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

perf stat: Add support for per-pkg counters 

The .per-pkg file indicates that all but one value per socket should be
discarded. Adding the logic of skipping the rest of the socket once
first value was read.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1416562275-12404-11-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
hifive-unleashed-5.1
Jiri Olsa 2014-11-21 10:31:14 +01:00 committed by Arnaldo Carvalho de Melo
parent a5a7fd76b5
commit 779d0b997e
2 changed files with 50 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
tools/perf/builtin-stat.c
View File

@ -388,10 +388,56 @@ static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
update_stats(&runtime_itlb_cache_stats[0], count[0]);
}
static void zero_per_pkg(struct perf_evsel *counter)
{
if (counter->per_pkg_mask)
memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
}
static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
{
unsigned long *mask = counter->per_pkg_mask;
struct cpu_map *cpus = perf_evsel__cpus(counter);
int s;
*skip = false;
if (!counter->per_pkg)
return 0;
if (cpu_map__empty(cpus))
return 0;
if (!mask) {
mask = zalloc(MAX_NR_CPUS);
if (!mask)
return -ENOMEM;
counter->per_pkg_mask = mask;
}
s = cpu_map__get_socket(cpus, cpu);
if (s < 0)
return -1;
*skip = test_and_set_bit(s, mask) == 1;
return 0;
}
static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
struct perf_counts_values *count)
{
struct perf_counts_values *aggr = &evsel->counts->aggr;
static struct perf_counts_values zero;
bool skip = false;
if (check_per_pkg(evsel, cpu, &skip)) {
pr_err("failed to read per-pkg counter\n");
return -1;
}
if (skip)
count = &zero;
switch (aggr_mode) {
case AGGR_CORE:
@ -465,6 +511,9 @@ static int read_counter(struct perf_evsel *counter)
if (counter->system_wide)
nthreads = 1;
if (counter->per_pkg)
zero_per_pkg(counter);
for (thread = 0; thread < nthreads; thread++) {
for (cpu = 0; cpu < ncpus; cpu++) {
if (perf_evsel__read_cb(counter, cpu, thread, read_cb))

1
tools/perf/util/evsel.h
View File

@ -93,6 +93,7 @@ struct perf_evsel {
bool system_wide;
bool tracking;
bool per_pkg;
unsigned long *per_pkg_mask;
/* parse modifier helper */
int exclude_GH;
int nr_members;