diff options
| author | German Gomez <german.gomez@arm.com> | 2023-03-20 15:15:08 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-03-20 19:28:21 -0300 |
| commit | ea15483e7c55f73809cd9e208fff511966539ee5 (patch) | |
| tree | 8b4221249351637e01ddf6df8ecd287a64cf59d7 /tools/perf/util/hist.c | |
| parent | 03a6c16ebf0162b57acd16c2dd2baa79d8db2a97 (diff) | |
perf report: Add 'simd' sort field
Add 'simd' sort field to visualize SIMD ops in 'perf report'.
Rows are labeled with the SIMD ISA, and the type of predicate (if any):
- [p] partial predicate
- [e] empty predicate (no elements in the vector being used)
Example with Arm SPE and SVE (Scalable Vector Extension):
#include <arm_sve.h>
double src[1025], dst[1025];
int main(void) {
svfloat64_t vc = svdup_f64(1);
for(;;)
for(int i = 0; i < 1025; i += svcntd())
{
svbool_t pg = svwhilelt_b64(i, 1025);
svfloat64_t vsrc = svld1(pg, &src[i]);
svfloat64_t vdst = svadd_x(pg, vsrc, vc);
svst1(pg, &dst[i], vdst);
}
return 0;
}
... compiled using "gcc-11 -march=armv8-a+sve -O3"
Profiling on a platform that implements FEAT_SVE and FEAT_SPEv1p1:
$ perf record -e arm_spe_0// -- ./a.out
$ perf report --itrace=i1i -s overhead,pid,simd,sym
Overhead Pid:Command Simd Symbol
........ ................ ....... ......................
53.76% 10758:program [.] main
46.14% 10758:program [.] SVE [.] main
0.09% 10758:program [p] SVE [.] main
The report shows 0.09% of the sampled SVE operations use partial
predicates due to src and dst arrays not being multiples of the vector
register lengths.
Signed-off-by: German Gomez <german.gomez@arm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anshuman.Khandual@arm.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230320151509.1137462-2-james.clark@arm.com
Signed-off-by: James Clark <james.clark@arm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/hist.c')
| -rw-r--r-- | tools/perf/util/hist.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index 3670136a0074..0c11f50abfec 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -745,6 +745,7 @@ __hists__add_entry(struct hists *hists, .weight = sample->weight, .ins_lat = sample->ins_lat, .p_stage_cyc = sample->p_stage_cyc, + .simd_flags = sample->simd_flags, }, *he = hists__findnew_entry(hists, &entry, al, sample_self); if (!hists->has_callchains && he && he->callchain_size != 0) |