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| author | Ian Rogers <irogers@google.com> | 2020-06-11 01:58:22 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-06-22 21:28:09 +0200 |
| commit | 3e21a28a01e227726456a51933ed004c2df31850 (patch) | |
| tree | 3790a45c13e4492f2f2e99e09c3505c3eee5e885 /tools/perf/tests | |
| parent | perf script: Fixup some evsel/evlist method names (diff) | |
| download | linux-3e21a28a01e227726456a51933ed004c2df31850.tar.xz linux-3e21a28a01e227726456a51933ed004c2df31850.zip | |
perf expr: Add d_ratio operation
d_ratio avoids division by 0 yielding infinity, such as when a counter
doesn't get scheduled. An example usage is:
{
"BriefDescription": "DCache L1 misses",
"MetricExpr": "d_ratio(MEM_LOAD_RETIRED.L1_MISS, MEM_LOAD_RETIRED.L1_HIT + MEM_LOAD_RETIRED.L1_MISS + MEM_LOAD_RETIRED.FB_HIT)",
"MetricGroup": "DCache;DCache_L1",
"MetricName": "DCache_L1_Miss",
"ScaleUnit": "100%",
}
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200610235823.52557-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/tests')
| -rw-r--r-- | tools/perf/tests/expr.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/tests/expr.c b/tools/perf/tests/expr.c index 1cb02ca2b15f..c4877b36ab58 100644 --- a/tools/perf/tests/expr.c +++ b/tools/perf/tests/expr.c @@ -39,6 +39,8 @@ int test__expr(struct test *t __maybe_unused, int subtest __maybe_unused) ret |= test(&ctx, "1+1 if 3*4 else 0", 2); ret |= test(&ctx, "1.1 + 2.1", 3.2); ret |= test(&ctx, ".1 + 2.", 2.1); + ret |= test(&ctx, "d_ratio(1, 2)", 0.5); + ret |= test(&ctx, "d_ratio(2.5, 0)", 0); if (ret) return ret; |