Messages in this thread | | | Date | Fri, 09 Jul 2004 07:23:29 -0700 | From | "Martin J. Bligh" <> | Subject | Re: [PATCH] Autotune swappiness |
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>>> Here is another try at providing feedback to tune the vm_swappiness. >> >> >> I spent some time yesterday trying to demonstrate performance improvements >> from those two patches. Using >> >> make -j4 vmlinux with mem=64m >> >> and >> >> qsbench -p 4 -m 96 with mem=256m >> >> and was not able to do so, which is what I expected. >> >> We do need more quantitative testing on this work. > > Sure thing. > > I need to point out a few things: > The point of this patch was to improve the swap behaviour on desktop like loads. > The fact that it improved the "when swap is thrashing" scenario (in my testing) was an unintentional bonus. > I dont think your load of j4 will induce quite the same swap thrash as what I was testing. I actually suspect the faster cpu & more jobs over fixed memory shows it more. > I need someone with more varied hardware to test it for me. I can recreate equivalent results on my current machine which has similar hardware, but I think results showing improvement on different machines and different loads is what you're looking for... and since I'm currently quite low on hardware I can only offer results from this one (and my wife is hating it being offline o_0) > > Anyone willing to offer to do some tests?
What kind of mem pressure are you looking for? kernel compile is easy to run, and straight "-j" should kill a small system fairly well ... you want it just into swap, or thrashing the crap out of it?
M.
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