* [PATCH] perf script: add option to display time change between events
@ 2011-08-18 17:05 David Ahern
2011-08-24 22:03 ` David Ahern
0 siblings, 1 reply; 2+ messages in thread
From: David Ahern @ 2011-08-18 17:05 UTC (permalink / raw)
To: linux-perf-users, linux-kernel
Cc: acme, mingo, peterz, fweisbec, paulus, tglx, David Ahern
Add a 'dt' field option to show time change between events dumped to user:
swapper 0 [000] 0.003780: netif_receive_skb: dev=wlan0 skbaddr=...
vpnc 23605 [000] 0.000347: netif_rx: dev=tun0 skbaddr=...
vpnc 23605 [000] 0.000007: netif_receive_skb: dev=tun0 skbaddr=...
thunderbird-bin 22435 [000] 0.001043: net_dev_queue: dev=tun0 skbaddr=...
thunderbird-bin 22435 [000] 0.000012: net_dev_xmit: dev=tun0 skbaddr=...
Signed-off-by: David Ahern <dsahern@gmail.com>
---
tools/perf/Documentation/perf-script.txt | 2 +-
tools/perf/builtin-script.c | 20 +++++++++++++++++++-
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index db01786..4f996ab 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -115,7 +115,7 @@ OPTIONS
-f::
--fields::
Comma separated list of fields to print. Options are:
- comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr.
+ comm, tid, pid, time, dt, cpu, event, trace, ip, sym, dso, addr.
Field list can be prepended with the type, trace, sw or hw,
to indicate to which event type the field list applies.
e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 09024ec..541b30a 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -37,6 +37,7 @@ enum perf_output_field {
PERF_OUTPUT_SYM = 1U << 8,
PERF_OUTPUT_DSO = 1U << 9,
PERF_OUTPUT_ADDR = 1U << 10,
+ PERF_OUTPUT_DT = 1U << 11,
};
struct output_option {
@@ -54,6 +55,7 @@ struct output_option {
{.str = "sym", .field = PERF_OUTPUT_SYM},
{.str = "dso", .field = PERF_OUTPUT_DSO},
{.str = "addr", .field = PERF_OUTPUT_ADDR},
+ {.str = "dt", .field = PERF_OUTPUT_DT},
};
/* default set to maintain compatibility with current format */
@@ -207,6 +209,11 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
PERF_OUTPUT_TIME))
return -EINVAL;
+ if (PRINT_FIELD(DT) &&
+ perf_event_attr__check_stype(attr, PERF_SAMPLE_TIME, "DT",
+ PERF_OUTPUT_DT))
+ return -EINVAL;
+
if (PRINT_FIELD(CPU) &&
perf_event_attr__check_stype(attr, PERF_SAMPLE_CPU, "CPU",
PERF_OUTPUT_CPU))
@@ -288,6 +295,17 @@ static void print_sample_start(struct perf_sample *sample,
printf("%5lu.%06lu: ", secs, usecs);
}
+ if (PRINT_FIELD(DT)) {
+ static u64 prev_sample_time;
+
+ nsecs = prev_sample_time ? sample->time - prev_sample_time : 0;
+ prev_sample_time = sample->time;
+ secs = nsecs / NSECS_PER_SEC;
+ nsecs -= secs * NSECS_PER_SEC;
+ usecs = nsecs / NSECS_PER_USEC;
+ printf("%lu.%06lu: ", secs, usecs);
+ }
+
if (PRINT_FIELD(EVNAME)) {
if (attr->type == PERF_TYPE_TRACEPOINT) {
type = trace_parse_common_type(sample->raw_data);
@@ -1080,7 +1098,7 @@ static const struct option options[] = {
OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
"Look for files with symbols relative to this directory"),
OPT_CALLBACK('f', "fields", NULL, "str",
- "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
+ "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,dt,cpu,event,trace,ip,sym,dso,addr",
parse_output_fields),
OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
--
1.7.6
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] perf script: add option to display time change between events
2011-08-18 17:05 [PATCH] perf script: add option to display time change between events David Ahern
@ 2011-08-24 22:03 ` David Ahern
0 siblings, 0 replies; 2+ messages in thread
From: David Ahern @ 2011-08-24 22:03 UTC (permalink / raw)
To: acme
Cc: linux-perf-users, linux-kernel, mingo, peterz, fweisbec, paulus, tglx
Disregard. The time delta needs to be on a per-cpu basis. I'll redo.
On 08/18/2011 11:05 AM, David Ahern wrote:
> Add a 'dt' field option to show time change between events dumped to user:
>
> swapper 0 [000] 0.003780: netif_receive_skb: dev=wlan0 skbaddr=...
> vpnc 23605 [000] 0.000347: netif_rx: dev=tun0 skbaddr=...
> vpnc 23605 [000] 0.000007: netif_receive_skb: dev=tun0 skbaddr=...
> thunderbird-bin 22435 [000] 0.001043: net_dev_queue: dev=tun0 skbaddr=...
> thunderbird-bin 22435 [000] 0.000012: net_dev_xmit: dev=tun0 skbaddr=...
>
> Signed-off-by: David Ahern <dsahern@gmail.com>
> ---
> tools/perf/Documentation/perf-script.txt | 2 +-
> tools/perf/builtin-script.c | 20 +++++++++++++++++++-
> 2 files changed, 20 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index db01786..4f996ab 100644
> --- a/tools/perf/Documentation/perf-script.txt
> +++ b/tools/perf/Documentation/perf-script.txt
> @@ -115,7 +115,7 @@ OPTIONS
> -f::
> --fields::
> Comma separated list of fields to print. Options are:
> - comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr.
> + comm, tid, pid, time, dt, cpu, event, trace, ip, sym, dso, addr.
> Field list can be prepended with the type, trace, sw or hw,
> to indicate to which event type the field list applies.
> e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 09024ec..541b30a 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -37,6 +37,7 @@ enum perf_output_field {
> PERF_OUTPUT_SYM = 1U << 8,
> PERF_OUTPUT_DSO = 1U << 9,
> PERF_OUTPUT_ADDR = 1U << 10,
> + PERF_OUTPUT_DT = 1U << 11,
> };
>
> struct output_option {
> @@ -54,6 +55,7 @@ struct output_option {
> {.str = "sym", .field = PERF_OUTPUT_SYM},
> {.str = "dso", .field = PERF_OUTPUT_DSO},
> {.str = "addr", .field = PERF_OUTPUT_ADDR},
> + {.str = "dt", .field = PERF_OUTPUT_DT},
> };
>
> /* default set to maintain compatibility with current format */
> @@ -207,6 +209,11 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
> PERF_OUTPUT_TIME))
> return -EINVAL;
>
> + if (PRINT_FIELD(DT) &&
> + perf_event_attr__check_stype(attr, PERF_SAMPLE_TIME, "DT",
> + PERF_OUTPUT_DT))
> + return -EINVAL;
> +
> if (PRINT_FIELD(CPU) &&
> perf_event_attr__check_stype(attr, PERF_SAMPLE_CPU, "CPU",
> PERF_OUTPUT_CPU))
> @@ -288,6 +295,17 @@ static void print_sample_start(struct perf_sample *sample,
> printf("%5lu.%06lu: ", secs, usecs);
> }
>
> + if (PRINT_FIELD(DT)) {
> + static u64 prev_sample_time;
> +
> + nsecs = prev_sample_time ? sample->time - prev_sample_time : 0;
> + prev_sample_time = sample->time;
> + secs = nsecs / NSECS_PER_SEC;
> + nsecs -= secs * NSECS_PER_SEC;
> + usecs = nsecs / NSECS_PER_USEC;
> + printf("%lu.%06lu: ", secs, usecs);
> + }
> +
> if (PRINT_FIELD(EVNAME)) {
> if (attr->type == PERF_TYPE_TRACEPOINT) {
> type = trace_parse_common_type(sample->raw_data);
> @@ -1080,7 +1098,7 @@ static const struct option options[] = {
> OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
> "Look for files with symbols relative to this directory"),
> OPT_CALLBACK('f', "fields", NULL, "str",
> - "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,addr",
> + "comma separated output fields prepend with 'type:'. Valid types: hw,sw,trace,raw. Fields: comm,tid,pid,time,dt,cpu,event,trace,ip,sym,dso,addr",
> parse_output_fields),
> OPT_STRING('c', "cpu", &cpu_list, "cpu", "list of cpus to profile"),
>
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