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| author | Ian Rogers <irogers@google.com> | 2020-06-11 02:58:22 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2020-06-22 22:28:09 +0300 |
| commit | 3e21a28a01e227726456a51933ed004c2df31850 (patch) | |
| tree | 3790a45c13e4492f2f2e99e09c3505c3eee5e885 /tools/perf/util/expr.l | |
| parent | afdd63f5933b3c970438e8ab6bb0cd9f392f3bf6 (diff) | |
| download | linux-3e21a28a01e227726456a51933ed004c2df31850.tar.xz | |
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/util/expr.l')
| -rw-r--r-- | tools/perf/util/expr.l | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/expr.l b/tools/perf/util/expr.l index f397bf8b1a48..298d86660a96 100644 --- a/tools/perf/util/expr.l +++ b/tools/perf/util/expr.l @@ -100,6 +100,7 @@ symbol ({spec}|{sym})+ } } +d_ratio { return D_RATIO; } max { return MAX; } min { return MIN; } if { return IF; } |