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authorIngo Molnar <mingo@kernel.org>2013-07-23 07:37:33 (GMT)
committerIngo Molnar <mingo@kernel.org>2013-07-23 07:37:33 (GMT)
commit4f16d61f80d77a7c44bdf0b9ceccdb304e4c890f (patch)
treec01080efc6f4c25114e3e9183de8fcce241da9d6 /tools/perf/bench/mem-memcpy.c
parentea8596bb2d8d37957f3e92db9511c50801689180 (diff)
parentf9ea55d0ddf66ed030b2a478625cd5792d30df16 (diff)
downloadlinux-fsl-qoriq-4f16d61f80d77a7c44bdf0b9ceccdb304e4c890f.tar.xz
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: * Fix memcpy benchmark for large sizes, from Andi Kleen. * Support callchain sorting based on addresses, from Andi Kleen * Move weight back to common sort keys, From Andi Kleen. * Fix named threads support in 'perf script', from David Ahern. * Handle ENODEV on default cycles event, fix from David Ahern. * More install tests, from Jiri Olsa. * Fix build with perl 5.18, from Kirill A. Shutemov. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/bench/mem-memcpy.c')
-rw-r--r--tools/perf/bench/mem-memcpy.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c
index 25fd3f1..8cdca43 100644
--- a/tools/perf/bench/mem-memcpy.c
+++ b/tools/perf/bench/mem-memcpy.c
@@ -117,6 +117,8 @@ static void alloc_mem(void **dst, void **src, size_t length)
*src = zalloc(length);
if (!*src)
die("memory allocation failed - maybe length is too large?\n");
+ /* Make sure to always replace the zero pages even if MMAP_THRESH is crossed */
+ memset(*src, 0, length);
}
static u64 do_memcpy_cycle(memcpy_t fn, size_t len, bool prefault)