Messages in this thread | | | Date | Thu, 23 Feb 2006 18:00:10 +0000 | From | Chris Boot <> | Subject | MD Raid 6: poor algorithm choice? |
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Hi all,
[4295106.360000] raid6: int32x1 714 MB/s [4295106.381000] raid6: int32x2 742 MB/s [4295106.403000] raid6: int32x4 632 MB/s [4295106.429000] raid6: int32x8 523 MB/s [4295106.453000] raid6: mmxx1 1476 MB/s [4295106.474000] raid6: mmxx2 2500 MB/s [4295106.500000] raid6: sse1x1 1375 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?
Cheers, Chris
-- Chris Boot bootc@bootc.net http://www.bootc.net/ - 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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