From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 38800] glXSwapBuffersMscOML is slow on AMD Fusion but not on
Intel 945 w/Atom
Date: Thu, 30 Jun 2011 05:20:41 -0700 (PDT)
Message-ID: <20110630122041.96E1C13004F@annarchy.freedesktop.org>
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https://bugs.freedesktop.org/show_bug.cgi?id=38800
--- Comment #3 from Simon Farnsworth 2011-06-30 05:20:41 PDT ---
I turned on verbose logging by adding -logverbose 65535 to my X startup line,
and I can see the following in the log:
[ 3640.369] (II) RADEON(0): radeon_dri2_schedule_flip:619 fevent[0x99fa868]
[ 3640.384] (II) RADEON(0): radeon_dri2_flip_event_handler:981
fevent[0x99fa868] width 1920 pitch 7680 (/4 1920)
If I'm understanding the code in radeon_dri2.c properly, this suggests that I'm
not getting a page flip happening, as radeon_dri2_schedule_flip does a
DRI2_SWAP type buffer exchange, not a DRI2_FLIP. It appears that DRI2_SWAP is
"exchange front buffer with back buffer, blit contents to screen".
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