Date: Tue, 16 Jan 2007 19:39:29 +0100 From: "Attilio Rao" <attilio@freebsd.org> To: "Julian Elischer" <julian@elischer.org> Cc: Kip Macy <kip.macy@gmail.com>, freebsd-current@freebsd.org, Pawel Jakub Dawidek <pjd@freebsd.org>, Suleiman Souhlal <ssouhlal@freebsd.org>, freebsd-arch@freebsd.org Subject: Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs Message-ID: <3bbf2fe10701161039g4b1572a1qf8b97f2389b31a0e@mail.gmail.com> In-Reply-To: <45AD19B2.6010806@elischer.org> References: <3bbf2fe10607250813w8ff9e34pc505bf290e71758@mail.gmail.com> <3bbf2fe10607250814m1a476f09p2d962dedc0c99be1@mail.gmail.com> <200607251232.51230.jhb@freebsd.org> <3bbf2fe10607251004wf94e238xb5ea7a31c973817f@mail.gmail.com> <3bbf2fe10607261127p3f01a6c3w80027754f7d4e594@mail.gmail.com> <3bbf2fe10607281004o6727e976h19ee7e054876f914@mail.gmail.com> <3bbf2fe10701160851r79b04464m2cbdbb7f644b22b6@mail.gmail.com> <45AD19B2.6010806@elischer.org>
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2007/1/16, Julian Elischer <julian@elischer.org>: > Attilio Rao wrote: > > 2006/7/28, Attilio Rao <attilio@freebsd.org>: > >> > >> After some thinking, I think it's better using init/fini methods > >> (since they hide the sizeof(struct turnstile) with size parameter). > >> > >> Feedbacks and comments are welcome: > >> http://users.gufi.org/~rookie/works/patches/uma_sync_init.diff > > > > [CC'ed all the interested people] > > > > Even if a long time is passed I did some benchmarks based on ebizzy tool. > > This program claims to reproduce a real httpd server behaviour and is > > used into the Linux world for benchmarks, AFAIK. > > I think that results of the comparison on this patch is very > > interesting, and I think it worths a commit :) > > I think that results can be even better on a Xeon machine (I had no > > chance to reproduce this on some of these). > > (Results taken in consideration have been measured after some starts, > > in order to minimize caching differences). > > > > The patch: > > http://users.gufi.org/~rookie/works/patches/ts-sq/ts-sq.diff > > > > The benchmark results: > > http://users.gufi.org/~rookie/works/patches/ts-sq/ts-sq.benchmark > > those are very big differences! > what does the benchmark actually measure? just time ./ebizzy (which create a lot of contention inside the kernel). Attilio -- Peace can only be achieved by understanding - A. Einstein
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