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| author |  He Zhe <zhe.he@windriver.com>
| 2024-05-07 14:50:26 +0800 |
|---|---|---|
| committer |  Arnaldo Carvalho de Melo <acme@redhat.com>
| 2024-05-07 12:44:02 -0300 |
| commit | d9180e23fbfa3875424d3a6b28b71b072862a52a (patch) | |
| tree | 8878dfa7e63eb9d10661a529ab33ee9311314a5e /tools/perf | |
| parent | perf probe: Use zfree() to avoid possibly accessing dangling pointers (diff) | |
| download | linux-d9180e23fbfa3875424d3a6b28b71b072862a52a.tar.gz linux-d9180e23fbfa3875424d3a6b28b71b072862a52a.tar.bz2 linux-d9180e23fbfa3875424d3a6b28b71b072862a52a.zip | |
perf bench internals inject-build-id: Fix trap divide when collecting just one DSO
'perf bench internals inject-build-id' suffers from the following error when
only one DSO is collected.
# perf bench internals inject-build-id -v
Collected 1 DSOs
traps: internals-injec[2305] trap divide error
ip:557566ba6394 sp:7ffd4de97fe0 error:0 in perf[557566b2a000+23d000]
Build-id injection benchmark
Iteration #1
Floating point exception
This patch removes the unnecessary minus one from the divisor which also
corrects the randomization range.
Signed-off-by: He Zhe <zhe.he@windriver.com>
Fixes: 0bf02a0d80427f26 ("perf bench: Add build-id injection benchmark")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240507065026.2652929-1-zhe.he@windriver.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/bench/inject-buildid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/bench/inject-buildid.c b/tools/perf/bench/inject-buildid.c index 49331743c743..a759eb2328be 100644 --- a/tools/perf/bench/inject-buildid.c +++ b/tools/perf/bench/inject-buildid.c @@ -362,7 +362,7 @@ static int inject_build_id(struct bench_data *data, u64 *max_rss) return -1; for (i = 0; i < nr_mmaps; i++) { - int idx = rand() % (nr_dsos - 1); + int idx = rand() % nr_dsos; struct bench_dso *dso = &dsos[idx]; u64 timestamp = rand() % 1000000; |