From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Thomas Richter <tmricht@linux.ibm.com>,
Hendrik Brueckner <brueckner@linux.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 12/24] perf report: Dump s390 counter set data to file
Date: Mon, 21 Jan 2019 20:56:54 -0300 [thread overview]
Message-ID: <20190121235706.20005-13-acme@kernel.org> (raw)
In-Reply-To: <20190121235706.20005-1-acme@kernel.org>
From: Thomas Richter <tmricht@linux.ibm.com>
Add support for the new s390 PMU device cpum_cf_diag to extract the
counter set diagnostic data. This data is available as event raw data
and can be created with this command:
[root@s35lp76 perf]# ./perf record -R -e '{rbd000,rbc000}' --
~/mytests/facultaet 2500
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.009 MB perf.data ]
[root@s35lp76 perf]#
The new event 0xbc000 generated this counter set diagnostic trace data.
The data can be extracted using command:
[root@s35lp76 perf]# ./perf report --stdio --itrace=d
#
# Total Lost Samples: 0
#
# Samples: 21 of events 'anon group { rbd000, rbc000 }'
# Event count (approx.): 21
#
# Overhead Command Shared Object Symbol
# ................ ......... ................. ........................
#
80.95% 0.00% facultaet facultaet [.] facultaet
4.76% 0.00% facultaet [kernel.kallsyms] [k] check_chain_key
4.76% 0.00% facultaet [kernel.kallsyms] [k] ftrace_likely_update
4.76% 0.00% facultaet [kernel.kallsyms] [k] lock_release
4.76% 0.00% facultaet libc-2.26.so [.] _dl_addr
[root@s35lp76 perf]# ll aux*
-rw-r--r-- 1 root root 3408 Oct 16 12:40 aux.ctr.02
-rw-r--r-- 1 root root 4096 Oct 16 12:40 aux.smp.02
[root@s35lp76 perf]#
The files named aux.ctr.## contain the counter set diagnostic data and
the files named aux.smp.## contain the sampling diagnostic data. ##
stand for the CPU number the data was taken from.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20190117093003.96287-4-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/s390-cpumsf.c | 77 +++++++++++++++++++++++++++++++++--
1 file changed, 73 insertions(+), 4 deletions(-)
diff --git a/tools/perf/util/s390-cpumsf.c b/tools/perf/util/s390-cpumsf.c
index 68b2570304ec..835249c77f56 100644
--- a/tools/perf/util/s390-cpumsf.c
+++ b/tools/perf/util/s390-cpumsf.c
@@ -162,6 +162,7 @@
#include "auxtrace.h"
#include "s390-cpumsf.h"
#include "s390-cpumsf-kernel.h"
+#include "s390-cpumcf-kernel.h"
#include "config.h"
struct s390_cpumsf {
@@ -184,8 +185,58 @@ struct s390_cpumsf_queue {
struct auxtrace_buffer *buffer;
int cpu;
FILE *logfile;
+ FILE *logfile_ctr;
};
+/* Check if the raw data should be dumped to file. If this is the case and
+ * the file to dump to has not been opened for writing, do so.
+ *
+ * Return 0 on success and greater zero on error so processing continues.
+ */
+static int s390_cpumcf_dumpctr(struct s390_cpumsf *sf,
+ struct perf_sample *sample)
+{
+ struct s390_cpumsf_queue *sfq;
+ struct auxtrace_queue *q;
+ int rc = 0;
+
+ if (!sf->use_logfile || sf->queues.nr_queues <= sample->cpu)
+ return rc;
+
+ q = &sf->queues.queue_array[sample->cpu];
+ sfq = q->priv;
+ if (!sfq) /* Queue not yet allocated */
+ return rc;
+
+ if (!sfq->logfile_ctr) {
+ char *name;
+
+ rc = (sf->logdir)
+ ? asprintf(&name, "%s/aux.ctr.%02x",
+ sf->logdir, sample->cpu)
+ : asprintf(&name, "aux.ctr.%02x", sample->cpu);
+ if (rc > 0)
+ sfq->logfile_ctr = fopen(name, "w");
+ if (sfq->logfile_ctr == NULL) {
+ pr_err("Failed to open counter set log file %s, "
+ "continue...\n", name);
+ rc = 1;
+ }
+ free(name);
+ }
+
+ if (sfq->logfile_ctr) {
+ /* See comment above for -4 */
+ size_t n = fwrite(sample->raw_data, sample->raw_size - 4, 1,
+ sfq->logfile_ctr);
+ if (n != 1) {
+ pr_err("Failed to write counter set data\n");
+ rc = 1;
+ }
+ }
+ return rc;
+}
+
/* Display s390 CPU measurement facility basic-sampling data entry */
static bool s390_cpumsf_basic_show(const char *color, size_t pos,
struct hws_basic_entry *basic)
@@ -792,7 +843,7 @@ static int s390_cpumsf_lost(struct s390_cpumsf *sf, struct perf_sample *sample)
}
static int
-s390_cpumsf_process_event(struct perf_session *session __maybe_unused,
+s390_cpumsf_process_event(struct perf_session *session,
union perf_event *event,
struct perf_sample *sample,
struct perf_tool *tool)
@@ -801,6 +852,8 @@ s390_cpumsf_process_event(struct perf_session *session __maybe_unused,
struct s390_cpumsf,
auxtrace);
u64 timestamp = sample->time;
+ struct perf_evsel *ev_bc000;
+
int err = 0;
if (dump_trace)
@@ -811,6 +864,16 @@ s390_cpumsf_process_event(struct perf_session *session __maybe_unused,
return -EINVAL;
}
+ if (event->header.type == PERF_RECORD_SAMPLE &&
+ sample->raw_size) {
+ /* Handle event with raw data */
+ ev_bc000 = perf_evlist__event2evsel(session->evlist, event);
+ if (ev_bc000 &&
+ ev_bc000->attr.config == PERF_EVENT_CPUM_CF_DIAG)
+ err = s390_cpumcf_dumpctr(sf, sample);
+ return err;
+ }
+
if (event->header.type == PERF_RECORD_AUX &&
event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
return s390_cpumsf_lost(sf, sample);
@@ -891,9 +954,15 @@ static void s390_cpumsf_free_queues(struct perf_session *session)
struct s390_cpumsf_queue *sfq = (struct s390_cpumsf_queue *)
queues->queue_array[i].priv;
- if (sfq != NULL && sfq->logfile) {
- fclose(sfq->logfile);
- sfq->logfile = NULL;
+ if (sfq != NULL) {
+ if (sfq->logfile) {
+ fclose(sfq->logfile);
+ sfq->logfile = NULL;
+ }
+ if (sfq->logfile_ctr) {
+ fclose(sfq->logfile_ctr);
+ sfq->logfile_ctr = NULL;
+ }
}
zfree(&queues->queue_array[i].priv);
}
--
2.20.1
next prev parent reply other threads:[~2019-01-21 23:58 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-21 23:56 [GIT PULL 00/24] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 01/24] perf tools: Replace automatic const char[] variables by statics Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 02/24] perf session: Rearrange perf_session__process_events function Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 03/24] perf session: Get rid of file_size variable Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 04/24] perf session: Add reader object Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 05/24] perf session: Add 'data_size' member to " Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 06/24] perf session: Add 'data_offset' " Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 07/24] perf session: Add reader__process_events function Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 08/24] perf: Remove duplicated workqueue.h include from perf_event.h Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 09/24] perf tools: Remove duplicate headers Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 10/24] perf report: Display arch specific diagnostic counter sets, starting with s390 Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 11/24] perf report: Display names in s390 diagnostic counter sets Arnaldo Carvalho de Melo
2019-01-21 23:56 ` Arnaldo Carvalho de Melo [this message]
2019-01-21 23:56 ` [PATCH 13/24] perf: Make perf_event_output() propagate the output() return Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 14/24] perf, bpf: Introduce PERF_RECORD_KSYMBOL Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 15/24] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 16/24] perf, bpf: Introduce PERF_RECORD_BPF_EVENT Arnaldo Carvalho de Melo
2019-01-21 23:56 ` [PATCH 17/24] tools headers uapi: Sync tools/include/uapi/linux/perf_event.h Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 18/24] perf tools: Handle PERF_RECORD_KSYMBOL Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 19/24] perf tools: Handle PERF_RECORD_BPF_EVENT Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 20/24] perf tools: Synthesize PERF_RECORD_* for loaded BPF programs Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 21/24] perf top: Synthesize BPF events for pre-existing " Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 22/24] bpf: Add module name [bpf] to ksymbols for bpf programs Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 23/24] perf python: Remove -fstack-clash-protection when building with some clang versions Arnaldo Carvalho de Melo
2019-01-21 23:57 ` [PATCH 24/24] perf utils: Move perf_config using routines from color.c to separate object Arnaldo Carvalho de Melo
2019-01-22 10:07 ` [GIT PULL 00/24] perf/core improvements and fixes Ingo Molnar
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