perf record: Support recording running/enabled time

Add an option to perf record to record running/enabled time for read
events, similar to what stat does.

This is useful to understand multiplexing problems.

Right now the report support is not great, but at least report -D
already supports it.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1424819620-16043-1-git-send-email-andi@firstfloor.org
[ Fixed the Documentation entry to match the OPT_BOOLEAN one ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2015-02-24 15:13:40 -08:00 committed by Arnaldo Carvalho de Melo
parent 506740654d
commit 85c273d2b6
4 changed files with 12 additions and 0 deletions

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@ -241,6 +241,9 @@ Capture machine state (registers) at interrupt, i.e., on counter overflows for
each sample. List of captured registers depends on the architecture. This option
is off by default.
--running-time::
Record running and enabled time for read events (:S)
SEE ALSO
--------
linkperf:perf-stat[1], linkperf:perf-list[1]

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@ -839,6 +839,8 @@ struct option __record_options[] = {
"use per-thread mmaps"),
OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs,
"Sample machine registers on interrupt"),
OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
"Record running/enabled time of read (:S) events"),
OPT_END()
};

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@ -53,6 +53,7 @@ struct record_opts {
bool sample_time;
bool period;
bool sample_intr_regs;
bool running_time;
unsigned int freq;
unsigned int mmap_pages;
unsigned int user_freq;

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@ -734,6 +734,12 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
if (opts->sample_transaction)
perf_evsel__set_sample_bit(evsel, TRANSACTION);
if (opts->running_time) {
evsel->attr.read_format |=
PERF_FORMAT_TOTAL_TIME_ENABLED |
PERF_FORMAT_TOTAL_TIME_RUNNING;
}
/*
* XXX see the function comment above
*