Bug 87733 - [BDW/BSW]igt/gem_pwrite_pread sporadically causes *ERROR* Hangcheck timer elapsed... blitter ring idle
Summary: [BDW/BSW]igt/gem_pwrite_pread sporadically causes *ERROR* Hangcheck timer ela...
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-12-26 05:26 UTC by lu hua
Modified: 2017-10-06 14:32 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg (124.87 KB, text/plain)
2014-12-26 05:26 UTC, lu hua 		no flags Details
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Description lu hua 2014-12-26 05:26:14 UTC 
Created attachment 111354 [details]
dmesg

==System Environment==
--------------------------
Regression: not sure

on-working platforms: BSW

==kernel==
--------------------------
drm-intel-next-queued/140fd38dc4962ae3694f81900b51c567df1b6d33

==Bug detailed description==
-----------------------------
It sporadically causes <3>[  118.756567] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... blitter ring idle. Fail rate: 1/5

output:
IGT-Version: 1.9-geb799b2 (x86_64) (Linux: 3.18.0-rc7_drm-intel-next-queued_140fd3_20141226+ x86_64)
** mmap snooped copy 16384 bytes x      1:      418.000µs, 39.2MiB/s
** mmap snooped copy 16384 bytes x      2:      181.500µs, 90.3MiB/s
** mmap snooped copy 16384 bytes x      4:      117.250µs, 139.7MiB/s
** mmap snooped copy 16384 bytes x      8:       85.000µs, 192.8MiB/s
** mmap snooped copy 16384 bytes x     16:       90.688µs, 180.7MiB/s
** mmap snooped copy 16384 bytes x     32:       84.469µs, 194.0MiB/s
** mmap snooped copy 16384 bytes x     64:       84.125µs, 194.8MiB/s
** mmap snooped copy 16384 bytes x    128:       86.250µs, 190.0MiB/s
** mmap snooped copy 16384 bytes x    256:       85.594µs, 191.4MiB/s
** mmap snooped copy 16384 bytes x    512:       83.424µs, 196.4MiB/s
** mmap snooped copy 16384 bytes x   1024:       84.175µs, 194.6MiB/s
** mmap snooped copy 16384 bytes x   2048:       85.220µs, 192.3MiB/s
** mmap snooped copy 16384 bytes x   4096:       78.558µs, 208.6MiB/s
** mmap snooped copy 16384 bytes x   8192:       89.401µs, 183.3MiB/s
** mmap snooped copy 16384 bytes x  16384:       83.158µs, 197.0MiB/s
** mmap snooped copy 16384 bytes x  32768:       81.299µs, 201.5MiB/s
** mmap snooped copy 16384 bytes x  65536:       76.108µs, 215.3MiB/s
** mmap snooped copy 16384 bytes x 131072:      100.904µs, 162.4MiB/s
Subtest snooped-pwrite-blt-cpu_mmap-performance: SUCCESS (23.644s)

==Reproduce steps==
---------------------------- 
1. ./gem_pwrite_pread --run-subtest snooped-pwrite-blt-cpu_mmap-performance
Comment 1 lu hua 2015-01-29 06:59:10 UTC 
It also happens on BDW.
Comment 2 Jesse Barnes 2015-03-25 22:16:47 UTC 
Does this still happen with current bits?
Comment 3 ye.tian 2015-03-26 03:29:57 UTC 
Tested with the latest kernel(nightly) on BSW, this issue does not exist.
output:
---------------
root@x-bsw08:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./gem_pwrite_pread --run-subtest snooped-pwrite-blt-cpu_mmap-performance
IGT-Version: 1.10-g4d2577e (x86_64) (Linux: 4.0.0-rc5_drm-intel-nightly_d85122_20150326+ x86_64)
Comment 4 ye.tian 2015-03-26 03:54:20 UTC 
This issue doesn't not exist on BDW.
Comment 5 Elizabeth 2017-10-06 14:32:48 UTC 
Closing old verified.

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