Bug 110029 - [GEN8+] 1-2% perf drop in SynMark2 OglPSPom
Summary: [GEN8+] 1-2% perf drop in SynMark2 OglPSPom
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: Intel 3D Bugs Mailing List
QA Contact: Intel 3D Bugs Mailing List
Depends on:
Reported: 2019-03-13 11:59 UTC by Eero Tamminen
Modified: 2019-09-25 20:32 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


Description Eero Tamminen 2019-03-13 11:59:04 UTC
* Ubuntu 18.04 with Unity/compiz
* v4.19+ drm-tip kernel & git version of Xserver
* Mesa git version
* FullHD monitor

* SynMark2 v7 OglPSPom test in FullHD fullscreen

Performance of that has dropped by 1-2% on all GEN8+ platforms between following Mesa commits:
* 2019-02-01 17:34:02 ab940b0d97: spirv: Support LocalSizeId and LocalSizeHintId execution modes
* 2019-02-02 14:42:14 0aa5a97b03: relnotes: Add VK_EXT_buffer_device_address

There was no perf drop on SNB/HSW, or in other benchmarks I'm running.

Wontfixing this is fine, but I think somebody should bisect it first.
Comment 1 Eero Tamminen 2019-06-07 11:12:18 UTC
Between following commits:
* 2019-03-13 17:54:16 97ad0efba0: iris: Use streaming loads to read from tiled surfaces
* 2019-03-14 17:22:20 162286eb75: anv: Only set 3DSTATE_PS::VectorMaskEnable on gen8+

PSPom improved on BXT platforms about same amount it had regressed earlier, but there was no impact on other platforms.
Comment 2 GitLab Migration User 2019-09-25 20:32:33 UTC
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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