Bug 75141

It also happens on Ivybridge, Haswell, Baytrail and Broadwell.

Hello, I'm debuging the autobisect functionality in PRTS system, following are the bisect result I get from the system and I have manually verified that:
commit 8ebc02a54c22b7a83a34c923153861848183cd96
Author: Ben Widawsky 
Date: Fri Feb 21 13:15:35 2014 -0800

quick_dump: Add missed broadwell autodetect

Signed-off-by: Ben Widawsky

This is strange indeed. Does the igt commit you (and ptrs) bisected to _really_ make the difference on all platforms?

From a quick look it shouldn't affect the testcase at all ...

Also please check that you don't have anything else running (like X or other testcases) on the relevant testbox. The testcase shouldn't spuriously fail like that with just 1 leaked object (if it fails it tends to leak more than that and also fail sometimes later on).

(In reply to comment #3)
> This is strange indeed. Does the igt commit you (and ptrs) bisected to
> _really_ make the difference on all platforms?
> 
> From a quick look it shouldn't affect the testcase at all ...
> 
> Also please check that you don't have anything else running (like X or other
> testcases) on the relevant testbox. The testcase shouldn't spuriously fail
> like that with just 1 leaked object (if it fails it tends to leak more than
> that and also fail sometimes later on).

Double check the bisect commit is right.

To triple check. Reverting the offending igt commit with

$ git revert 8ebc02a54c22b7a83a34c923153861848183cd96

does indeed fix the testcase, i.e.

# ./gem_flink_race --run-subtest flink_close

on all platforms you've reported this bug against?

If this is true the universe seriously hates us ...

revert 8ebc02a54c22b7a83a34c923153861848183cd96
#./gem_flink_race --run-subtest flink_close
output
IGT-Version: 1.5-g9397936 (i686) (Linux: 3.14.0-rc5_drm-intel-nightly_3d805d_20140305+ i686)
leaked 0 objects
Subtest flink_close: SUCCESS

(In reply to comment #6)
> revert 8ebc02a54c22b7a83a34c923153861848183cd96
> #./gem_flink_race --run-subtest flink_close
> output
> IGT-Version: 1.5-g9397936 (i686) (Linux:
> 3.14.0-rc5_drm-intel-nightly_3d805d_20140305+ i686)
> leaked 0 objects
> Subtest flink_close: SUCCESS

Can you please retest whether latest i-g-t works?

It still fails.
output:
IGT-Version: 1.6-g8fe0c50 (x86_64) (Linux: 3.14.0-rc6_drm-intel-nightly_b18596_20140314+ x86_64)
leaked 1 objects
Test assertion failure function test_flink_close, file gem_flink_race.c:195:
Last errno: 2, No such file or directory
Failed assertion: obj_count == 0
Subtest flink_close: FAIL

Is this failing on the latest -nightly? PPGTT has been disabled.

It still fails.
output:
IGT-Version: 1.6-g7a81094 (x86_64) (Linux: 3.14.0-rc7_drm-intel-nightly_842955_20140325+ x86_64)
leaked 1 objects
Test assertion failure function test_flink_close, file gem_flink_race.c:196:
Last errno: 2, No such file or directory
Failed assertion: obj_count == 0
Subtest flink_close: FAIL

Tested on both snb and ivb with latest igt, works well for me. Please retest and make sure you don't have anything funny going on. Also _really_ strange that this fails across the board.

Test on IVB with latest igt and nightly kernel:
# ./gem_flink_race --run-subtest flink_close
IGT-Version: 1.6-g9048aa1 (x86_64) (Linux: 3.14.0-rc7_drm-intel-nightly_10c69a_20140328+ x86_64)
leaked 1 objects
Test assertion failure function test_flink_close, file gem_flink_race.c:196:
Last errno: 2, No such file or directory
Failed assertion: obj_count == 0
Subtest flink_close: FAIL
# ./gem_flink_race --run-subtest flink_close
IGT-Version: 1.6-g9048aa1 (x86_64) (Linux: 3.14.0-rc7_drm-intel-nightly_10c69a_20140328+ x86_64)
start new ssh tunnel and quit
leaked 0 objects
Subtest flink_close: SUCCESS