1 files changed, 20 insertions, 1 deletions

diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index 1019bbc5dbd8..99ab52165680 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -38,7 +38,26 @@ void perf_set_multithreaded(void)
 }
 
 unsigned int page_size;
-int cacheline_size;
+
+#ifdef _SC_LEVEL1_DCACHE_LINESIZE
+#define cache_line_size(cacheline_sizep) *cacheline_sizep = sysconf(_SC_LEVEL1_DCACHE_LINESIZE)
+#else
+static void cache_line_size(int *cacheline_sizep)
+{
+        if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
+                pr_debug("cannot determine cache line size");
+}
+#endif
+
+int cacheline_size(void)
+{
+        static int size;
+
+        if (!size)
+                cache_line_size(&size);
+
+        return size;
+}
 
 int sysctl_perf_event_max_stack = PERF_MAX_STACK_DEPTH;
 int sysctl_perf_event_max_contexts_per_stack = PERF_MAX_CONTEXTS_PER_STACK;