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authorArnaldo Carvalho de Melo <acme@redhat.com>2016-07-15 10:05:19 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-07-15 10:08:29 -0300
commit8811e8ea14c1056b09c794c67836b8a84584ddef (patch)
tree6c4f9c7b74450593c4063c9545e84e641a3d22f9 /tools/perf/perf.c
parent8c98abff43616a2a9c208189f86d32cefafbe708 (diff)
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.c2
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