Re: [PATCH] speed up SATA

From: Timothy Miller
Date: Tue Mar 30 2004 - 13:01:49 EST

Jeff Garzik wrote:

If you are taking your samples over time, that shouldn't matter... if the system workload is such that you are hitting the drive cache the majority of the time, you're not being "fooled" by cache hits, the patch would be taking those cache hits into account.

If the system isn't hitting the drive cache the majority of the time, statistical sampling will automatically notice that too...

I completely agree, although Jens' patch seems to try to learn the drive's maximum speed and go based on that. Maybe I misread the code. Anyhow, it's certainly excellent for a starting point... it's this sort of proof-of-concept that gets the ball rolling. Plus, it's already better than Jens says it is. :)

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