From: Namhyung Kim <namhyung....@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....@lge.com>
Cc: David Ahern <dsah...@gmail.com>
Signed-off-by: Namhyung Kim <namhy...@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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