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perf stat: Remove --per-thread pid/tid limitation 

Currently, if we execute 'perf stat --per-thread' without specifying
pid/tid, perf will return error.

root@skl:/tmp# perf stat --per-thread
The --per-thread option is only available when monitoring via -p -t options.
    -p, --pid <pid>       stat events on existing process id
    -t, --tid <tid>       stat events on existing thread id

This patch removes this limitation. If no pid/tid specified, it returns
all threads (get threads from /proc).

Note that it doesn't support cpu_list yet so if it's a cpu_list case,
then skip.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1512482591-4646-11-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jin Yao 2017-12-05 22:03:10 +08:00 committed by Arnaldo Carvalho de Melo
parent 73c0ca1eee
commit 1d9f8d1b82
2 changed files with 22 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
tools/perf/builtin-stat.c
View File

@ -277,7 +277,7 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
attr->enable_on_exec = 1;
}
if (target__has_cpu(&target))
if (target__has_cpu(&target) && !target__has_per_thread(&target))
return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
return perf_evsel__open_per_thread(evsel, evsel_list->threads);
@ -340,7 +340,7 @@ static int read_counter(struct perf_evsel *counter)
int nthreads = thread_map__nr(evsel_list->threads);
int ncpus, cpu, thread;
if (target__has_cpu(&target))
if (target__has_cpu(&target) && !target__has_per_thread(&target))
ncpus = perf_evsel__nr_cpus(counter);
else
ncpus = 1;
@ -2743,12 +2743,16 @@ int cmd_stat(int argc, const char **argv)
run_count = 1;
}
if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
fprintf(stderr, "The --per-thread option is only available "
"when monitoring via -p -t options.\n");
parse_options_usage(NULL, stat_options, "p", 1);
parse_options_usage(NULL, stat_options, "t", 1);
goto out;
if ((stat_config.aggr_mode == AGGR_THREAD) &&
!target__has_task(&target)) {
if (!target.system_wide || target.cpu_list) {
fprintf(stderr, "The --per-thread option is only "
"available when monitoring via -p -t -a "
"options or only --per-thread.\n");
parse_options_usage(NULL, stat_options, "p", 1);
parse_options_usage(NULL, stat_options, "t", 1);
goto out;
}
}
/*
@ -2772,6 +2776,9 @@ int cmd_stat(int argc, const char **argv)
target__validate(&target);
if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
target.per_thread = true;
if (perf_evlist__create_maps(evsel_list, &target) < 0) {
if (target__has_task(&target)) {
pr_err("Problems finding threads of monitor\n");

7
tools/perf/util/target.h
View File

@ -64,6 +64,11 @@ static inline bool target__none(struct target *target)
return !target__has_task(target) && !target__has_cpu(target);
}
static inline bool target__has_per_thread(struct target *target)
{
return target->system_wide && target->per_thread;
}
static inline bool target__uses_dummy_map(struct target *target)
{
bool use_dummy = false;
@ -73,6 +78,8 @@ static inline bool target__uses_dummy_map(struct target *target)
else if (target__has_task(target) ||
(!target__has_cpu(target) && !target->uses_mmap))
use_dummy = true;
else if (target__has_per_thread(target))
use_dummy = true;
return use_dummy;
}