[Intel-gfx] [PATCH i-g-t v2 2/2] aux: Use IGT version of system() call to run rtcwake

[Imre Deak]

The clone() system call has difficulty to make progress if interrupted
frequently by the signal helper process. At least on an APL, like in the
Bugzilla ticket below, this can introduce minutes of overhead to a
single system() call (leading to a global CI timeout). To get rid of the
overhead suspend the signal helper process for the duration of the
system() call, which is provided already by igt_system().

Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=103160
Signed-off-by: Imre Deak <imre.deak at intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 lib/igt_aux.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 8dde9a12..ee53559c 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -794,7 +794,7 @@ static void suspend_via_rtcwake(enum igt_suspend_state state)
 	 */
 	snprintf(cmd, sizeof(cmd), "rtcwake -n -s %d -m %s " SQUELCH,
 		 delay, suspend_state_name[state]);
-	ret = system(cmd);
+	ret = igt_system(cmd);
 	igt_require_f(ret == 0, "rtcwake test failed with %i\n"
 		     "This failure could mean that something is wrong with "
 		     "the rtcwake tool or how your distro is set up.\n",
@@ -802,7 +802,7 @@ static void suspend_via_rtcwake(enum igt_suspend_state state)
 
 	snprintf(cmd, sizeof(cmd), "rtcwake -s %d -m %s ",
 		 delay, suspend_state_name[state]);
-	ret = system(cmd);
+	ret = igt_system(cmd);
 	igt_assert_f(ret == 0,
 		     "rtcwake failed with %i\n"
 		     "Check dmesg for further details.\n",
-- 
2.13.2