[Bug 31572] [bisected piketon] urbanterror performance regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=31572

fangxun <xunx.fang at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[piketon] urbanterror       |[bisected piketon]
                   |performance regression      |urbanterror performance
                   |                            |regression
            Product|Mesa                        |DRI
          Component|Drivers/DRI/i965            |libdrm
         AssignedTo|eric at anholt.net             |dri-devel at lists.freedesktop
                   |                            |.org

--- Comment #1 from fangxun <xunx.fang at intel.com> 2010-11-16 01:33:24 PST ---
Sorry, bisect shows it's Libdrm caused this issue.
877b2ce15b80975b4dac42657bdfb0a3da833e1c is first bad commit.
commit 877b2ce15b80975b4dac42657bdfb0a3da833e1c
49447a9b957047db2549b8a929e763bbd87808ba
Author: Eric Anholt <eric at anholt.net>
Date:   Tue Nov 9 13:51:45 2010 -0800

    intel: Fix drm_intel_gem_bo_wait_rendering to wait for read-only usage too.

    Both the consumers of this API (sync objects and client throttling)
    were expecting this behavior.  The kernel used to actually behave the
    desired (but incorrect) way for us anyway, but that got fixed a while
    back.

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