ bool is_show_mode = (iiostat_mode == IIOSTAT_SHOW);
+
+ if (config->aggr_mode != AGGR_IIO_STACK) {
+ pr_err("Unsupported event configuration\n");
+ return -1;
+ }
+
+ if (is_show_mode || verbose) {
+ evlist__for_each_entry(evlist, evsel) {
+ if (!evsel->perf_device) {
+ pr_err("Unsupported event configuration\n");
+ return -1;
+ }
+ if (rp != evsel->perf_device) {
+ rp = evsel->perf_device;
+ iio_root_port_show(config->output, rp);
+ }
+ }
+ }
+ /* Stop iiostat in show mode*/
+ config->iiostat_run = !is_show_mode;
+ if (is_show_mode)
+ iiostat_delete_root_ports(evlist);
+ return 0;
+}
+
+void iiostat_delete_root_ports(struct evlist *evlist)
+{
+ struct evsel *evsel;
+ struct iio_root_port *rp = NULL;
+
+ evlist__for_each_entry(evlist, evsel) {
+ if (rp != evsel->perf_device) {
+ rp = evsel->perf_device;
+ free(evsel->perf_device);
+ }
+ }
+}
diff --git a/tools/perf/command-list.txt b/tools/perf/command-list.txt
index bc6c585f74fc..77e4c9410b0e 100644
--- a/tools/perf/command-list.txt
+++ b/tools/perf/command-list.txt
@@ -14,6 +14,7 @@ perf-config mainporcelain common
perf-evlist mainporcelain common
perf-ftrace mainporcelain common
perf-inject mainporcelain common
+perf-iiostat mainporcelain common
perf-kallsyms mainporcelain common
perf-kmem mainporcelain common
perf-kvm mainporcelain common
diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
new file mode 100644
index 000000000000..2c5168d2550b
--- /dev/null
+++ b/tools/perf/perf-iiostat.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# perf iiostat
+# Alexander Antonov <alexander.antonov@linux.intel.com>
+
+if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
+ DELIMITER="="
+else
+ DELIMITER=" "
+fi
+
+perf stat --iiostat$DELIMITER$*
\ No newline at end of file
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH v2 6/6] perf: Update .gitignore file
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
` (4 preceding siblings ...)
2020-12-23 13:03 ` [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms Alexander Antonov
@ 2020-12-23 13:03 ` Alexander Antonov
5 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2020-12-23 13:03 UTC (permalink / raw)
To: acme
Cc: linux-kernel, jolsa, ak, alexander.shishkin, mark.rutland,
namhyung, irogers, mingo, peterz, alexander.antonov
After a "make -C tools/perf", git reports the following untracked file:
perf-iiostat
Add this generated file to perf's .gitignore file.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
---
tools/perf/.gitignore | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/.gitignore b/tools/perf/.gitignore
index f3f84781fd74..ab826736e677 100644
--- a/tools/perf/.gitignore
+++ b/tools/perf/.gitignore
@@ -20,6 +20,7 @@ perf.data.old
output.svg
perf-archive
perf-with-kcore
+perf-iiostat
tags
TAGS
cscope*
--
2.19.1
^ permalink raw reply related [flat|nested] 19+ messages in thread
* Re: [PATCH v2 2/6] perf evsel: Introduce an observed performance device
2020-12-23 13:03 ` [PATCH v2 2/6] perf evsel: Introduce an observed performance device Alexander Antonov
@ 2021-01-06 8:44 ` Namhyung Kim
2021-01-13 11:13 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-06 8:44 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
Hi,
On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
> Adding evsel::perf_device void pointer.
>
> For performance monitoring purposes, an evsel can have a related device.
> These changes allow to attribute, for example, I/O performance metrics
> to IIO stack.
>
> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> ---
> tools/perf/util/evsel.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
> index 79a860d8e3ee..c346920f477a 100644
> --- a/tools/perf/util/evsel.h
> +++ b/tools/perf/util/evsel.h
> @@ -127,6 +127,7 @@ struct evsel {
> * See also evsel__has_callchain().
> */
> __u64 synth_sample_type;
> + void *perf_device;
Maybe we can use the existing 'priv' field.
Thanks,
Namhyung
> };
>
> struct perf_missing_features {
> --
> 2.19.1
>
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 3/6] perf stat: Basic support for iiostat in perf
2020-12-23 13:03 ` [PATCH v2 3/6] perf stat: Basic support for iiostat in perf Alexander Antonov
@ 2021-01-06 8:56 ` Namhyung Kim
2021-01-13 11:34 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-06 8:56 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
> Add basic flow for a new iiostat mode in perf. Mode is intended to
> provide four I/O performance metrics per each IIO stack: Inbound Read,
> Inbound Write, Outbound Read, Outbound Write.
It seems like a generic analysis and other archs can extend it later..
Then we can make it a bit more general.. at least, names? :)
>
> The actual code to compute the metrics and attribute it to
> evsel::perf_device is in follow-on patches.
>
> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> ---
> tools/perf/builtin-stat.c | 33 ++++++++++++++++++++++++++++-
> tools/perf/util/iiostat.h | 33 +++++++++++++++++++++++++++++
> tools/perf/util/stat-display.c | 38 +++++++++++++++++++++++++++++++++-
> tools/perf/util/stat-shadow.c | 11 +++++++++-
> tools/perf/util/stat.h | 1 +
> 5 files changed, 113 insertions(+), 3 deletions(-)
> create mode 100644 tools/perf/util/iiostat.h
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index 72f9d0aa3f96..14c3da136927 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -67,6 +67,7 @@
> #include "util/top.h"
> #include "util/affinity.h"
> #include "util/pfm.h"
> +#include "util/iiostat.h"
> #include "asm/bug.h"
>
> #include <linux/time64.h>
> @@ -198,7 +199,8 @@ static struct perf_stat_config stat_config = {
> .walltime_nsecs_stats = &walltime_nsecs_stats,
> .big_num = true,
> .ctl_fd = -1,
> - .ctl_fd_ack = -1
> + .ctl_fd_ack = -1,
> + .iiostat_run = false,
> };
>
> static bool cpus_map_matched(struct evsel *a, struct evsel *b)
> @@ -1073,6 +1075,14 @@ static int parse_stat_cgroups(const struct option *opt,
> return parse_cgroups(opt, str, unset);
> }
>
> +__weak int iiostat_parse(const struct option *opt __maybe_unused,
> + const char *str __maybe_unused,
> + int unset __maybe_unused)
> +{
> + pr_err("iiostat mode is not supported\n");
> + return -1;
> +}
> +
> static struct option stat_options[] = {
> OPT_BOOLEAN('T', "transaction", &transaction_run,
> "hardware transaction statistics"),
> @@ -1185,6 +1195,8 @@ static struct option stat_options[] = {
> "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
> "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
> parse_control_option),
> + OPT_CALLBACK_OPTARG(0, "iiostat", &evsel_list, &stat_config, "root port",
> + "measure PCIe metrics per IIO stack", iiostat_parse),
> OPT_END()
> };
>
> @@ -1509,6 +1521,12 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
> return 0;
> }
>
> +__weak int iiostat_show_root_ports(struct evlist *evlist __maybe_unused,
> + struct perf_stat_config *config __maybe_unused)
> +{
> + return 0;
> +}
I think it's too specific, maybe iiostat_prepare() ?
> +
> /*
> * Add default attributes, if there were no attributes specified or
> * if -d/--detailed, -d -d or -d -d -d is used:
> @@ -2054,6 +2072,10 @@ static void setup_system_wide(int forks)
> }
> }
>
> +__weak void iiostat_delete_root_ports(struct evlist *evlist __maybe_unused)
> +{
> +}
Same here..
> +
> int cmd_stat(int argc, const char **argv)
> {
> const char * const stat_usage[] = {
> @@ -2230,6 +2252,12 @@ int cmd_stat(int argc, const char **argv)
> goto out;
> }
>
> + if (stat_config.iiostat_run) {
> + status = iiostat_show_root_ports(evsel_list, &stat_config);
> + if (status || !stat_config.iiostat_run)
> + goto out;
> + }
> +
> if (add_default_attributes())
> goto out;
>
> @@ -2406,6 +2434,9 @@ int cmd_stat(int argc, const char **argv)
> perf_stat__exit_aggr_mode();
> perf_evlist__free_stats(evsel_list);
> out:
> + if (stat_config.iiostat_run)
> + iiostat_delete_root_ports(evsel_list);
> +
> zfree(&stat_config.walltime_run);
>
> if (smi_cost && smi_reset)
> diff --git a/tools/perf/util/iiostat.h b/tools/perf/util/iiostat.h
> new file mode 100644
> index 000000000000..8d4226df9975
> --- /dev/null
> +++ b/tools/perf/util/iiostat.h
> @@ -0,0 +1,33 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * perf iiostat
> + *
> + * Copyright (C) 2020, Intel Corporation
> + *
> + * Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
> + */
> +
> +#ifndef _IIOSTAT_H
> +#define _IIOSTAT_H
> +
> +#include <subcmd/parse-options.h>
> +#include "util/stat.h"
> +#include "util/parse-events.h"
> +#include "util/evlist.h"
> +
> +struct option;
> +struct perf_stat_config;
> +struct evlist;
> +struct timespec;
> +
> +int iiostat_parse(const struct option *opt, const char *str,
> + int unset __maybe_unused);
> +void iiostat_prefix(struct perf_stat_config *config, struct evlist *evlist,
> + char *prefix, struct timespec *ts);
> +void iiostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
> + struct perf_stat_output_ctx *out);
> +int iiostat_show_root_ports(struct evlist *evlist,
> + struct perf_stat_config *config);
> +void iiostat_delete_root_ports(struct evlist *evlist);
> +
> +#endif /* _IIOSTAT_H */
> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
> index 3bfcdb80443a..9eb8484e8b90 100644
> --- a/tools/perf/util/stat-display.c
> +++ b/tools/perf/util/stat-display.c
> @@ -17,6 +17,7 @@
> #include "cgroup.h"
> #include <api/fs/fs.h>
> #include "util.h"
> +#include "iiostat.h"
>
> #define CNTR_NOT_SUPPORTED "<not supported>"
> #define CNTR_NOT_COUNTED "<not counted>"
> @@ -310,6 +311,12 @@ static void print_metric_header(struct perf_stat_config *config,
> struct outstate *os = ctx;
> char tbuf[1024];
>
> + /* In case of iiostat, print metric header for first perf_device only */
> + if (os->evsel->perf_device && os->evsel->evlist->selected->perf_device &&
> + config->iiostat_run &&
When is the perf_device set? Is it possible to be NULL in the iiostat mode?
Thanks,
Namhyung
> + os->evsel->perf_device != os->evsel->evlist->selected->perf_device)
> + return;
> +
> if (!valid_only_metric(unit))
> return;
> unit = fixunit(tbuf, os->evsel, unit);
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2020-12-23 13:03 ` [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms Alexander Antonov
@ 2021-01-06 9:02 ` Namhyung Kim
2021-01-13 12:08 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-06 9:02 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
> This functionality is based on recently introduced sysfs attributes
> for Intel® Xeon® Scalable processor family (code name Skylake-SP):
> Commit bb42b3d39781 ("perf/x86/intel/uncore: Expose an Uncore unit to
> IIO PMON mapping")
>
> Mode is intended to provide four I/O performance metrics in MB per each
> IIO stack:
> - Inbound Read: I/O devices below IIO stack read from the host memory
> - Inbound Write: I/O devices below IIO stack write to the host memory
> - Outbound Read: CPU reads from I/O devices below IIO stack
> - Outbound Write: CPU writes to I/O devices below IIO stack
>
> Each metric requiries only one IIO event which increments at every 4B
> transfer in corresponding direction. The formulas to compute metrics
> are generic:
> #EventCount * 4B / (1024 * 1024)
Hmm.. maybe we can do this with JSON metrics, no?
>
> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> ---
> tools/perf/Documentation/perf-iiostat.txt | 89 ++++++
> tools/perf/Makefile.perf | 5 +-
> tools/perf/arch/x86/util/Build | 1 +
> tools/perf/arch/x86/util/iiostat.c | 337 ++++++++++++++++++++++
> tools/perf/command-list.txt | 1 +
> tools/perf/perf-iiostat.sh | 12 +
> 6 files changed, 444 insertions(+), 1 deletion(-)
> create mode 100644 tools/perf/Documentation/perf-iiostat.txt
> create mode 100644 tools/perf/perf-iiostat.sh
>
> diff --git a/tools/perf/Documentation/perf-iiostat.txt b/tools/perf/Documentation/perf-iiostat.txt
> new file mode 100644
> index 000000000000..38b5697b0d85
> --- /dev/null
> +++ b/tools/perf/Documentation/perf-iiostat.txt
> @@ -0,0 +1,89 @@
> +perf-iiostat(1)
> +===============
> +
> +NAME
> +----
> +perf-iiostat - Show I/O performance metrics
> +
> +SYNOPSIS
> +--------
> +[verse]
> +'perf iiostat' show
> +'perf iiostat' <ports> -- <command> [<options>]
> +
> +DESCRIPTION
> +-----------
> +Mode is intended to provide four I/O performance metrics per each IIO
> +stack (PCIe root port):
> +
> +- Inbound Read - I/O devices below IIO stack read from the host memory, in MB
> +
> +- Inbound Write - I/O devices below IIO stack write to the host memory, in MB
> +
> +- Outbound Read - CPU reads from I/O devices below IIO stack, in MB
> +
> +- Outbound Write - CPU writes to I/O devices below IIO stack, in MB
> +
> +OPTIONS
> +-------
> +<command>...::
> + Any command you can specify in a shell.
> +
> +show::
> + List all IIO stacks.
I'd prefer 'list' for this, but not a strong opinion..
> +
> +<ports>::
> + Select the root ports for monitoring. Comma-separated list is supported.
> +
> +EXAMPLES
> +--------
> +
> +1. List all IIO stacks (example for 2-S platform):
> +
> + $ perf iiostat show
> + S0-uncore_iio_0<0000:00>
> + S1-uncore_iio_0<0000:80>
> + S0-uncore_iio_1<0000:17>
> + S1-uncore_iio_1<0000:85>
> + S0-uncore_iio_2<0000:3a>
> + S1-uncore_iio_2<0000:ae>
> + S0-uncore_iio_3<0000:5d>
> + S1-uncore_iio_3<0000:d7>
> +
> +2. Collect metrics for all I/O stacks:
> +
> + $ perf iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
> + 357708+0 records in
> + 357707+0 records out
> + 375083606016 bytes (375 GB, 349 GiB) copied, 215.974 s, 1.7 GB/s
> +
> + Performance counter stats for 'system wide':
> +
> + port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
> + 0000:00 1 0 2 3
> + 0000:80 0 0 0 0
> + 0000:17 352552 43 0 21
> + 0000:85 0 0 0 0
> + 0000:3a 3 0 0 0
> + 0000:ae 0 0 0 0
> + 0000:5d 0 0 0 0
> + 0000:d7 0 0 0 0
> +
> +3. Collect metrics for comma-separated list of I/O stacks:
> +
> + $ perf iiostat 0000:17,0:3a -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
> + 357708+0 records in
> + 357707+0 records out
> + 375083606016 bytes (375 GB, 349 GiB) copied, 197.08 s, 1.9 GB/s
> +
> + Performance counter stats for 'system wide':
> +
> + port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
> + 0000:17 358559 44 0 22
> + 0000:3a 3 2 0 0
> +
> + 197.081983474 seconds time elapsed
> +
> +SEE ALSO
> +--------
> +linkperf:perf-stat[1]
> \ No newline at end of file
[SNIP]
> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
> new file mode 100644
> index 000000000000..2c5168d2550b
> --- /dev/null
> +++ b/tools/perf/perf-iiostat.sh
> @@ -0,0 +1,12 @@
> +#!/bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# perf iiostat
> +# Alexander Antonov <alexander.antonov@linux.intel.com>
> +
> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
> + DELIMITER="="
> +else
> + DELIMITER=" "
> +fi
> +
> +perf stat --iiostat$DELIMITER$*
Why is this needed?
Thanks,
Namhyung
> \ No newline at end of file
> --
> 2.19.1
>
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 2/6] perf evsel: Introduce an observed performance device
2021-01-06 8:44 ` Namhyung Kim
@ 2021-01-13 11:13 ` Alexander Antonov
0 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2021-01-13 11:13 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/6/2021 11:44 AM, Namhyung Kim wrote:
> Hi,
>
> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>> Adding evsel::perf_device void pointer.
>>
>> For performance monitoring purposes, an evsel can have a related device.
>> These changes allow to attribute, for example, I/O performance metrics
>> to IIO stack.
>>
>> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
>> ---
>> tools/perf/util/evsel.h | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
>> index 79a860d8e3ee..c346920f477a 100644
>> --- a/tools/perf/util/evsel.h
>> +++ b/tools/perf/util/evsel.h
>> @@ -127,6 +127,7 @@ struct evsel {
>> * See also evsel__has_callchain().
>> */
>> __u64 synth_sample_type;
>> + void *perf_device;
> Maybe we can use the existing 'priv' field.
>
> Thanks,
> Namhyung
Hello Namhyung,
Looks like the 'priv' field isn't used in this case. I suppose it can be
re-used in iiostat mode.
Thanks,
Alexander
>
>> };
>>
>> struct perf_missing_features {
>> --
>> 2.19.1
>>
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 3/6] perf stat: Basic support for iiostat in perf
2021-01-06 8:56 ` Namhyung Kim
@ 2021-01-13 11:34 ` Alexander Antonov
2021-01-14 3:34 ` Namhyung Kim
0 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2021-01-13 11:34 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/6/2021 11:56 AM, Namhyung Kim wrote:
> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>> Add basic flow for a new iiostat mode in perf. Mode is intended to
>> provide four I/O performance metrics per each IIO stack: Inbound Read,
>> Inbound Write, Outbound Read, Outbound Write.
> It seems like a generic analysis and other archs can extend it later..
> Then we can make it a bit more general.. at least, names? :)
I'm not sure that I fully understand you. Do you mean to rename metrics?
The mode is intended to provide PCIe metrics which are appliable for
other archs
as well.
Actually, I suppose we can rename 'iiostat' to 'pciestat' or something
like this
to make it a bit more general because the name 'IIO' (Integrated I/O
stack) is
Intel specific and it can be named in different way on other platforms.
In this
case the code has to be updated in the same way as well.
>
>> The actual code to compute the metrics and attribute it to
>> evsel::perf_device is in follow-on patches.
>>
>> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
>> ---
>> tools/perf/builtin-stat.c | 33 ++++++++++++++++++++++++++++-
>> tools/perf/util/iiostat.h | 33 +++++++++++++++++++++++++++++
>> tools/perf/util/stat-display.c | 38 +++++++++++++++++++++++++++++++++-
>> tools/perf/util/stat-shadow.c | 11 +++++++++-
>> tools/perf/util/stat.h | 1 +
>> 5 files changed, 113 insertions(+), 3 deletions(-)
>> create mode 100644 tools/perf/util/iiostat.h
>>
>> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
>> index 72f9d0aa3f96..14c3da136927 100644
>> --- a/tools/perf/builtin-stat.c
>> +++ b/tools/perf/builtin-stat.c
>> @@ -67,6 +67,7 @@
>> #include "util/top.h"
>> #include "util/affinity.h"
>> #include "util/pfm.h"
>> +#include "util/iiostat.h"
>> #include "asm/bug.h"
>>
>> #include <linux/time64.h>
>> @@ -198,7 +199,8 @@ static struct perf_stat_config stat_config = {
>> .walltime_nsecs_stats = &walltime_nsecs_stats,
>> .big_num = true,
>> .ctl_fd = -1,
>> - .ctl_fd_ack = -1
>> + .ctl_fd_ack = -1,
>> + .iiostat_run = false,
>> };
>>
>> static bool cpus_map_matched(struct evsel *a, struct evsel *b)
>> @@ -1073,6 +1075,14 @@ static int parse_stat_cgroups(const struct option *opt,
>> return parse_cgroups(opt, str, unset);
>> }
>>
>> +__weak int iiostat_parse(const struct option *opt __maybe_unused,
>> + const char *str __maybe_unused,
>> + int unset __maybe_unused)
>> +{
>> + pr_err("iiostat mode is not supported\n");
>> + return -1;
>> +}
>> +
>> static struct option stat_options[] = {
>> OPT_BOOLEAN('T', "transaction", &transaction_run,
>> "hardware transaction statistics"),
>> @@ -1185,6 +1195,8 @@ static struct option stat_options[] = {
>> "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
>> "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
>> parse_control_option),
>> + OPT_CALLBACK_OPTARG(0, "iiostat", &evsel_list, &stat_config, "root port",
>> + "measure PCIe metrics per IIO stack", iiostat_parse),
>> OPT_END()
>> };
>>
>> @@ -1509,6 +1521,12 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
>> return 0;
>> }
>>
>> +__weak int iiostat_show_root_ports(struct evlist *evlist __maybe_unused,
>> + struct perf_stat_config *config __maybe_unused)
>> +{
>> + return 0;
>> +}
> I think it's too specific, maybe iiostat_prepare() ?
What do you think about iiostat_show_root_ports() -> iiostat_show()?
>
>> +
>> /*
>> * Add default attributes, if there were no attributes specified or
>> * if -d/--detailed, -d -d or -d -d -d is used:
>> @@ -2054,6 +2072,10 @@ static void setup_system_wide(int forks)
>> }
>> }
>>
>> +__weak void iiostat_delete_root_ports(struct evlist *evlist __maybe_unused)
>> +{
>> +}
> Same here..
I suggest to rename iiostat_delete_root_ports() -> iiostat_release().
What do you think?
>
>> +
>> int cmd_stat(int argc, const char **argv)
>> {
>> const char * const stat_usage[] = {
>> @@ -2230,6 +2252,12 @@ int cmd_stat(int argc, const char **argv)
>> goto out;
>> }
>>
>> + if (stat_config.iiostat_run) {
>> + status = iiostat_show_root_ports(evsel_list, &stat_config);
>> + if (status || !stat_config.iiostat_run)
>> + goto out;
>> + }
>> +
>> if (add_default_attributes())
>> goto out;
>>
>> @@ -2406,6 +2434,9 @@ int cmd_stat(int argc, const char **argv)
>> perf_stat__exit_aggr_mode();
>> perf_evlist__free_stats(evsel_list);
>> out:
>> + if (stat_config.iiostat_run)
>> + iiostat_delete_root_ports(evsel_list);
>> +
>> zfree(&stat_config.walltime_run);
>>
>> if (smi_cost && smi_reset)
>> diff --git a/tools/perf/util/iiostat.h b/tools/perf/util/iiostat.h
>> new file mode 100644
>> index 000000000000..8d4226df9975
>> --- /dev/null
>> +++ b/tools/perf/util/iiostat.h
>> @@ -0,0 +1,33 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * perf iiostat
>> + *
>> + * Copyright (C) 2020, Intel Corporation
>> + *
>> + * Authors: Alexander Antonov <alexander.antonov@linux.intel.com>
>> + */
>> +
>> +#ifndef _IIOSTAT_H
>> +#define _IIOSTAT_H
>> +
>> +#include <subcmd/parse-options.h>
>> +#include "util/stat.h"
>> +#include "util/parse-events.h"
>> +#include "util/evlist.h"
>> +
>> +struct option;
>> +struct perf_stat_config;
>> +struct evlist;
>> +struct timespec;
>> +
>> +int iiostat_parse(const struct option *opt, const char *str,
>> + int unset __maybe_unused);
>> +void iiostat_prefix(struct perf_stat_config *config, struct evlist *evlist,
>> + char *prefix, struct timespec *ts);
>> +void iiostat_print_metric(struct perf_stat_config *config, struct evsel *evsel,
>> + struct perf_stat_output_ctx *out);
>> +int iiostat_show_root_ports(struct evlist *evlist,
>> + struct perf_stat_config *config);
>> +void iiostat_delete_root_ports(struct evlist *evlist);
>> +
>> +#endif /* _IIOSTAT_H */
>> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
>> index 3bfcdb80443a..9eb8484e8b90 100644
>> --- a/tools/perf/util/stat-display.c
>> +++ b/tools/perf/util/stat-display.c
>> @@ -17,6 +17,7 @@
>> #include "cgroup.h"
>> #include <api/fs/fs.h>
>> #include "util.h"
>> +#include "iiostat.h"
>>
>> #define CNTR_NOT_SUPPORTED "<not supported>"
>> #define CNTR_NOT_COUNTED "<not counted>"
>> @@ -310,6 +311,12 @@ static void print_metric_header(struct perf_stat_config *config,
>> struct outstate *os = ctx;
>> char tbuf[1024];
>>
>> + /* In case of iiostat, print metric header for first perf_device only */
>> + if (os->evsel->perf_device && os->evsel->evlist->selected->perf_device &&
>> + config->iiostat_run &&
> When is the perf_device set? Is it possible to be NULL in the iiostat mode?
>
> Thanks,
> Namhyung
>
The perf_device field is initialized inside iiostat.c::iiostat_event_group()
and it cannot be NULL.
The idea is to attribute events to PCIe ports through perf_device field.
Thanks,
Alexander
>> + os->evsel->perf_device != os->evsel->evlist->selected->perf_device)
>> + return;
>> +
>> if (!valid_only_metric(unit))
>> return;
>> unit = fixunit(tbuf, os->evsel, unit);
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2021-01-06 9:02 ` Namhyung Kim
@ 2021-01-13 12:08 ` Alexander Antonov
2021-01-14 3:39 ` Namhyung Kim
0 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2021-01-13 12:08 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/6/2021 12:02 PM, Namhyung Kim wrote:
> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>> This functionality is based on recently introduced sysfs attributes
>> for Intel® Xeon® Scalable processor family (code name Skylake-SP):
>> Commit bb42b3d39781 ("perf/x86/intel/uncore: Expose an Uncore unit to
>> IIO PMON mapping")
>>
>> Mode is intended to provide four I/O performance metrics in MB per each
>> IIO stack:
>> - Inbound Read: I/O devices below IIO stack read from the host memory
>> - Inbound Write: I/O devices below IIO stack write to the host memory
>> - Outbound Read: CPU reads from I/O devices below IIO stack
>> - Outbound Write: CPU writes to I/O devices below IIO stack
>>
>> Each metric requiries only one IIO event which increments at every 4B
>> transfer in corresponding direction. The formulas to compute metrics
>> are generic:
>> #EventCount * 4B / (1024 * 1024)
> Hmm.. maybe we can do this with JSON metrics, no?
Do you mean to add metrics to *-metrics.json file?
Looks like it's possible but in this case JSON file should be updated
for each
new enabled platform and calculations will be the same.
I would prefer to leave it as is because perf will work without changing of
userspace part once IIO sysfs attributes are added for new platforms.
>
>> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
>> ---
>> tools/perf/Documentation/perf-iiostat.txt | 89 ++++++
>> tools/perf/Makefile.perf | 5 +-
>> tools/perf/arch/x86/util/Build | 1 +
>> tools/perf/arch/x86/util/iiostat.c | 337 ++++++++++++++++++++++
>> tools/perf/command-list.txt | 1 +
>> tools/perf/perf-iiostat.sh | 12 +
>> 6 files changed, 444 insertions(+), 1 deletion(-)
>> create mode 100644 tools/perf/Documentation/perf-iiostat.txt
>> create mode 100644 tools/perf/perf-iiostat.sh
>>
>> diff --git a/tools/perf/Documentation/perf-iiostat.txt b/tools/perf/Documentation/perf-iiostat.txt
>> new file mode 100644
>> index 000000000000..38b5697b0d85
>> --- /dev/null
>> +++ b/tools/perf/Documentation/perf-iiostat.txt
>> @@ -0,0 +1,89 @@
>> +perf-iiostat(1)
>> +===============
>> +
>> +NAME
>> +----
>> +perf-iiostat - Show I/O performance metrics
>> +
>> +SYNOPSIS
>> +--------
>> +[verse]
>> +'perf iiostat' show
>> +'perf iiostat' <ports> -- <command> [<options>]
>> +
>> +DESCRIPTION
>> +-----------
>> +Mode is intended to provide four I/O performance metrics per each IIO
>> +stack (PCIe root port):
>> +
>> +- Inbound Read - I/O devices below IIO stack read from the host memory, in MB
>> +
>> +- Inbound Write - I/O devices below IIO stack write to the host memory, in MB
>> +
>> +- Outbound Read - CPU reads from I/O devices below IIO stack, in MB
>> +
>> +- Outbound Write - CPU writes to I/O devices below IIO stack, in MB
>> +
>> +OPTIONS
>> +-------
>> +<command>...::
>> + Any command you can specify in a shell.
>> +
>> +show::
>> + List all IIO stacks.
> I'd prefer 'list' for this, but not a strong opinion..
The 'list' is fine for me as well.
>
>> +
>> +<ports>::
>> + Select the root ports for monitoring. Comma-separated list is supported.
>> +
>> +EXAMPLES
>> +--------
>> +
>> +1. List all IIO stacks (example for 2-S platform):
>> +
>> + $ perf iiostat show
>> + S0-uncore_iio_0<0000:00>
>> + S1-uncore_iio_0<0000:80>
>> + S0-uncore_iio_1<0000:17>
>> + S1-uncore_iio_1<0000:85>
>> + S0-uncore_iio_2<0000:3a>
>> + S1-uncore_iio_2<0000:ae>
>> + S0-uncore_iio_3<0000:5d>
>> + S1-uncore_iio_3<0000:d7>
>> +
>> +2. Collect metrics for all I/O stacks:
>> +
>> + $ perf iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
>> + 357708+0 records in
>> + 357707+0 records out
>> + 375083606016 bytes (375 GB, 349 GiB) copied, 215.974 s, 1.7 GB/s
>> +
>> + Performance counter stats for 'system wide':
>> +
>> + port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
>> + 0000:00 1 0 2 3
>> + 0000:80 0 0 0 0
>> + 0000:17 352552 43 0 21
>> + 0000:85 0 0 0 0
>> + 0000:3a 3 0 0 0
>> + 0000:ae 0 0 0 0
>> + 0000:5d 0 0 0 0
>> + 0000:d7 0 0 0 0
>> +
>> +3. Collect metrics for comma-separated list of I/O stacks:
>> +
>> + $ perf iiostat 0000:17,0:3a -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct
>> + 357708+0 records in
>> + 357707+0 records out
>> + 375083606016 bytes (375 GB, 349 GiB) copied, 197.08 s, 1.9 GB/s
>> +
>> + Performance counter stats for 'system wide':
>> +
>> + port Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB)
>> + 0000:17 358559 44 0 22
>> + 0000:3a 3 2 0 0
>> +
>> + 197.081983474 seconds time elapsed
>> +
>> +SEE ALSO
>> +--------
>> +linkperf:perf-stat[1]
>> \ No newline at end of file
> [SNIP]
>> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
>> new file mode 100644
>> index 000000000000..2c5168d2550b
>> --- /dev/null
>> +++ b/tools/perf/perf-iiostat.sh
>> @@ -0,0 +1,12 @@
>> +#!/bin/bash
>> +# SPDX-License-Identifier: GPL-2.0
>> +# perf iiostat
>> +# Alexander Antonov <alexander.antonov@linux.intel.com>
>> +
>> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
>> + DELIMITER="="
>> +else
>> + DELIMITER=" "
>> +fi
>> +
>> +perf stat --iiostat$DELIMITER$*
> Why is this needed?
>
> Thanks,
> Namhyung
Arnaldo raised question relates to format of 'perf stat --iiostat'
subcommand
and explained how it can be changed to 'perf iiostat' through the aliases
mechanism in perf.
Thank you,
Alexander
>
>> \ No newline at end of file
>> --
>> 2.19.1
>>
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 3/6] perf stat: Basic support for iiostat in perf
2021-01-13 11:34 ` Alexander Antonov
@ 2021-01-14 3:34 ` Namhyung Kim
2021-01-14 16:30 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-14 3:34 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
Hello,
On Wed, Jan 13, 2021 at 8:34 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
>
> On 1/6/2021 11:56 AM, Namhyung Kim wrote:
> > On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> > <alexander.antonov@linux.intel.com> wrote:
> >> Add basic flow for a new iiostat mode in perf. Mode is intended to
> >> provide four I/O performance metrics per each IIO stack: Inbound Read,
> >> Inbound Write, Outbound Read, Outbound Write.
> > It seems like a generic analysis and other archs can extend it later..
> > Then we can make it a bit more general.. at least, names? :)
> I'm not sure that I fully understand you. Do you mean to rename metrics?
> The mode is intended to provide PCIe metrics which are appliable for
> other archs
> as well.
> Actually, I suppose we can rename 'iiostat' to 'pciestat' or something
> like this
> to make it a bit more general because the name 'IIO' (Integrated I/O
> stack) is
> Intel specific and it can be named in different way on other platforms.
> In this
> case the code has to be updated in the same way as well.
Maybe just 'iostat' ?
> >
> >> The actual code to compute the metrics and attribute it to
> >> evsel::perf_device is in follow-on patches.
> >>
> >> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> >> ---
> >> tools/perf/builtin-stat.c | 33 ++++++++++++++++++++++++++++-
> >> tools/perf/util/iiostat.h | 33 +++++++++++++++++++++++++++++
> >> tools/perf/util/stat-display.c | 38 +++++++++++++++++++++++++++++++++-
> >> tools/perf/util/stat-shadow.c | 11 +++++++++-
> >> tools/perf/util/stat.h | 1 +
> >> 5 files changed, 113 insertions(+), 3 deletions(-)
> >> create mode 100644 tools/perf/util/iiostat.h
> >>
> >> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> >> index 72f9d0aa3f96..14c3da136927 100644
> >> --- a/tools/perf/builtin-stat.c
> >> +++ b/tools/perf/builtin-stat.c
> >> @@ -67,6 +67,7 @@
> >> #include "util/top.h"
> >> #include "util/affinity.h"
> >> #include "util/pfm.h"
> >> +#include "util/iiostat.h"
> >> #include "asm/bug.h"
> >>
> >> #include <linux/time64.h>
> >> @@ -198,7 +199,8 @@ static struct perf_stat_config stat_config = {
> >> .walltime_nsecs_stats = &walltime_nsecs_stats,
> >> .big_num = true,
> >> .ctl_fd = -1,
> >> - .ctl_fd_ack = -1
> >> + .ctl_fd_ack = -1,
> >> + .iiostat_run = false,
> >> };
> >>
> >> static bool cpus_map_matched(struct evsel *a, struct evsel *b)
> >> @@ -1073,6 +1075,14 @@ static int parse_stat_cgroups(const struct option *opt,
> >> return parse_cgroups(opt, str, unset);
> >> }
> >>
> >> +__weak int iiostat_parse(const struct option *opt __maybe_unused,
> >> + const char *str __maybe_unused,
> >> + int unset __maybe_unused)
> >> +{
> >> + pr_err("iiostat mode is not supported\n");
> >> + return -1;
> >> +}
> >> +
> >> static struct option stat_options[] = {
> >> OPT_BOOLEAN('T', "transaction", &transaction_run,
> >> "hardware transaction statistics"),
> >> @@ -1185,6 +1195,8 @@ static struct option stat_options[] = {
> >> "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
> >> "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
> >> parse_control_option),
> >> + OPT_CALLBACK_OPTARG(0, "iiostat", &evsel_list, &stat_config, "root port",
> >> + "measure PCIe metrics per IIO stack", iiostat_parse),
> >> OPT_END()
> >> };
> >>
> >> @@ -1509,6 +1521,12 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
> >> return 0;
> >> }
> >>
> >> +__weak int iiostat_show_root_ports(struct evlist *evlist __maybe_unused,
> >> + struct perf_stat_config *config __maybe_unused)
> >> +{
> >> + return 0;
> >> +}
> > I think it's too specific, maybe iiostat_prepare() ?
> What do you think about iiostat_show_root_ports() -> iiostat_show()?
I'm ok with it, I thought it needs some initialization work there.
> >
> >> +
> >> /*
> >> * Add default attributes, if there were no attributes specified or
> >> * if -d/--detailed, -d -d or -d -d -d is used:
> >> @@ -2054,6 +2072,10 @@ static void setup_system_wide(int forks)
> >> }
> >> }
> >>
> >> +__weak void iiostat_delete_root_ports(struct evlist *evlist __maybe_unused)
> >> +{
> >> +}
> > Same here..
> I suggest to rename iiostat_delete_root_ports() -> iiostat_release().
> What do you think?
Looks good.
> >
> >> +
> >> int cmd_stat(int argc, const char **argv)
> >> {
> >> const char * const stat_usage[] = {
> >> @@ -2230,6 +2252,12 @@ int cmd_stat(int argc, const char **argv)
> >> goto out;
> >> }
> >>
> >> + if (stat_config.iiostat_run) {
> >> + status = iiostat_show_root_ports(evsel_list, &stat_config);
> >> + if (status || !stat_config.iiostat_run)
> >> + goto out;
> >> + }
> >> +
> >> if (add_default_attributes())
> >> goto out;
> >>
[SNIP]
> >> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
> >> index 3bfcdb80443a..9eb8484e8b90 100644
> >> --- a/tools/perf/util/stat-display.c
> >> +++ b/tools/perf/util/stat-display.c
> >> @@ -17,6 +17,7 @@
> >> #include "cgroup.h"
> >> #include <api/fs/fs.h>
> >> #include "util.h"
> >> +#include "iiostat.h"
> >>
> >> #define CNTR_NOT_SUPPORTED "<not supported>"
> >> #define CNTR_NOT_COUNTED "<not counted>"
> >> @@ -310,6 +311,12 @@ static void print_metric_header(struct perf_stat_config *config,
> >> struct outstate *os = ctx;
> >> char tbuf[1024];
> >>
> >> + /* In case of iiostat, print metric header for first perf_device only */
> >> + if (os->evsel->perf_device && os->evsel->evlist->selected->perf_device &&
> >> + config->iiostat_run &&
> > When is the perf_device set? Is it possible to be NULL in the iiostat mode?
> >
> The perf_device field is initialized inside iiostat.c::iiostat_event_group()
> and it cannot be NULL.
> The idea is to attribute events to PCIe ports through perf_device field.
>
If it's guaranteed non-NULL, we can check config->iiostat_run only and make
the condition simpler.
Thanks,
Namhyung
> >> + os->evsel->perf_device != os->evsel->evlist->selected->perf_device)
> >> + return;
> >> +
> >> if (!valid_only_metric(unit))
> >> return;
> >> unit = fixunit(tbuf, os->evsel, unit);
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2021-01-13 12:08 ` Alexander Antonov
@ 2021-01-14 3:39 ` Namhyung Kim
2021-01-14 16:41 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-14 3:39 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On Wed, Jan 13, 2021 at 9:08 PM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
>
>
> On 1/6/2021 12:02 PM, Namhyung Kim wrote:
> > On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> > <alexander.antonov@linux.intel.com> wrote:
> >> This functionality is based on recently introduced sysfs attributes
> >> for Intel® Xeon® Scalable processor family (code name Skylake-SP):
> >> Commit bb42b3d39781 ("perf/x86/intel/uncore: Expose an Uncore unit to
> >> IIO PMON mapping")
> >>
> >> Mode is intended to provide four I/O performance metrics in MB per each
> >> IIO stack:
> >> - Inbound Read: I/O devices below IIO stack read from the host memory
> >> - Inbound Write: I/O devices below IIO stack write to the host memory
> >> - Outbound Read: CPU reads from I/O devices below IIO stack
> >> - Outbound Write: CPU writes to I/O devices below IIO stack
> >>
> >> Each metric requiries only one IIO event which increments at every 4B
> >> transfer in corresponding direction. The formulas to compute metrics
> >> are generic:
> >> #EventCount * 4B / (1024 * 1024)
> > Hmm.. maybe we can do this with JSON metrics, no?
> Do you mean to add metrics to *-metrics.json file?
> Looks like it's possible but in this case JSON file should be updated
> for each
> new enabled platform and calculations will be the same.
> I would prefer to leave it as is because perf will work without changing of
> userspace part once IIO sysfs attributes are added for new platforms.
OK.
> >
> >> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
> >> ---
[SNIP]
> >> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
> >> new file mode 100644
> >> index 000000000000..2c5168d2550b
> >> --- /dev/null
> >> +++ b/tools/perf/perf-iiostat.sh
> >> @@ -0,0 +1,12 @@
> >> +#!/bin/bash
> >> +# SPDX-License-Identifier: GPL-2.0
> >> +# perf iiostat
> >> +# Alexander Antonov <alexander.antonov@linux.intel.com>
> >> +
> >> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
> >> + DELIMITER="="
> >> +else
> >> + DELIMITER=" "
> >> +fi
> >> +
> >> +perf stat --iiostat$DELIMITER$*
> > Why is this needed?
> >
> > Thanks,
> > Namhyung
> Arnaldo raised question relates to format of 'perf stat --iiostat'
> subcommand
> and explained how it can be changed to 'perf iiostat' through the aliases
> mechanism in perf.
Yeah, I know that. What I'm asking is the DELIMITER part.
Thanks,
Namhyung
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 3/6] perf stat: Basic support for iiostat in perf
2021-01-14 3:34 ` Namhyung Kim
@ 2021-01-14 16:30 ` Alexander Antonov
0 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2021-01-14 16:30 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/14/2021 6:34 AM, Namhyung Kim wrote:
> Hello,
>
> On Wed, Jan 13, 2021 at 8:34 PM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>>
>> On 1/6/2021 11:56 AM, Namhyung Kim wrote:
>>> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
>>> <alexander.antonov@linux.intel.com> wrote:
>>>> Add basic flow for a new iiostat mode in perf. Mode is intended to
>>>> provide four I/O performance metrics per each IIO stack: Inbound Read,
>>>> Inbound Write, Outbound Read, Outbound Write.
>>> It seems like a generic analysis and other archs can extend it later..
>>> Then we can make it a bit more general.. at least, names? :)
>> I'm not sure that I fully understand you. Do you mean to rename metrics?
>> The mode is intended to provide PCIe metrics which are appliable for
>> other archs
>> as well.
>> Actually, I suppose we can rename 'iiostat' to 'pciestat' or something
>> like this
>> to make it a bit more general because the name 'IIO' (Integrated I/O
>> stack) is
>> Intel specific and it can be named in different way on other platforms.
>> In this
>> case the code has to be updated in the same way as well.
> Maybe just 'iostat' ?
Yeah, it looks better :)
>
>>>> The actual code to compute the metrics and attribute it to
>>>> evsel::perf_device is in follow-on patches.
>>>>
>>>> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
>>>> ---
>>>> tools/perf/builtin-stat.c | 33 ++++++++++++++++++++++++++++-
>>>> tools/perf/util/iiostat.h | 33 +++++++++++++++++++++++++++++
>>>> tools/perf/util/stat-display.c | 38 +++++++++++++++++++++++++++++++++-
>>>> tools/perf/util/stat-shadow.c | 11 +++++++++-
>>>> tools/perf/util/stat.h | 1 +
>>>> 5 files changed, 113 insertions(+), 3 deletions(-)
>>>> create mode 100644 tools/perf/util/iiostat.h
>>>>
>>>> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
>>>> index 72f9d0aa3f96..14c3da136927 100644
>>>> --- a/tools/perf/builtin-stat.c
>>>> +++ b/tools/perf/builtin-stat.c
>>>> @@ -67,6 +67,7 @@
>>>> #include "util/top.h"
>>>> #include "util/affinity.h"
>>>> #include "util/pfm.h"
>>>> +#include "util/iiostat.h"
>>>> #include "asm/bug.h"
>>>>
>>>> #include <linux/time64.h>
>>>> @@ -198,7 +199,8 @@ static struct perf_stat_config stat_config = {
>>>> .walltime_nsecs_stats = &walltime_nsecs_stats,
>>>> .big_num = true,
>>>> .ctl_fd = -1,
>>>> - .ctl_fd_ack = -1
>>>> + .ctl_fd_ack = -1,
>>>> + .iiostat_run = false,
>>>> };
>>>>
>>>> static bool cpus_map_matched(struct evsel *a, struct evsel *b)
>>>> @@ -1073,6 +1075,14 @@ static int parse_stat_cgroups(const struct option *opt,
>>>> return parse_cgroups(opt, str, unset);
>>>> }
>>>>
>>>> +__weak int iiostat_parse(const struct option *opt __maybe_unused,
>>>> + const char *str __maybe_unused,
>>>> + int unset __maybe_unused)
>>>> +{
>>>> + pr_err("iiostat mode is not supported\n");
>>>> + return -1;
>>>> +}
>>>> +
>>>> static struct option stat_options[] = {
>>>> OPT_BOOLEAN('T', "transaction", &transaction_run,
>>>> "hardware transaction statistics"),
>>>> @@ -1185,6 +1195,8 @@ static struct option stat_options[] = {
>>>> "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
>>>> "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
>>>> parse_control_option),
>>>> + OPT_CALLBACK_OPTARG(0, "iiostat", &evsel_list, &stat_config, "root port",
>>>> + "measure PCIe metrics per IIO stack", iiostat_parse),
>>>> OPT_END()
>>>> };
>>>>
>>>> @@ -1509,6 +1521,12 @@ static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
>>>> return 0;
>>>> }
>>>>
>>>> +__weak int iiostat_show_root_ports(struct evlist *evlist __maybe_unused,
>>>> + struct perf_stat_config *config __maybe_unused)
>>>> +{
>>>> + return 0;
>>>> +}
>>> I think it's too specific, maybe iiostat_prepare() ?
>> What do you think about iiostat_show_root_ports() -> iiostat_show()?
> I'm ok with it, I thought it needs some initialization work there.
>
>>>> +
>>>> /*
>>>> * Add default attributes, if there were no attributes specified or
>>>> * if -d/--detailed, -d -d or -d -d -d is used:
>>>> @@ -2054,6 +2072,10 @@ static void setup_system_wide(int forks)
>>>> }
>>>> }
>>>>
>>>> +__weak void iiostat_delete_root_ports(struct evlist *evlist __maybe_unused)
>>>> +{
>>>> +}
>>> Same here..
>> I suggest to rename iiostat_delete_root_ports() -> iiostat_release().
>> What do you think?
> Looks good.
>
>>>> +
>>>> int cmd_stat(int argc, const char **argv)
>>>> {
>>>> const char * const stat_usage[] = {
>>>> @@ -2230,6 +2252,12 @@ int cmd_stat(int argc, const char **argv)
>>>> goto out;
>>>> }
>>>>
>>>> + if (stat_config.iiostat_run) {
>>>> + status = iiostat_show_root_ports(evsel_list, &stat_config);
>>>> + if (status || !stat_config.iiostat_run)
>>>> + goto out;
>>>> + }
>>>> +
>>>> if (add_default_attributes())
>>>> goto out;
>>>>
> [SNIP]
>>>> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
>>>> index 3bfcdb80443a..9eb8484e8b90 100644
>>>> --- a/tools/perf/util/stat-display.c
>>>> +++ b/tools/perf/util/stat-display.c
>>>> @@ -17,6 +17,7 @@
>>>> #include "cgroup.h"
>>>> #include <api/fs/fs.h>
>>>> #include "util.h"
>>>> +#include "iiostat.h"
>>>>
>>>> #define CNTR_NOT_SUPPORTED "<not supported>"
>>>> #define CNTR_NOT_COUNTED "<not counted>"
>>>> @@ -310,6 +311,12 @@ static void print_metric_header(struct perf_stat_config *config,
>>>> struct outstate *os = ctx;
>>>> char tbuf[1024];
>>>>
>>>> + /* In case of iiostat, print metric header for first perf_device only */
>>>> + if (os->evsel->perf_device && os->evsel->evlist->selected->perf_device &&
>>>> + config->iiostat_run &&
>>> When is the perf_device set? Is it possible to be NULL in the iiostat mode?
>>>
>> The perf_device field is initialized inside iiostat.c::iiostat_event_group()
>> and it cannot be NULL.
>> The idea is to attribute events to PCIe ports through perf_device field.
>>
> If it's guaranteed non-NULL, we can check config->iiostat_run only and make
> the condition simpler.
>
> Thanks,
> Namhyung
>
I will update it in the next version of patchset.
Thanks,
Alexander
>
>>>> + os->evsel->perf_device != os->evsel->evlist->selected->perf_device)
>>>> + return;
>>>> +
>>>> if (!valid_only_metric(unit))
>>>> return;
>>>> unit = fixunit(tbuf, os->evsel, unit);
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2021-01-14 3:39 ` Namhyung Kim
@ 2021-01-14 16:41 ` Alexander Antonov
2021-01-15 7:33 ` Namhyung Kim
0 siblings, 1 reply; 19+ messages in thread
From: Alexander Antonov @ 2021-01-14 16:41 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/14/2021 6:39 AM, Namhyung Kim wrote:
> On Wed, Jan 13, 2021 at 9:08 PM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>>
>> On 1/6/2021 12:02 PM, Namhyung Kim wrote:
>>> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
>>> <alexander.antonov@linux.intel.com> wrote:
>>>> This functionality is based on recently introduced sysfs attributes
>>>> for Intel® Xeon® Scalable processor family (code name Skylake-SP):
>>>> Commit bb42b3d39781 ("perf/x86/intel/uncore: Expose an Uncore unit to
>>>> IIO PMON mapping")
>>>>
>>>> Mode is intended to provide four I/O performance metrics in MB per each
>>>> IIO stack:
>>>> - Inbound Read: I/O devices below IIO stack read from the host memory
>>>> - Inbound Write: I/O devices below IIO stack write to the host memory
>>>> - Outbound Read: CPU reads from I/O devices below IIO stack
>>>> - Outbound Write: CPU writes to I/O devices below IIO stack
>>>>
>>>> Each metric requiries only one IIO event which increments at every 4B
>>>> transfer in corresponding direction. The formulas to compute metrics
>>>> are generic:
>>>> #EventCount * 4B / (1024 * 1024)
>>> Hmm.. maybe we can do this with JSON metrics, no?
>> Do you mean to add metrics to *-metrics.json file?
>> Looks like it's possible but in this case JSON file should be updated
>> for each
>> new enabled platform and calculations will be the same.
>> I would prefer to leave it as is because perf will work without changing of
>> userspace part once IIO sysfs attributes are added for new platforms.
> OK.
>
>>>> Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
>>>> ---
> [SNIP]
>>>> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
>>>> new file mode 100644
>>>> index 000000000000..2c5168d2550b
>>>> --- /dev/null
>>>> +++ b/tools/perf/perf-iiostat.sh
>>>> @@ -0,0 +1,12 @@
>>>> +#!/bin/bash
>>>> +# SPDX-License-Identifier: GPL-2.0
>>>> +# perf iiostat
>>>> +# Alexander Antonov <alexander.antonov@linux.intel.com>
>>>> +
>>>> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
>>>> + DELIMITER="="
>>>> +else
>>>> + DELIMITER=" "
>>>> +fi
>>>> +
>>>> +perf stat --iiostat$DELIMITER$*
>>> Why is this needed?
>>>
>>> Thanks,
>>> Namhyung
>> Arnaldo raised question relates to format of 'perf stat --iiostat'
>> subcommand
>> and explained how it can be changed to 'perf iiostat' through the aliases
>> mechanism in perf.
> Yeah, I know that. What I'm asking is the DELIMITER part.
>
> Thanks,
> Namhyung
I'm using DELIMITER to resolve two different cases for format of iiostat
command:
The first one is the command with an option for iiostat mode, for example:
'perf iiostat show' which should be converted to 'perf stat
--iiostat=show' or
'perf iiostat 0000:ae,0000:5d' to 'perf stat --iiostat=0000:ae,0000:5d'.
The second is the command without any option for iiostat: 'perf iiostat
-I 1000'
should be converted to 'perf stat --iiostat -I 1000'.
Thanks,
Alexander
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2021-01-14 16:41 ` Alexander Antonov
@ 2021-01-15 7:33 ` Namhyung Kim
2021-01-15 14:34 ` Alexander Antonov
0 siblings, 1 reply; 19+ messages in thread
From: Namhyung Kim @ 2021-01-15 7:33 UTC (permalink / raw)
To: Alexander Antonov
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On Fri, Jan 15, 2021 at 1:41 AM Alexander Antonov
<alexander.antonov@linux.intel.com> wrote:
> On 1/14/2021 6:39 AM, Namhyung Kim wrote:
> > On Wed, Jan 13, 2021 at 9:08 PM Alexander Antonov
> > <alexander.antonov@linux.intel.com> wrote:
> >>
> >> On 1/6/2021 12:02 PM, Namhyung Kim wrote:
> >>> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
> >>>> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
> >>>> new file mode 100644
> >>>> index 000000000000..2c5168d2550b
> >>>> --- /dev/null
> >>>> +++ b/tools/perf/perf-iiostat.sh
> >>>> @@ -0,0 +1,12 @@
> >>>> +#!/bin/bash
> >>>> +# SPDX-License-Identifier: GPL-2.0
> >>>> +# perf iiostat
> >>>> +# Alexander Antonov <alexander.antonov@linux.intel.com>
> >>>> +
> >>>> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
> >>>> + DELIMITER="="
> >>>> +else
> >>>> + DELIMITER=" "
> >>>> +fi
> >>>> +
> >>>> +perf stat --iiostat$DELIMITER$*
> >>> Why is this needed?
> >>>
> >>> Thanks,
> >>> Namhyung
> >> Arnaldo raised question relates to format of 'perf stat --iiostat'
> >> subcommand
> >> and explained how it can be changed to 'perf iiostat' through the aliases
> >> mechanism in perf.
> > Yeah, I know that. What I'm asking is the DELIMITER part.
> >
> > Thanks,
> > Namhyung
> I'm using DELIMITER to resolve two different cases for format of iiostat
> command:
> The first one is the command with an option for iiostat mode, for example:
> 'perf iiostat show' which should be converted to 'perf stat
> --iiostat=show' or
> 'perf iiostat 0000:ae,0000:5d' to 'perf stat --iiostat=0000:ae,0000:5d'.
> The second is the command without any option for iiostat: 'perf iiostat
> -I 1000'
> should be converted to 'perf stat --iiostat -I 1000'.
Can't we simply use a whitespace ?
Thanks,
Namhyung
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms
2021-01-15 7:33 ` Namhyung Kim
@ 2021-01-15 14:34 ` Alexander Antonov
0 siblings, 0 replies; 19+ messages in thread
From: Alexander Antonov @ 2021-01-15 14:34 UTC (permalink / raw)
To: Namhyung Kim
Cc: Arnaldo Carvalho de Melo, linux-kernel, Jiri Olsa, Andi Kleen,
Alexander Shishkin, Mark Rutland, Ian Rogers, Ingo Molnar,
Peter Zijlstra
On 1/15/2021 10:33 AM, Namhyung Kim wrote:
> On Fri, Jan 15, 2021 at 1:41 AM Alexander Antonov
> <alexander.antonov@linux.intel.com> wrote:
>> On 1/14/2021 6:39 AM, Namhyung Kim wrote:
>>> On Wed, Jan 13, 2021 at 9:08 PM Alexander Antonov
>>> <alexander.antonov@linux.intel.com> wrote:
>>>> On 1/6/2021 12:02 PM, Namhyung Kim wrote:
>>>>> On Wed, Dec 23, 2020 at 10:03 PM Alexander Antonov
>>>>>> diff --git a/tools/perf/perf-iiostat.sh b/tools/perf/perf-iiostat.sh
>>>>>> new file mode 100644
>>>>>> index 000000000000..2c5168d2550b
>>>>>> --- /dev/null
>>>>>> +++ b/tools/perf/perf-iiostat.sh
>>>>>> @@ -0,0 +1,12 @@
>>>>>> +#!/bin/bash
>>>>>> +# SPDX-License-Identifier: GPL-2.0
>>>>>> +# perf iiostat
>>>>>> +# Alexander Antonov <alexander.antonov@linux.intel.com>
>>>>>> +
>>>>>> +if [[ "$1" == "show" ]] || [[ "$1" =~ ([a-f0-9A-F]{1,}):([a-f0-9A-F]{1,2})(,)? ]]; then
>>>>>> + DELIMITER="="
>>>>>> +else
>>>>>> + DELIMITER=" "
>>>>>> +fi
>>>>>> +
>>>>>> +perf stat --iiostat$DELIMITER$*
>>>>> Why is this needed?
>>>>>
>>>>> Thanks,
>>>>> Namhyung
>>>> Arnaldo raised question relates to format of 'perf stat --iiostat'
>>>> subcommand
>>>> and explained how it can be changed to 'perf iiostat' through the aliases
>>>> mechanism in perf.
>>> Yeah, I know that. What I'm asking is the DELIMITER part.
>>>
>>> Thanks,
>>> Namhyung
>> I'm using DELIMITER to resolve two different cases for format of iiostat
>> command:
>> The first one is the command with an option for iiostat mode, for example:
>> 'perf iiostat show' which should be converted to 'perf stat
>> --iiostat=show' or
>> 'perf iiostat 0000:ae,0000:5d' to 'perf stat --iiostat=0000:ae,0000:5d'.
>> The second is the command without any option for iiostat: 'perf iiostat
>> -I 1000'
>> should be converted to 'perf stat --iiostat -I 1000'.
> Can't we simply use a whitespace ?
We need to use the equal sign to pass arguments to iiostat mode.
Thanks,
Alexander
^ permalink raw reply [flat|nested] 19+ messages in thread
end of thread, other threads:[~2021-01-15 14:37 UTC | newest]
Thread overview: 19+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-12-23 13:03 [PATCH v2 0/6] perf stat: Introduce iiostat mode to provide I/O performance metrics Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 1/6] perf stat: Add AGGR_IIO_STACK mode Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 2/6] perf evsel: Introduce an observed performance device Alexander Antonov
2021-01-06 8:44 ` Namhyung Kim
2021-01-13 11:13 ` Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 3/6] perf stat: Basic support for iiostat in perf Alexander Antonov
2021-01-06 8:56 ` Namhyung Kim
2021-01-13 11:34 ` Alexander Antonov
2021-01-14 3:34 ` Namhyung Kim
2021-01-14 16:30 ` Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 4/6] perf stat: Helper functions for IIO stacks list in iiostat mode Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 5/6] perf stat: Enable iiostat mode for x86 platforms Alexander Antonov
2021-01-06 9:02 ` Namhyung Kim
2021-01-13 12:08 ` Alexander Antonov
2021-01-14 3:39 ` Namhyung Kim
2021-01-14 16:41 ` Alexander Antonov
2021-01-15 7:33 ` Namhyung Kim
2021-01-15 14:34 ` Alexander Antonov
2020-12-23 13:03 ` [PATCH v2 6/6] perf: Update .gitignore file Alexander Antonov
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