From: Adam Jackson <ajax@redhat.com>
To: Knut Petersen <Knut_Petersen@t-online.de>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Subject: Re: X11 performance regressions
Date: Mon, 09 May 2011 12:53:57 -0400 [thread overview]
Message-ID: <4DC81C25.7070307@redhat.com> (raw)
In-Reply-To: <4DC6DF5D.2050006@t-online.de>
On 5/8/11 2:22 PM, Knut Petersen wrote:
> Software
> =======
> 1.86 MHz system:
> opensuse 11.2
> X.Org X Server 1.6.5
> Release Date: 2009-10-11
> kernel 2.6.38.5
>
> 2.00 MHz system:
> opensuse 11.4
> X.Org X Server 1.10.99
> git-tree, 2011-may-7
> kernel 2.6.39-rc4-drm-intel-staging
I'd start by suspecting differences in .config for the kernel between
the two, particularly since...
> 10000000 trep @ 0.0032 msec (309000.0/sec): Dot
> 40000000 trep @ 0.0006 msec (1650000.0/sec): Dot
Dot dispatch is so completely CPU-dominated that I suspect you're simply
measuring CPU overhead somewhere else. For example, if one of those
kernels is built with spinlock debugging and the other isn't.
- ajax
next prev parent reply other threads:[~2011-05-09 16:53 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-08 18:22 X11 performance regressions Knut Petersen
2011-05-09 16:53 ` Adam Jackson [this message]
2011-05-09 21:43 ` Chris Wilson
2011-05-11 14:46 ` Knut Petersen
2011-05-11 17:52 ` Chris Wilson
2011-05-12 7:19 ` Knut Petersen
2011-05-12 7:38 ` Chris Wilson
2011-05-12 8:24 ` Knut Petersen
2011-05-12 8:55 ` Chris Wilson
2011-05-12 9:34 ` Knut Petersen
2011-05-13 9:24 ` Knut Petersen
2011-05-11 19:49 ` Adam Jackson
2011-05-11 21:22 ` Knut Petersen
2011-05-12 13:42 ` Adam Jackson
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