Messages in this thread | | | Date | Thu, 23 Feb 2006 22:09:15 +0100 | From | thunder7@xs4all ... | Subject | Re: MD Raid 6: poor algorithm choice? |
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From: Chris Boot <bootc@bootc.net> Date: Thu, Feb 23, 2006 at 06:00:10PM +0000 > Hi all, > > [4295106.474000] raid6: mmxx2 2500 MB/s > [4295106.521000] raid6: sse1x2 2339 MB/s > [4295106.524000] raid6: using algorithm sse1x2 (2339 MB/s) > [4295106.531000] md: raid6 personality registered for level 6 > > I just loaded the raid6 module for fun (might end up using it one day), and > I was surprised at its choice of algorithm. By the messages above, I would > have assumed it would choose the mmxx2 algorithm at 2500 MB/s instead of > sse1x2 at the slightly slower 2339 MB/s. This is probably entirely expected > behaviour, but why? > Because it is more cache-efficient (allows the other code to run at a higher speed). This comes up now and again, perhaps these messages should be rephrased.
Jurriaan -- Uhm, well, what we are talking about in privy terms, is the very latest in front-wall fresh air orifices combined with a wide capacity gutter installation below. You mean crap out of the window? Blackadder II Debian (Unstable) GNU/Linux 2.6.16-rc3-mm1 5503 bogomips load load 0.01 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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