Messages in this thread | | | Date | Tue, 1 Mar 2016 19:52:50 +0100 | From | Andi Kleen <> | Subject | Re: [PATCH 3/7] perf, tools, stat: Support metrics in --per-core/socket mode |
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On Tue, Mar 01, 2016 at 01:31:49PM +0100, Jiri Olsa wrote: > On Mon, Feb 29, 2016 at 02:36:22PM -0800, Andi Kleen wrote: > > From: Andi Kleen <ak@linux.intel.com> > > > > 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> > > --- > > tools/perf/builtin-stat.c | 61 +++++++++++++++++++++++++++++++++++++------ > > tools/perf/util/stat-shadow.c | 7 +++++ > > 2 files changed, 60 insertions(+), 8 deletions(-) > > > > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c > > index 2ffb822..c79e571 100644 > > --- a/tools/perf/builtin-stat.c > > +++ b/tools/perf/builtin-stat.c > > @@ -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, " "); > > any reason for this extra space for AGGR_NONE?
It's just to avoid special cases for NONE elsewhere, as it has the same alignment. This was there before.
-Andi
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