From: erik quanstrom <quanstro@coraid.com>
To: 9fans@9fans.net
Subject: Re: [9fans] image/memimage speed
Date: Fri, 5 Dec 2008 14:25:10 -0500 [thread overview]
Message-ID: <57cb40901c57600ac592ec15ccb1a687@coraid.com> (raw)
In-Reply-To: <49397F3E.9070801@telus.net>
On Fri Dec 5 14:23:22 EST 2008, plalonde@telus.net wrote:
> Again, you can stream a whole frame buffer reasonably fast - that should
> be nearly full-rate; it should be full rate if you pre-fetch with
> sufficient advance notice (500-1000 clocks), or DMA. But random access
> reads *have* to be slow: you get a stall while the system goes to PCIe
> for each cache line you attempt to read from.
>
> Paul
the cpu is allowed to speculatively cache WC memory.
- erik
next prev parent reply other threads:[~2008-12-05 19:25 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-30 22:00 Iruata Souza
2008-11-30 23:54 ` Iruata Souza
2008-12-01 1:29 ` erik quanstrom
2008-12-01 1:54 ` andrey mirtchovski
2008-12-01 2:35 ` erik quanstrom
2008-12-01 3:30 ` andrey mirtchovski
2008-12-01 6:41 ` Paul Lalonde
2008-12-01 14:19 ` Steve Simon
2008-12-01 14:33 ` erik quanstrom
2008-12-05 6:39 ` ron minnich
2008-12-05 13:35 ` erik quanstrom
2008-12-05 18:27 ` Russ Cox
2008-12-05 18:32 ` Russ Cox
2008-12-05 18:49 ` ron minnich
2008-12-05 19:21 ` Paul Lalonde
2008-12-05 19:25 ` erik quanstrom [this message]
2008-12-05 19:30 ` Paul Lalonde
2008-12-05 19:40 ` erik quanstrom
2008-12-05 20:11 ` ron minnich
2008-12-06 5:52 ` Paul Lalonde
2008-12-07 17:00 ` Aki Nyrhinen
2008-12-07 23:22 ` erik quanstrom
2008-12-08 0:17 ` Aki Nyrhinen
2008-12-01 15:24 plalonde
2008-12-05 5:22 ` sqweek
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