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Date:      Wed, 12 Sep 2001 12:52:47 -0700 (PDT)
From:      Mark Vojkovich <mvojkovich@nvidia.com>
To:        bartscgr@studbox.uni-stuttgart.de
Cc:        xpert@xfree86.org, xine-user@lists.sourceforge.net, multimedia@freebsd.org
Subject:   Re: [Xpert]XvShm slower on freebsd than on line
Message-ID:  <Pine.LNX.4.21.0109121246460.6247-100000@dhcp-198-206.nvidia.com>
In-Reply-To: <Pine.LNX.4.33.0109122047470.25100-100000@goofy.disney.gb>

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On Wed, 12 Sep 2001 bartscgr@t-online.de wrote:

> Hi,
> 
> perhaps somebody on this list can give us a clue about this ongoing
> discussion on the xine and freebsd mailing lists;
> 
> ---------- Forwarded message ----------
> Date: Wed, 12 Sep 2001 18:09:15 +0200 (CEST)
> From: Guenter Bartsch <bartscgr@studbox.uni-stuttgart.de>
> To: Jason Andresen <jandrese@mitre.org>
> Cc: bartscgr@studbox.uni-stuttgart.de, Heiko Schaefer <hschaefer@fto.de>,
>      multimedia@freebsd.org, xine-user <xine-user@lists.sourceforge.net>,
>      freebsd-hackers@freebsd.org
> Subject: Re: [xine-user] xine on freebsd?
> 
> Hi Jason,
> 
> On Wed, 12 Sep 2001, Jason Andresen wrote:
> 
> > > even when using XvShm to display the video data xfree86 uses significantly
> > > more cpu power on freebsd than on linux (~15% on freebsd compared to ~1-3%
> > > on linux) which further indicates there's something wrong here.
> > >
> > > Comments, hints, ideas very welcome,

   Most likely an MTRR issue.  An easy test is:

   x11perf -shmput500

   On something like a BX chipset with write combining you should get
in the vicinity of 150 Megabytes/sec througput (ie. roughly 150 rects
per second in 32bpp, 300 in 16bpp) on either the "nv" or "mga" drivers
that come with XFree86.


					Mark.


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