From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 31635] New: Bad performance of 64-bit compilation compared to 32-bit.
Date: Mon, 15 Nov 2010 11:03:25 -0800 (PST) [thread overview]
Message-ID: <bug-31635-502@http.bugs.freedesktop.org/> (raw)
https://bugs.freedesktop.org/show_bug.cgi?id=31635
Summary: Bad performance of 64-bit compilation compared to
32-bit.
Product: Mesa
Version: git
Platform: x86-64 (AMD64)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/r300
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: drill87@gmail.com
I've got archlinux 64-bit system with chrooted archlinux 32-bit in it.
Video card: ATI X1270 (RS690)
Kernel version: 2.6.35
Xorg server version: 1.9.0
I've compiled r300g both for 32-bit and 64-bit systems with parameters:
--prefix=/usr --enable-glx-tls --disable-egl --enable-gallium-radeon
--with-dri-driverdir=/usr/lib/xorg/modules/dri --with-dri-drivers="radeon,r300"
--with-state-trackers="glx,dri"
After tests I found, that in 32-bit r300g gives 860 fps in glxgears, whereas
64-bit version only 250. I also compared framerate in 3D action game Tremulous,
which has precompiled binaries for both 32-bit and 64-bit linux - the result
was similar: I've got 38 fps in 32-bit version and only 18 fps in 64-bit in
same scene.
Unfortunately, I'm not sure if this is a real bug or just a bad optimization of
64-bit version - I couldn't find any specific information about that...
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next reply other threads:[~2010-11-15 19:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-15 19:03 bugzilla-daemon [this message]
2010-11-15 19:15 ` [Bug 31635] [r300g]Bad performance of 64-bit compilation compared to 32-bit bugzilla-daemon
2010-11-15 20:51 ` bugzilla-daemon
2010-11-15 21:16 ` bugzilla-daemon
2010-11-16 7:46 ` bugzilla-daemon
2010-11-16 7:47 ` bugzilla-daemon
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