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perf timechart: Get number of CPUs from perf header

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Print all CPUs, even if there were no events (use perf header to get
number of CPUs).

This is required to support topology in the next patch.

Signed-off-by: Stanislav Fomichev <stfomichev@yandex-team.ru>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ramkumar Ramachandra <artagnon@gmail.com>
Link: http://lkml.kernel.org/r/1385995056-20158-4-git-send-email-stfomichev@yandex-team.ru
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Stanislav Fomichev 2013-12-02 18:37:35 +04:00 committed by Arnaldo Carvalho de Melo
parent de996228de
commit 58b9a18ecd
1 changed files with 26 additions and 6 deletions
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32
tools/perf/builtin-timechart.c
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@ -531,12 +531,10 @@ static int process_sample_event(struct perf_tool *tool,
tchart->last_time = sample->time;
}
if (sample->cpu > tchart->numcpus)
tchart->numcpus = sample->cpu;
if (evsel->handler != NULL) {
tracepoint_handler f = evsel->handler;
return f(tchart, evsel, sample, cat_backtrace(event, sample, machine));
return f(tchart, evsel, sample,
cat_backtrace(event, sample, machine));
}
return 0;
@ -1038,8 +1036,6 @@ static void write_svg_file(struct timechart *tchart, const char *filename)
int count;
int thresh = TIME_THRESH;
tchart->numcpus++;
if (tchart->power_only)
tchart->proc_num = 0;
@ -1069,6 +1065,25 @@ static void write_svg_file(struct timechart *tchart, const char *filename)
svg_close();
}
static int process_header(struct perf_file_section *section __maybe_unused,
struct perf_header *ph,
int feat,
int fd __maybe_unused,
void *data)
{
struct timechart *tchart = data;
switch (feat) {
case HEADER_NRCPUS:
tchart->numcpus = ph->env.nr_cpus_avail;
break;
default:
break;
}
return 0;
}
static int __cmd_timechart(struct timechart *tchart, const char *output_name)
{
const struct perf_evsel_str_handler power_tracepoints[] = {
@ -1094,6 +1109,11 @@ static int __cmd_timechart(struct timechart *tchart, const char *output_name)
if (session == NULL)
return -ENOMEM;
(void)perf_header__process_sections(&session->header,
perf_data_file__fd(session->file),
tchart,
process_header);
if (!perf_session__has_traces(session, "timechart record"))
goto out_delete;