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Message-Id: <20241017175356.783793-5-irogers@google.com>
Date: Thu, 17 Oct 2024 10:53:53 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>,
Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
Yicong Yang <yangyicong@...ilicon.com>, Tim Chen <tim.c.chen@...ux.intel.com>,
Thomas Richter <tmricht@...ux.ibm.com>, Sumanth Korikkar <sumanthk@...ux.ibm.com>,
Weilin Wang <weilin.wang@...el.com>, linux-perf-users@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v5 4/7] perf stat: Drop metric-unit if unit is NULL
Avoid cases like:
```
$ perf stat -a -M topdownl1 -j -I 1000
...
{"interval" : 11.127757275, "counter-value" : "85715898.000000", "unit" : "", "event" : "IDQ.MITE_UOPS", "event-runtime" : 988376123, "pcnt-running" : 100.00, "metric-value" : "0.000000", "metric-unit" : "(null)"}
...
```
If there is no unit then drop the metric-value too as:
Suggested-by: Tim Chen <tim.c.chen@...ux.intel.com>
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/util/stat-display.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index a137b377efa4..c6d33010ed22 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -471,8 +471,8 @@ static void print_metric_json(struct perf_stat_config *config __maybe_unused,
struct outstate *os = ctx;
FILE *out = os->fh;
- fprintf(out, "\"metric-value\" : \"%f\", ", val);
- fprintf(out, "\"metric-unit\" : \"%s\"", unit);
+ if (unit)
+ fprintf(out, "\"metric-value\" : \"%f\", \"metric-unit\" : \"%s\"", val, unit);
if (!config->metric_only)
fprintf(out, "}");
}
--
2.47.0.105.g07ac214952-goog
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