Messages in this thread | | | From | Jan Knutar <> | Subject | Re: Finding what is stuck... | Date | Tue, 2 Sep 2008 04:53:35 +0300 |
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On Tuesday 02 September 2008, J.A. Magallón wrote:
> I'm running 2.6.27-rc5-git2 on an Aspire One. > The system is in general pretty responsive, but sometimes it just > gets totally stuck. Even the mouse stops. > > It looks related to disk (SSD) access, but I'm not totally sure.
Are you hitting swap at all? Does it have swap?
On my N810 tablet there can be a huge slowdown if it starts swapping. The first time it dips into swap is relatively painless when stuff gets written out sequentially, but after that when writes are mostly random the throughput drops to a few kilobytes per second, causing massive slowdown... The MMC/SD cards hate random write, and I expect SSDs are no better.
iostat -x -k 10 in a terminal is useful. Check the iowait and util% numbers after/during slowdown... -- 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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