[Bug 96743] [BYT, HSW, SKL, BXT, KBL] GPU hangs with GfxBench 4.0 CarChase

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96743

--- Comment #47 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
(In reply to Topi Pohjolainen from comment #45)
> Dumping batches seems to change the runtime dynamics too much and the hang
> just won't reoccur. I even tried a more light-weight version of batch
> dumping which just checks that instruction is valid. Both require mapping
> and un-mapping of the underlying buffer object which might prevent/hide the
> hang from reappearing within reasonable amount time.

Checking instructions before flushing allows one to read the batch thru the
mapping used for batch emission. With that I was actually able to catch the
user space writing an invalid instruction. Checking that now.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-3d-bugs/attachments/20170824/9ce84d50/attachment.html>