Date: Sun, 7 May 2006 16:32:30 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Sven Petai <hadara@bsd.ee> Cc: rwatson@freebsd.org, performance@freebsd.org, current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: Fine-grained locking for POSIX local sockets (UNIX domain sockets) Message-ID: <20060507203230.GA3870@xor.obsecurity.org> In-Reply-To: <200605072327.23901.hadara@bsd.ee> References: <20060506150622.C17611@fledge.watson.org> <200605072200.42529.hadara@bsd.ee> <20060507191641.GA1851@xor.obsecurity.org> <200605072327.23901.hadara@bsd.ee>
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--+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--
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