Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH v2 2/4] perf script: Add --time-filter option | Date | Mon, 3 Jun 2013 13:44:11 +0900 |
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From: Namhyung Kim <namhyung.kim@lge.com>
The --time-filter option is for limiting samples within a range of time. A time range looks like <time1>-<time2> and at most one of them can be omitted. For instance:
$ perf script --time-filter -2178446.12 ... xchat 1772 [002] 2178446.070330: sched:sched_switch: prev_comm=xchat prev_pid=177 swapper 0 [002] 2178446.070338: power:cpu_idle: state=4 cpu_id=2 swapper 0 [001] 2178446.091952: sched:sched_wakeup: comm=synergys pid=1488 prio= swapper 0 [001] 2178446.091958: power:cpu_idle: state=4294967295 cpu_id=1 swapper 0 [001] 2178446.091970: sched:sched_switch: prev_comm=swapper/1 prev_pid synergys 1488 [001] 2178446.091995: sched:sched_switch: prev_comm=synergys prev_pid= swapper 0 [001] 2178446.092003: power:cpu_idle: state=4 cpu_id=1 swapper 0 [001] 2178446.116997: sched:sched_wakeup: comm=synergys pid=1488 prio= swapper 0 [001] 2178446.117004: power:cpu_idle: state=4294967295 cpu_id=1 swapper 0 [001] 2178446.117016: sched:sched_switch: prev_comm=swapper/1 prev_pid synergys 1488 [001] 2178446.117040: sched:sched_switch: prev_comm=synergys prev_pid= swapper 0 [001] 2178446.117048: power:cpu_idle: state=4 cpu_id=1
Above example only displays samples which have a timestamp before 2178446.120000.
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/perf/Documentation/perf-script.txt | 7 +++++++ tools/perf/builtin-script.c | 32 ++++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index e9cbfcddfa3f..c4994c5f27ff 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -203,6 +203,13 @@ OPTIONS --show-kernel-path:: Try to resolve the path of [kernel.kallsyms] +-X:: +--time-filter:: + Display samples within a range of time only. A time range can be given + like 'time1-time2' and treated as a start time and end time + respectively. The time format is like "<sec>.<usec>". Either of time1 + or time2 can be omitted. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-script-perl[1], diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index 92d4658f56fb..d598765e59cb 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -28,6 +28,13 @@ static bool system_wide; static const char *cpu_list; static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS); +struct time_range { + u64 start; + u64 end; +}; + +static struct time_range trange; + enum perf_output_field { PERF_OUTPUT_COMM = 1U << 0, PERF_OUTPUT_TID = 1U << 1, @@ -510,6 +517,12 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused, if (cpu_list && !test_bit(sample->cpu, cpu_bitmap)) return 0; + if (trange.start && trange.start > sample->time) + return 0; + + if (trange.end && trange.end < sample->time) + return 0; + scripting_ops->process_event(event, sample, evsel, machine, &al); evsel->hists.stats.total_period += sample->period; @@ -1236,6 +1249,23 @@ static int have_cmd(int argc, const char **argv) return 0; } +static int +parse_time_filter(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct time_range *time_range = opt->value; + char *sep = strchr(str, '-'); + + if (sep == NULL) + return parse_nsec_time(str, &time_range->start); + else if (sep == str) + return parse_nsec_time(++str, &time_range->end); + + *sep++ = '\0'; + return parse_nsec_time(str, &time_range->start) || + parse_nsec_time(sep, &time_range->end); +} + int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) { bool show_full_info = false; @@ -1286,6 +1316,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused) "display extended information from perf.data file"), OPT_BOOLEAN('\0', "show-kernel-path", &symbol_conf.show_kernel_path, "Show the path of [kernel.kallsyms]"), + OPT_CALLBACK('X', "time-filter", &trange, "time[-time]", + "Only display entries in the time range", parse_time_filter), OPT_END() }; const char * const script_usage[] = { -- 1.7.11.7
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