From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 93301] ns2_linux32: radeon VM fault on Hawaii (+mmap errors)
Date: Wed, 09 Dec 2015 14:35:13 +0000 [thread overview]
Message-ID: <bug-93301-502-lol22llWX6@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-93301-502@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=93301
--- Comment #14 from Marek Olšák <maraeo@gmail.com> ---
No, Hawaii doesn't have DCC.
The issue can indeed be that there is not enough address space. Mesa doesn't
unmap most buffers, because mmap is a very costly operation. Such buffers are
only unmapped when destroyed. This is obviously a problem on 32-bit. Possible
solutions:
1) Always unmap buffers at appropriate places. This can have a significant
performance cost in CPU-bound apps.
2) Clear pb_cache on mmap failure and try mmap again.
(pb_cache typically contains staging buffers, which are always mapped.
Therefore, pb_cache completely hides allocation, GPU mmap, and CPU mmap
overhead, but it also contributes to address space usage.)
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next prev parent reply other threads:[~2015-12-09 14:35 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 4:10 [Bug 93301] ns2_linux32: radeon VM fault / VM_CONTEXT1_PROTECTION_FAULT_ADDR bugzilla-daemon
2015-12-09 5:48 ` bugzilla-daemon
2015-12-09 5:52 ` bugzilla-daemon
2015-12-09 6:22 ` bugzilla-daemon
2015-12-09 9:21 ` bugzilla-daemon
2015-12-09 9:23 ` bugzilla-daemon
2015-12-09 9:39 ` bugzilla-daemon
2015-12-09 9:44 ` bugzilla-daemon
2015-12-09 9:52 ` bugzilla-daemon
2015-12-09 10:18 ` bugzilla-daemon
2015-12-09 10:37 ` bugzilla-daemon
2015-12-09 10:39 ` bugzilla-daemon
2015-12-09 12:37 ` [Bug 93301] ns2_linux32: radeon VM fault on Hawaii w/ DCC enabled (+mmap errors) bugzilla-daemon
2015-12-09 12:39 ` [Bug 93301] ns2_linux32: radeon VM fault on Hawaii " bugzilla-daemon
2015-12-09 12:51 ` bugzilla-daemon
2015-12-09 14:18 ` bugzilla-daemon
2015-12-09 14:35 ` bugzilla-daemon [this message]
2015-12-09 20:28 ` bugzilla-daemon
2015-12-09 21:05 ` bugzilla-daemon
2015-12-09 21:56 ` bugzilla-daemon
2015-12-10 1:46 ` bugzilla-daemon
2015-12-10 1:47 ` bugzilla-daemon
2015-12-10 1:48 ` bugzilla-daemon
2015-12-10 11:35 ` bugzilla-daemon
2015-12-10 13:01 ` bugzilla-daemon
2015-12-10 14:41 ` bugzilla-daemon
2017-01-14 19:54 ` bugzilla-daemon
2017-01-14 20:25 ` bugzilla-daemon
2017-01-14 22:31 ` bugzilla-daemon
2017-01-14 23:00 ` bugzilla-daemon
2017-01-15 1:59 ` bugzilla-daemon
2017-08-24 21:02 ` bugzilla-daemon
2017-08-25 8:36 ` bugzilla-daemon
2017-10-09 15:34 ` bugzilla-daemon
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