perf diff: Change the default sort order to "dso,symbol"
This is a more intuitive / more meaningful default:
$ perf diff | head -8
9.02% +1.00% libc-2.10.1.so [.] _IO_vfprintf_internal
2.91% -1.00% [kernel] [k] __kmalloc
2.85% -1.00% [kernel] [k] ext4_htree_store_dirent
1.99% -1.00% [kernel] [k] _atomic_dec_and_lock
2.44% [kernel]
$
Suggested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260979793-1981-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 66f100d..4d33b55 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -18,6 +18,7 @@
static char const *input_old = "perf.data.old",
*input_new = "perf.data";
+static char diff__default_sort_order[] = "dso,symbol";
static int force;
static bool show_displacement;
@@ -220,6 +221,7 @@
int cmd_diff(int argc, const char **argv, const char *prefix __used)
{
+ sort_order = diff__default_sort_order;
argc = parse_options(argc, argv, options, diff_usage, 0);
if (argc) {
if (argc > 2)