From owner-freebsd-performance@FreeBSD.ORG Sun May 7 20:32:33 2006 Return-Path: X-Original-To: performance@freebsd.org Delivered-To: freebsd-performance@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id ACC8D16A402; Sun, 7 May 2006 20:32:33 +0000 (UTC) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6638943D45; Sun, 7 May 2006 20:32:33 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 179A01A3C1A; Sun, 7 May 2006 13:32:32 -0700 (PDT) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 06C0851695; Sun, 7 May 2006 16:32:31 -0400 (EDT) Date: Sun, 7 May 2006 16:32:30 -0400 From: Kris Kennaway To: Sven Petai Message-ID: <20060507203230.GA3870@xor.obsecurity.org> References: <20060506150622.C17611@fledge.watson.org> <200605072200.42529.hadara@bsd.ee> <20060507191641.GA1851@xor.obsecurity.org> <200605072327.23901.hadara@bsd.ee> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+HP7ph2BbKc20aGI" Content-Disposition: inline In-Reply-To: <200605072327.23901.hadara@bsd.ee> User-Agent: Mutt/1.4.2.1i Cc: rwatson@freebsd.org, performance@freebsd.org, current@freebsd.org, Kris Kennaway Subject: Re: Fine-grained locking for POSIX local sockets (UNIX domain sockets) X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 May 2006 20:32:33 -0000 --+HP7ph2BbKc20aGI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, May 07, 2006 at 11:27:22PM +0300, Sven Petai wrote: > On Sunday 07 May 2006 22:16, you wrote: > > On Sun, May 07, 2006 at 10:00:41PM +0300, Sven Petai wrote: > > > The results in my mail were mean values over 2 runs, > > > only once did I see really huge (more than 10%) differences between > > > several subsequent runs with same settings, this case was clearly > > > mentioned in the results. > > > > FYI, 2 is not really enough, you should do at least 10 repetitions of > > each test to reduce variance (which can be a lot, despite what you > > saw!) and so that differences between them can be accurately > > estimated. Ministat is really helpful for this. > > >=20 > I'm well aware that 2 is not enough for quality measurements and > I certainly would have liked to do more repetitions, but I was running ag= ainst=20 > a clock - this machine might be shipped out to client any > time and I wanted to test several combinations of OS [fbsd 6, fbsd curren= t,=20 > current + watsons patch, linux] with different threading library and=20 > scheduler combinations at different thread counts and nice values.=20 > This creates nice combinatorial explosion. FYI, ULE is probably not worth bothering about. It has too many performance problems and no owner. Kris --+HP7ph2BbKc20aGI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEXlleWry0BWjoQKURAmN9AJ4+rdkseL9s+SS44k1FHLy7jUPobQCfaCQT mY4gf5mjZoQvumvcIn9OdPE= =UtMz -----END PGP SIGNATURE----- --+HP7ph2BbKc20aGI--