Bug 91801 - [amd][tahiti xt] severe performance loss
Summary: [amd][tahiti xt] severe performance loss
Status: RESOLVED NOTOURBUG
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Radeon (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Default DRI bug account
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Reported: 2015-08-29 19:29 UTC by Sylvain BERTRAND
Modified: 2015-09-09 09:38 UTC (History)
0 users

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Description Sylvain BERTRAND 2015-08-29 19:29:23 UTC 
With the same user space (mesa/libdrm...), I went from agd5f linux (drm-fixes-4.1 ee18e599251ed06bf0c8ade7c434a0de311342ca)
to an official linux 4.2-rc8.
All 3D games suffer from a severe performance loss.
Comment 1 Sylvain BERTRAND 2015-08-29 20:05:32 UTC 
I tried with latest agd5f drm-next-4.3 (c2b6bd7e91aad8440a2f55bdbde6f5a8ae19fac5)
The performance loss is the same than with the official 4.2-rc8.
Comment 2 Sylvain BERTRAND 2015-08-30 20:28:21 UTC 
bisected: commit 8cb9764fc88b41db11f251e8b2a0d006578b7eb4
Not a driver bug, linux core scheduler code seems screwed for my full dyntick
systems :(((((

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