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perf record: Support recording running/enabled time

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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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3
tools/perf/Documentation/perf-record.txt
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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 each sample. List of captured registers depends on the architecture. This option
is off by default. is off by default.
--running-time::
Record running and enabled time for read events (:S)
SEE ALSO SEE ALSO
-------- --------
linkperf:perf-stat[1], linkperf:perf-list[1] linkperf:perf-stat[1], linkperf:perf-list[1]

2
tools/perf/builtin-record.c
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@ -839,6 +839,8 @@ struct option __record_options[] = {
"use per-thread mmaps"), "use per-thread mmaps"),
OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs, OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs,
"Sample machine registers on interrupt"), "Sample machine registers on interrupt"),
OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
"Record running/enabled time of read (:S) events"),
OPT_END() OPT_END()
}; };

1
tools/perf/perf.h
View File

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

6
tools/perf/util/evsel.c
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@ -734,6 +734,12 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
if (opts->sample_transaction) if (opts->sample_transaction)
perf_evsel__set_sample_bit(evsel, 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 * XXX see the function comment above
* *