Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

Eric Dumazet
2007-03-01T14:31:35Z

On Thursday 01 March 2007 15:16, Ingo Molnar 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.

Also, ab is quite lame... Maybe we could use a epoll based 'stresser'

On my machines (again ...), ab is the slow thing... not the 'server'

Some small differences in behavior could have a big impact on ab (and you
could think there is a problem on the remote side)