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perf trace: Add duration filter

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Example:

[acme@sandy linux]$ perf trace --duration 0.025 usleep 1
     2.221 ( 0.958 ms): 6724 execve(arg0: 140733557168278, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = -2
     3.690 ( 1.443 ms): 6724 execve(arg0: 140733557168295, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = 0
     3.979 ( 0.048 ms): 6724 open(filename: 208733843841, flags: 0, mode: 1                        ) = 3
     4.071 ( 0.075 ms): 6724 open(filename: 139744419925673, flags: 0, mode: 0                     ) = 3
     4.318 ( 0.056 ms): 6724 nanosleep(rqtp: 140734030404608, rmtp: 0                              ) = 0
[acme@sandy linux]$ perf trace --duration 0.100 usleep 1
     1.143 ( 1.021 ms): 6726 execve(arg0: 140736323962279, arg1: 140736323972752, arg2: 34926752, arg3: 140736323961824, arg4: 7955998171588342573, arg5: 6725) = 0
[acme@sandy linux]$

Cherry picked from tmp.perf/trace2 branch.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/n/tip-oslw2j2958we9qf0ctra4whd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-10-08 09:56:00 -03:00
parent 60c907abc6
commit ae9ed03579
2 changed files with 31 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
tools/perf/Documentation/perf-trace.txt
View File

@ -48,6 +48,9 @@ comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-
In per-thread mode with inheritance mode on (default), Events are captured only when
the thread executes on the designated CPUs. Default is to monitor all CPUs.
--duration:
Show only events that had a duration greater than N.M ms.
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script[1]

32
tools/perf/builtin-trace.c
View File

@ -100,8 +100,14 @@ struct trace {
struct machine host;
u64 base_time;
bool multiple_threads;
double duration_filter;
};
static bool trace__filter_duration(struct trace *trace, double t)
{
return t < (trace->duration_filter * NSEC_PER_MSEC);
}
static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
{
double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
@ -307,8 +313,10 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args);
if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
printf("%-70s\n", ttrace->entry_str);
if (!trace->duration_filter) {
trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
printf("%-70s\n", ttrace->entry_str);
}
} else
ttrace->entry_pending = true;
@ -333,8 +341,12 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
ttrace->exit_time = sample->time;
if (ttrace->entry_time)
if (ttrace->entry_time) {
duration = sample->time - ttrace->entry_time;
if (trace__filter_duration(trace, duration))
goto out;
} else if (trace->duration_filter)
goto out;
trace__fprintf_entry_head(trace, thread, duration, sample->time, stdout);
@ -358,7 +370,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
printf(") = %d", ret);
putchar('\n');
out:
ttrace->entry_pending = false;
return 0;
@ -495,6 +507,15 @@ out:
return err;
}
static int trace__set_duration(const struct option *opt, const char *str,
int unset __maybe_unused)
{
struct trace *trace = opt->value;
trace->duration_filter = atof(str);
return 0;
}
int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
{
const char * const trace_usage[] = {
@ -533,6 +554,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
"number of mmap data pages"),
OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
"user to profile"),
OPT_CALLBACK(0, "duration", &trace, "float",
"show only events with duration > N.M ms",
trace__set_duration),
OPT_END()
};
int err;