Bug 91516

Summary:	Hang on Dota 2 Reborn with Unsafe Math
Product:	Mesa	Reporter:	Nick Sarnie <sarnex>
Component:	Drivers/Gallium/radeonsi	Assignee:	Default DRI bug account <dri-devel>
Status:	RESOLVED FIXED	QA Contact:	Default DRI bug account <dri-devel>
Severity:	normal
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	log with commit log without commit

Description Nick Sarnie 2015-07-31 23:48:33 UTC

Hi guys,

I get a hang with commit "gallium/radeon: re-enable unsafe math for graphics shaders."

I've attached R600_DEBUG=ps,vs with and without this commit.

I'm using llvm git and kernel 4.1.3


Thanks for your help,
sarnex

Comment 1 Nick Sarnie 2015-07-31 23:50:06 UTC

Created attachment 117476 [details]
log with commit

i had to trim to final 50k lines for both because of fdo file size

Comment 2 Nick Sarnie 2015-07-31 23:50:25 UTC

Created attachment 117477 [details]
log without commit

Comment 3 Marek Olšák 2015-08-06 14:07:56 UTC

Hi, I reverted the commit in 5d29eaef85c15663cde317c2df58ea81637c. Closing.

Comment 4 Nick Sarnie 2015-08-27 00:43:29 UTC

I cannot reproduce this on llvm git, older llvm, or older mesa. Maybe the game changed.

Comment 5 Marek Olšák 2015-10-10 21:54:25 UTC

Hi sarnex,

Could you please re-enable unsafe math and test if it works with Dota 2 Reborn now? Mesa master has some fixes which might fix the hang. We need to enable unsafe math for better performance.

Thanks.

Comment 6 Nick Sarnie 2015-10-11 03:49:26 UTC

(In reply to Marek Olšák from comment #5)
> Hi sarnex,
> 
> Could you please re-enable unsafe math and test if it works with Dota 2
> Reborn now? Mesa master has some fixes which might fix the hang. We need to
> enable unsafe math for better performance.
> 
> Thanks.

Hi Marek,

I cannot reproduce the hang or any issues with the game with your patch for unsafe math on the ML.


Thanks,
sarnex

Comment 7 Marek Olšák 2015-10-11 11:16:08 UTC

Thanks for testing.

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