Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: Heuristic readahead for filesystems | Date | Wed, 11 Sep 2002 19:20:58 +0200 |
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Am Mittwoch, 11. September 2002 18:42 schrieb Rik van Riel:
> Your observation is right, but I'm not sure how much it will > matter if we start reading the file at stat() time or at > read() time. > > This is because one disk seek takes about 10 million CPU > cycles on modern systems and we'll have completed the stat(), > open() and started the read() before the disk arm has started > moving ;)
Do we gain by sorting the disk accesses ? How about savings due to better cooperation with the IO scheduler?
Regards Oliver
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