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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-15 10:05:19 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-07-15 10:08:29 -0300 |
| commit | 8811e8ea14c1056b09c794c67836b8a84584ddef (patch) | |
| tree | 6c4f9c7b74450593c4063c9545e84e641a3d22f9 /tools/perf/perf.c | |
| parent | 8c98abff43616a2a9c208189f86d32cefafbe708 (diff) | |
| download | linux-8811e8ea14c1056b09c794c67836b8a84584ddef.tar.bz2 | |
perf tools: Just pr_debug() about not being able to read cacheline_size
So far the cacheline_size is only useful for the "dcacheline" --sort
order, i.e. if that is not used, which is the norm, then the user
shouldn't care that he is running this, say, on an Android system where
sysconf(_SC_LEVEL1_DCACHE_LINESIZE) and the
/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size sysfs file
isn't available.
An upcoming patch will emit an warning only for "--sort ...,dcacheline,...".
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Chris Phlipot <cphlipot0@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-580cnkvftunyvt9n7unsholi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.c')
| -rw-r--r-- | tools/perf/perf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/perf.c b/tools/perf/perf.c index 4b2ff021434c..64c06961bfe4 100644 --- a/tools/perf/perf.c +++ b/tools/perf/perf.c @@ -503,7 +503,7 @@ void pthread__unblock_sigwinch(void) static void cache_line_size(int *cacheline_sizep) { if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep)) - perror("cannot determine cache line size"); + pr_debug("cannot determine cache line size"); } #endif |