Messages in this thread | | | Date | Thu, 1 Mar 2007 17:54:54 +0300 | From | Evgeniy Polyakov <> | Subject | Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3 |
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On Thu, Mar 01, 2007 at 03:16:37PM +0100, Ingo Molnar (mingo@elte.hu) wrote: > > * Eric Dumazet <dada1@cosmosbay.com> wrote: > > > I can tell you that the problem (at least on my machine) comes from : > > > > gettimeofday(&tm, NULL); > > > > in evserver_epoll.c > > yeah, that's another difference - especially if it's something like an > Athlon64 and gettimeofday falls back to pm-timer, that could explain the > performance difference. That's why i repeatedly asked Evgeniy to use the > /very same/ client function for both the epoll and the kevent test and > redo the measurements. The numbers are still highly suspect - and we are > already down from the prior claim of kevent being almost twice as fast > to a 25% difference.
There is no gettimeofday() in the running code anymore, and it was placed not in common server processing code btw.
Ingo, do you really think I will send mails with faked benchmarks? :))
Btw, there were never almost twice perfromance increase - epoll in my tests always showed 4-5 thousands requests per second, kevent - up to 7 thausands.
That starts looking like ghost hunting, Ingo, you already said that you do not see any need in kevent, have you changed your opinion on that?
> Ingo
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