From: Arnaldo Carvalho de Melo <[email protected]> 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 <[email protected]> Cc: Chris Phlipot <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/perf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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 -- 2.7.4
