From: Andrew Morton <akpm@linux-foundation.org>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
Cc: bugme-daemon@bugzilla.kernel.org, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [Bug 10328] New: [regression] performance drop for glx
Date: Tue, 25 Mar 2008 15:28:09 -0700 [thread overview]
Message-ID: <20080325152809.e2b07251.akpm@linux-foundation.org> (raw)
In-Reply-To: <bug-10328-27@http.bugzilla.kernel.org/>
(switched to email. Please respond via emailed reply-to-all, not via the
bugzilla web interface).
On Tue, 25 Mar 2008 15:11:15 -0700 (PDT)
bugme-daemon@bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=10328
>
> Summary: [regression] performance drop for glx
> Product: Memory Management
> Version: 2.5
> KernelVersion: 2.6.25-rc6
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Other
> AssignedTo: akpm@osdl.org
> ReportedBy: bug-track@fisher-privat.net
>
>
> after commit 4138cc3418f5eaa7524ff8e927102863f1ba0ea5 i expirience some grafik
> related perfomance issues.
>
> I used glxgears for test.
> before this patch: 1281.005 FPS
> and after: 765.000 FPS
It nearly halved.
> latest tested commit a4083c9271e0a697278e089f2c0b9a95363ada0a
> still hase bad performance.
>
> I use Pentium D with 2GB RAM, Grafick: i945G, ICH7
>
That's
: commit 4138cc3418f5eaa7524ff8e927102863f1ba0ea5
: Author: Siddha, Suresh B <suresh.b.siddha@intel.com>
: Date: Wed Jan 30 13:33:43 2008 +0100
:
: x86: set strong uncacheable where UC is really desired
:
: Also use _PAGE_PWT for all the mappings which need uncache mapping.
: Instead of existing PAT2 which is UC- (and can be overwritten by MTRRs),
: we now use PAT3 which is strong uncacheable.
:
: This makes it consistent with pgprot_noncached()
:
: Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
: Signed-off-by: Ingo Molnar <mingo@elte.hu>
: Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
:
next parent reply other threads:[~2008-03-25 22:29 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-10328-27@http.bugzilla.kernel.org/>
2008-03-25 22:28 ` Andrew Morton [this message]
2008-03-26 0:39 ` [Bug 10328] New: [regression] performance drop for glx Suresh Siddha
2008-03-26 4:42 ` Arjan van de Ven
2008-04-25 5:35 ` Alexey Fisher
2008-04-26 0:07 ` Suresh Siddha
2008-04-26 11:43 ` Alexey Fisher
2008-04-28 16:34 ` Ingo Molnar
2008-03-26 5:29 ` Ingo Molnar
2008-03-26 17:55 ` Suresh Siddha
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