Messages in this thread | | | From | "Chen, Kenneth W" <> | Subject | RE: [PATCH] 4/4 block: explicit plugging | Date | Fri, 5 Jan 2007 14:04:19 -0800 |
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Andrew Morton wrote on Wednesday, January 03, 2007 12:09 AM > Do you have any benchmarks which got faster with these changes?
Jens Axboe wrote on Wednesday, January 03, 2007 12:22 AM > I've asked Ken to run this series on some of his big iron, I hope he'll > have some results for us soonish. I can run some pseudo benchmarks on a > 4-way here with some simulated storage to demonstrate the locking > improvements.
> Jens Axboe wrote on Thursday, January 04, 2007 6:39 AM > > I will just retake the tip of your plug tree and retest. > > That would be great! There's a busy race fixed in the current branch, > make sure that one is included as well.
Good news: the tip of plug tree fixed the FC loop reset issue we are seeing earlier.
Performance wise, our big db benchmark run came out with 0.14% regression compare to 2.6.20-rc2. It is small enough that we declared it as noise level change. Unfortunately our internal profile tool broke on 2.6.20-rc2 so I don't have an execution profile to post.
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