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perf stat: Support metrics in --per-core/socket mode 

Enable metrics printing in --per-core / --per-socket mode. We need to
save the shadow metrics in a unique place. Always use the first CPU in
the aggregation. Then use the same CPU to retrieve the shadow value
later.

Example output:

  % perf stat --per-core -a ./BC1s

   Performance counter stats for 'system wide':

  S0-C0 2   2966.020381 task-clock (msec) #   2.004 CPUs utilized  (100.00%)
  S0-C0 2            49 context-switches  #   0.017 K/sec          (100.00%)
  S0-C0 2             4 cpu-migrations    #   0.001 K/sec          (100.00%)
  S0-C0 2           467 page-faults       #   0.157 K/sec
  S0-C0 2 4,599,061,773 cycles            #   1.551 GHz            (100.00%)
  S0-C0 2 9,755,886,883 instructions      #   2.12  insn per cycle (100.00%)
  S0-C0 2 1,906,272,125 branches          # 642.704 M/sec          (100.00%)
  S0-C0 2    81,180,867 branch-misses     #   4.26% of all branches
  S0-C1 2   2965.995373 task-clock (msec) #   2.003 CPUs utilized  (100.00%)
  S0-C1 2            62 context-switches  #   0.021 K/sec          (100.00%)
  S0-C1 2             8 cpu-migrations    #   0.003 K/sec          (100.00%)
  S0-C1 2           281 page-faults       #   0.095 K/sec
  S0-C1 2     6,347,290 cycles            #   0.002 GHz            (100.00%)
  S0-C1 2     4,654,156 instructions      #   0.73  insn per cycle (100.00%)
  S0-C1 2       947,121 branches          #   0.319 M/sec          (100.00%)
  S0-C1 2        37,322 branch-misses     #   3.94% of all branches

         1.480409747 seconds time elapsed

v2: Rebase to older patches
v3: Document shadow cpus. Fix aggr_get_id argument. Fix -A shadows (Jiri)

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1456785386-19481-4-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Andi Kleen 2016-02-29 14:36:22 -08:00 committed by Arnaldo Carvalho de Melo
parent 92a61f6412
commit 44d49a6002
2 changed files with 63 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
tools/perf/builtin-stat.c
View File

@ -740,6 +740,8 @@ struct outstate {
bool newline;
const char *prefix;
int nfields;
int id, nr;
struct perf_evsel *evsel;
};
#define METRIC_LEN 35
@ -755,12 +757,9 @@ static void do_new_line_std(struct outstate *os)
{
fputc('\n', os->fh);
fputs(os->prefix, os->fh);
aggr_printout(os->evsel, os->id, os->nr);
if (stat_config.aggr_mode == AGGR_NONE)
fprintf(os->fh, " ");
if (stat_config.aggr_mode == AGGR_CORE)
fprintf(os->fh, " ");
if (stat_config.aggr_mode == AGGR_SOCKET)
fprintf(os->fh, " ");
fprintf(os->fh, " ");
}
@ -798,6 +797,7 @@ static void new_line_csv(void *ctx)
fputc('\n', os->fh);
if (os->prefix)
fprintf(os->fh, "%s%s", os->prefix, csv_sep);
aggr_printout(os->evsel, os->id, os->nr);
for (i = 0; i < os->nfields; i++)
fputs(csv_sep, os->fh);
}
@ -855,6 +855,28 @@ static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
}
static int first_shadow_cpu(struct perf_evsel *evsel, int id)
{
int i;
if (!aggr_get_id)
return 0;
if (stat_config.aggr_mode == AGGR_NONE)
return id;
if (stat_config.aggr_mode == AGGR_GLOBAL)
return 0;
for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
int cpu2 = perf_evsel__cpus(evsel)->map[i];
if (aggr_get_id(evsel_list->cpus, cpu2) == id)
return cpu2;
}
return 0;
}
static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
{
FILE *output = stat_config.output;
@ -891,7 +913,10 @@ static void printout(int id, int nr, struct perf_evsel *counter, double uval,
struct perf_stat_output_ctx out;
struct outstate os = {
.fh = stat_config.output,
.prefix = prefix ? prefix : ""
.prefix = prefix ? prefix : "",
.id = id,
.nr = nr,
.evsel = counter,
};
print_metric_t pm = print_metric_std;
void (*nl)(void *);
@ -958,16 +983,37 @@ static void printout(int id, int nr, struct perf_evsel *counter, double uval,
}
perf_stat__print_shadow_stats(counter, uval,
stat_config.aggr_mode == AGGR_GLOBAL ? 0 :
cpu_map__id_to_cpu(id),
first_shadow_cpu(counter, id),
&out);
if (!csv_output) {
print_noise(counter, noise);
print_running(run, ena);
}
}
static void aggr_update_shadow(void)
{
int cpu, s2, id, s;
u64 val;
struct perf_evsel *counter;
for (s = 0; s < aggr_map->nr; s++) {
id = aggr_map->map[s];
evlist__for_each(evsel_list, counter) {
val = 0;
for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
s2 = aggr_get_id(evsel_list->cpus, cpu);
if (s2 != id)
continue;
val += perf_counts(counter->counts, cpu, 0)->val;
}
val = val * counter->scale;
perf_stat__update_shadow_stats(counter, &val,
first_shadow_cpu(counter, id));
}
}
}
static void print_aggr(char *prefix)
{
FILE *output = stat_config.output;
@ -979,6 +1025,8 @@ static void print_aggr(char *prefix)
if (!(aggr_map || aggr_get_id))
return;
aggr_update_shadow();
for (s = 0; s < aggr_map->nr; s++) {
id = aggr_map->map[s];
evlist__for_each(evsel_list, counter) {

7
tools/perf/util/stat-shadow.c
View File

@ -14,6 +14,13 @@ enum {
#define NUM_CTX CTX_BIT_MAX
/*
* AGGR_GLOBAL: Use CPU 0
* AGGR_SOCKET: Use first CPU of socket
* AGGR_CORE: Use first CPU of core
* AGGR_NONE: Use matching CPU
* AGGR_THREAD: Not supported?
*/
static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
static struct stats runtime_cycles_stats[NUM_CTX][MAX_NR_CPUS];
static struct stats runtime_stalled_cycles_front_stats[NUM_CTX][MAX_NR_CPUS];