From: Andrew Morton <andrewm@uow.edu.au>
To: safemode <safemode@voicenet.com>
Cc: William Montgomery <william@opinicus.com>,
Andrea Arcangeli <andrea@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: lowlatency 2.2.19
Date: Tue, 05 Jun 2001 11:20:05 +1000 [thread overview]
Message-ID: <3B1C33C5.AB6C8CD0@uow.edu.au> (raw)
In-Reply-To: <Pine.LNX.3.96.1010604173410.5728A-100000@thing2.opinicus.com>, <Pine.LNX.3.96.1010604173410.5728A-100000@thing2.opinicus.com> <01060420580802.31206@psuedomode>
safemode wrote:
>
> this is just a general question about low latency patches on 2.2, I
> remember hearing about low latency patches for 2.4 not playing well with X
> 4.x, is this true for 2.2 low latency patches as well?
Yes, it would be the case.
Some video cards have a PCI cheat-mode in which they keep
the PCI bus busy until they are ready to accept new
commands, rather forcing a retry. Figures of up to
twenty milliseconds have been mentioned. Your X server
*may* support the `PCIRetry' config option which will
defeat this.
Info:
http://www.lib.uaa.alaska.edu/linux-kernel/archive/2001-Week-02/1566.html
http://www.zefiro.com/vgakills.txt
http://www.zdnet.com/pcmag/news/trends/t980619a.htm
http://www.research.microsoft.com/~mbj/papers/tr-98-29.html
-
next prev parent reply other threads:[~2001-06-05 1:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-03 14:38 lowlatency 2.2.19 William Montgomery
2001-06-04 12:56 ` Andrea Arcangeli
2001-06-04 21:42 ` William Montgomery
2001-06-05 0:58 ` safemode
2001-06-05 1:20 ` Andrew Morton [this message]
2001-06-07 11:05 ` Pierre Etchemaite
2001-06-05 3:23 ` William Montgomery
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