On Sun, Oct 09, 2005 at 11:51:28PM +0100, Chris Lightfoot wrote:
> (TBH I'm surprised that the AIO code shows so little
> improvement. The kernel does report that it's using 2.6
> host AIO, so it is using the new version. Obviously
> issuing the writes segment-by-segment is non-ideal but I'm
> surprised it's this bad. Could I be missing some
> configuration step?)
Make sure you've got the o_direct patch, and are using a 4K block filesystem.
If you're not doing O_DIRECT, then io_getevents waits - i.e. it's synchronous.
Jeff
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