Commit ae9ed035 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf trace: Add duration filter 

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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 60c907ab

tools/perf/Documentation/perf-trace.txt

+3 −0
Original line number Diff line number Diff line
@@ -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]

tools/perf/builtin-trace.c

+28 −4
Original line number Diff line number Diff line
@@ -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")) {

		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;

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