Bug 97557

Created attachment 126155 [details]
IGTuotput

(In reply to Luis Botello from comment #0)
> Description:
> ======================================
> gem_exec_flus/batch* tests fail due to Failed assertion:
> intel_detect_and_clear_missed_interrupts(fd) == 0

This was meant to gem_sync *render!

In future can you include the next line after this assertion that shows which interrupts were missed (the actual values to the assertion that fail).

*** Bug 97554 has been marked as a duplicate of this bug. ***

What's the frequency of failure? (The gem_exec_flush batch will exercise the same behavior as gem_sync, just through a different path.)

Do you have any other ivb with which to compare?

I tested over another IVB and the test failed 4 of 20 times with the same assertion failure.

Adding dmesg:
==================================================
[ 9137.965587] gem_sync: executing
[ 9137.965698] [drm:i915_gem_open]
[ 9137.966244] [drm:i915_gem_open]
[ 9137.966423] gem_sync: starting subtest forked-default
[ 9147.971833] gem_sync: exiting, ret=0
[ 9149.972035] gem_sync: executing
[ 9149.972154] [drm:i915_gem_open]
[ 9149.972697] [drm:i915_gem_open]
[ 9149.972949] gem_sync: starting subtest forked-default
[ 9159.981402] gem_sync: exiting, ret=0
[ 9162.323082] gem_sync: executing
[ 9162.323192] [drm:i915_gem_open]
[ 9162.323744] [drm:i915_gem_open]
[ 9162.323985] gem_sync: starting subtest forked-default
[ 9172.333606] gem_sync: exiting, ret=99

IGT output:
================================================
IGT-Version: 1.15-g572a770 (x86_64) (Linux: 4.8.0-rc4-drm-intel-nightly-ww36-commit-f4f46e5+ x86_64)
(gem_sync:9227) igt-core-DEBUG: Test requirement passed: !igt_run_in_simulation()
(gem_sync:9227) drmtest-DEBUG: Test requirement passed: !(fd<0)
Using Legacy submission , with semaphores
(gem_sync:9227) igt-core-DEBUG: Starting subtest: forked-default
(gem_sync:9227) ioctl-wrappers-DEBUG: Test requirement passed: gem_has_ring(fd, ring)
Completed 424960 cycles: 23.542 us
Completed 872448 cycles: 11.464 us
Completed 1026048 cycles: 9.753 us
Completed 756736 cycles: 13.224 us
(gem_sync:9227) CRITICAL: Test assertion failure function sync_ring, file gem_sync.c:153:
(gem_sync:9227) CRITICAL: Failed assertion: intel_detect_and_clear_missed_interrupts(fd) == 0
(gem_sync:9227) CRITICAL: error: 1 != 0
Stack trace:
  #0 [__igt_fail_assert+0x101]
  #1 [sync_ring+0x306]
  #2 [__real_main722+0x5b6]
  #3 [main+0x23]
  #4 [__libc_start_main+0xf0]
  #5 [_start+0x29]
  #6 [<unknown>+0x29]
Subtest forked-default failed.
**** DEBUG ****
(gem_sync:9227) ioctl-wrappers-DEBUG: Test requirement passed: gem_has_ring(fd, ring)
(gem_sync:9227) CRITICAL: Test assertion failure function sync_ring, file gem_sync.c:153:
(gem_sync:9227) CRITICAL: Failed assertion: intel_detect_and_clear_missed_interrupts(fd) == 0
(gem_sync:9227) CRITICAL: error: 1 != 0
****  END  ****
Subtest forked-default: FAIL (10.010s)
(gem_sync:9227) igt-core-DEBUG: Exiting with status code 99

Luis, please re-test with Chris' patch: https://patchwork.freedesktop.org/series/21876/

(In reply to yann from comment #7)
> Luis, please re-test with Chris' patch:
> https://patchwork.freedesktop.org/series/21876/

With the patch provided, issue is not reproducible after 30 iterations.

*** Bug 101719 has been marked as a duplicate of this bug. ***

Chris let us know when patch is upstream and we will retest...

The following tests PASS on IVB with this configuration

Tests List:

igt@gem_sync@forked-render
igt@gem_sync@forked-default


This is my configuration:

====================================================
Graphic Stack
====================================================
Component: drm
    tag: libdrm-2.4.81-33-g3876bc2
    commit: 3876bc246a07070a6043159cd7623d4def9bbd4c

Component: cairo
    tag: 1.15.6-2-g57b4050
    commit: 57b40507dda3f58dfc8635548d606b86dc7bcf51

Component: intel-gpu-tools
    tag: intel-gpu-tools-1.19-112-g493151b
    commit: 493151b0768aa4ca535cef49cb7efa174a9c3a77

Component: piglit
    tag: piglit-v1
    commit: 973892687cf5c2f8e2dbe1d22998b82736643787

======================================
             Hardware
======================================
==============================================================
Essentials
==============================================================
Processor Number			i5-3330
Status					Launched
Launch Date				Q3'12
Lithography				22 nm


==============================================================
Performance
==============================================================
# of Cores				4
# of Threads				4
Processor Base Frequency		3.00 GHz
Max Turbo Frequency			3.20 GHz
Cache					6 MB SmartCache
Bus Speed				5 GT/s DMI
TDP					77 W

==============================================================
Memory Specifications
==============================================================
Max Memory Size 			32 GB
Memory Types				DDR3 1333/1600
Max # of Memory Channels		2
Max Memory Bandwidth			25.6 GB/s
ECC Memory Supported  			No

==============================================================
Graphics Specifications
==============================================================
Processor Graphics 			Intel® HD Graphics 2500
Graphics Base Frequency			650.00 MHz
Graphics Max Dynamic Frequency		1.05 GHz
Intel® Quick Sync Video 		Yes
Intel® InTru™ 3D Technology		Yes
Intel® Wireless Display 		Yes
Intel® Flexible Display Interface 	Yes
Intel® Clear Video HD Technology	Yes
# of Displays Supported 		3
Device ID				0x152




Note: Closing this BUG since test is shown as PASSED...