| Date | Thu, 21 Mar 2013 18:23:37 -0700 | Subject | Re: ipc,sem: sysv semaphore scalability | From | Linus Torvalds <> |
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On Thu, Mar 21, 2013 at 6:12 PM, Davidlohr Bueso <davidlohr.bueso@hp.com> wrote: > > ipc lock contention: > 100 users: 8,74% (vanilla) 3.17% (v3 patchset) > 400 users: 21,86% (vanilla) 5.23% (v3 patchset) > 800 users 84,35% (vanilla) 7.39% (v3 patchset)
Ok, I'd call that pretty much "solved". Sure, it's still visible, but for being a benchmark that apparently does little else than pound on those sysv semaphores, I think we can consider it pretty much fine. I'm going to assume that anybody who actually then does any real work (ie a database) is never going to see even close to this bad contention.
Good job, Rik. I'm assuming we'll be merging this during the 3.10 merge window, and hopefully the merge conflicts will be sorted out too. Rik, Peter, can you look at each others patches and see if you can get that sorted out for Andrew?
Linus
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