From: Arnaldo Carvalho de Melo <a...@redhat.com>
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 <dsah...@gmail.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Mike Galbraith <efa...@gmx.de>
Cc: Namhyung Kim <namhy...@gmail.com>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Stephane Eranian <eran...@google.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Link: http://lkml.kernel.org/n/tip-oslw2j2958we9qf0ctra4...@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
tools/perf/Documentation/perf-trace.txt | 3 +++
tools/perf/builtin-trace.c | 32 +++++++++++++++++++++++++++----
2 files changed, 31 insertions(+), 4 deletions(-)
diff --git a/tools/perf/Documentation/perf-trace.txt
b/tools/perf/Documentation/perf-trace.txt
index 3a2ae37..38d4b68 100644
--- a/tools/perf/Documentation/perf-trace.txt
+++ b/tools/perf/Documentation/perf-trace.txt
@@ -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]
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index ddb6e37..82ffa6c 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -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;
--
1.7.9.2.358.g22243
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