redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

perf stat: Separate counters reading and processing 

Separating counters reading and processing so we could use the
processing part in following patches.

Using simple reading via perf_evsel__read function to read counters now,
because part of the processing was in the read_cb callback.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1435310967-14570-16-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Jiri Olsa 2015-06-26 11:29:20 +02:00 committed by Arnaldo Carvalho de Melo
parent 106a94a0f8
commit 3b3eb04451
1 changed files with 39 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
tools/perf/builtin-stat.c
View File

@ -217,8 +217,9 @@ static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
return 0;
}
static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count)
static int
process_counter_values(struct perf_evsel *evsel, int cpu, int thread,
struct perf_counts_values *count)
{
struct perf_counts_values *aggr = &evsel->counts->aggr;
static struct perf_counts_values zero;
@ -239,7 +240,6 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
if (!evsel->snapshot)
perf_evsel__compute_deltas(evsel, cpu, thread, count);
perf_counts_values__scale(count, scale, NULL);
*perf_counts(evsel->counts, cpu, thread) = *count;
if (aggr_mode == AGGR_NONE)
perf_stat__update_shadow_stats(evsel, count->values, cpu);
break;
@ -256,23 +256,41 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
return 0;
}
static int read_counter(struct perf_evsel *counter);
static int process_counter_maps(struct perf_evsel *counter)
{
int nthreads = thread_map__nr(counter->threads);
int ncpus = perf_evsel__nr_cpus(counter);
int cpu, thread;
/*
* Read out the results of a single counter:
* aggregate counts across CPUs in system-wide mode
*/
static int read_counter_aggr(struct perf_evsel *counter)
if (counter->system_wide)
nthreads = 1;
for (thread = 0; thread < nthreads; thread++) {
for (cpu = 0; cpu < ncpus; cpu++) {
if (process_counter_values(counter, cpu, thread,
perf_counts(counter->counts, cpu, thread)))
return -1;
}
}
return 0;
}
static int process_counter(struct perf_evsel *counter)
{
struct perf_counts_values *aggr = &counter->counts->aggr;
struct perf_stat *ps = counter->priv;
u64 *count = counter->counts->aggr.values;
int i;
int i, ret;
aggr->val = aggr->ena = aggr->run = 0;
if (read_counter(counter))
return -1;
ret = process_counter_maps(counter);
if (ret)
return ret;
if (aggr_mode != AGGR_GLOBAL)
return 0;
if (!counter->snapshot)
perf_evsel__compute_deltas(counter, -1, -1, aggr);
@ -315,7 +333,10 @@ static int read_counter(struct perf_evsel *counter)
for (thread = 0; thread < nthreads; thread++) {
for (cpu = 0; cpu < ncpus; cpu++) {
if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
struct perf_counts_values *count;
count = perf_counts(counter->counts, cpu, thread);
if (perf_evsel__read(counter, cpu, thread, count))
return -1;
}
}
@ -332,10 +353,11 @@ static void read_counters(bool close)
ps = counter->priv;
memset(ps->res_stats, 0, sizeof(ps->res_stats));
if (aggr_mode == AGGR_GLOBAL)
read_counter_aggr(counter);
else
read_counter(counter);
if (read_counter(counter))
pr_warning("failed to read counter %s\n", counter->name);
if (process_counter(counter))
pr_warning("failed to process counter %s\n", counter->name);
if (close) {
perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),