Messages in this thread | | | Date | Sun, 14 Dec 2003 11:44:17 +1100 | From | Nick Piggin <> | Subject | Re: [PATCH] improve rwsem scalability (was Re: [CFT][RFC] HT scheduler) |
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Nick Piggin wrote:
> > > Ingo Molnar wrote: > >> On Fri, 12 Dec 2003, Nick Piggin wrote: >> >> >>> getting contended. The following graph is a best of 3 runs average. >>> http://www.kerneltrap.org/~npiggin/rwsem.png >>> >> >> the graphs are too noise to be conclusive. >> >> >>> The part to look at is the tail. I need to do some more testing to see >>> if its significant. >>> >> >> yes, could you go from 150 to 300? >> > > The benchmark dies at 160 rooms unfortunately. Probably something in > the JVM. > > I'll do a larger number of runs around the 130-150 mark. >
OK, this is an average of 5 runs at 145, 150, 155 rooms with my scheduler patches, with and without my rwsem patch. Its all over the place, but I think rwsem does give a small but significant improvement.
http://www.kerneltrap.org/~npiggin/rwsem2.png
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