From owner-freebsd-stable@FreeBSD.ORG Tue Dec 4 13:15:41 2007 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9E62A16A419 for ; Tue, 4 Dec 2007 13:15:41 +0000 (UTC) (envelope-from freebsd-stable@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.freebsd.org (Postfix) with ESMTP id 1966213C4DD for ; Tue, 4 Dec 2007 13:15:40 +0000 (UTC) (envelope-from freebsd-stable@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1IzXXW-0006CS-G9 for freebsd-stable@freebsd.org; Tue, 04 Dec 2007 13:10:18 +0000 Received: from lara.cc.fer.hr ([161.53.72.113]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 04 Dec 2007 13:10:18 +0000 Received: from ivoras by lara.cc.fer.hr with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 04 Dec 2007 13:10:18 +0000 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-stable@freebsd.org From: Ivan Voras Date: Tue, 04 Dec 2007 14:11:29 +0100 Lines: 47 Message-ID: References: <20071201213732.GA16638@cannabis.dataforce.net> <1497741406.20071201230441@rulez.sk> <20071202174540.GA29572@cannabis.dataforce.net> <200712020844.49718.linimon@FreeBSD.org> <4753C9E4.1060200@chistydom.ru> <20071203114037.G79674@fledge.watson.org> <47542372.3040303@chistydom.ru> <20071203163353.J79674@fledge.watson.org> <47551C1C.3000903@chistydom.ru> <47553170.90409@bulinfo.net> <20071204121329.N87930@fledge.watson.org> <47554773.2080806@bulinfo.net> <20071204123116.G87930@fledge.watson.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigF2AEC59CF746B56F83EA1C83" X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: lara.cc.fer.hr User-Agent: Thunderbird 2.0.0.6 (X11/20070801) In-Reply-To: <20071204123116.G87930@fledge.watson.org> X-Enigmail-Version: 0.95.3 Sender: news Subject: Re: 2 x quad-core system is slower that 2 x dual core on FreeBSD X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Dec 2007 13:15:41 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF2AEC59CF746B56F83EA1C83 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Robert Watson wrote: > Changing > locking primitives, as I mentioned in an earlier post, is a risky thing= : > after all, it intentionally changes the timing for critical kernel data= > structures in the file system code. I've given Stephan, the author of > the patch, a ping to ask him about this, but late in a release cycle, > conservativism is the watch-word. Agreed, but it would be a shame to miss on the momentum 7.0 has acquired for performance. Web servers are so common that there's a huge chance one of the first thing people will do with 7.0 would be some kind of web-benchmarks, especially after this thread on stable@. Though (as I read the thread) the patch won't bring FreeBSD in line with Linux, it will help it not to be so slow it's silly. Re: timings: Would looking at past instances give insight into future? I don't remember the time accurately, but in the past, when VFS was translated to MPSAFE and the locking reengineered, were there such proble= ms? Maybe Peter Holm can run a week or so of constant stress testing (24-hours-a-day) with the patch to verify it at least in short term? --------------enigF2AEC59CF746B56F83EA1C83 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQFHVVIJldnAQVacBcgRApEWAJ9jwrsWfsXmxAI/UqXCaZohKm0N+wCdGikZ SXaObFkNak6q++pqvWBAOwo= =VYYi -----END PGP SIGNATURE----- --------------enigF2AEC59CF746B56F83EA1C83--