From owner-freebsd-stable@FreeBSD.ORG Tue Dec 4 12:25:08 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 F112816A417 for ; Tue, 4 Dec 2007 12:25:08 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.184]) by mx1.freebsd.org (Postfix) with ESMTP id 7C02A13C465 for ; Tue, 4 Dec 2007 12:25:08 +0000 (UTC) (envelope-from tevans.uk@googlemail.com) Received: by nf-out-0910.google.com with SMTP id b2so2942735nfb for ; Tue, 04 Dec 2007 04:25:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:received:received:subject:from:to:cc:in-reply-to:references:content-type:date:message-id:mime-version:x-mailer; bh=eW67jXMS6W4GSHZw3cTXrYkZ7Jfnb9wk5ImAVmv0RoA=; b=mnhQpwPG8VKcAeqEQmvoeGBM8z/Na097S+a2zsXYr/2StgGS1qM6/eGhE5hFOuX5hfGtXSATVVOpHT53cCJMTQKNWFCHFGMH6+ZLoWD8iYAtxs8o4SVX6yIFn4ICxxyaKVkueO3jhEYURly+K/+g4x+cY9y2ygI8HHjm8G1gaDE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=received:subject:from:to:cc:in-reply-to:references:content-type:date:message-id:mime-version:x-mailer; b=kHYz2cwmBkcBiM0lMmuYDw+2MymsyFq6HRFKZ5yEGmsjM2Bx8u5q4czvJmal8+ej1vRGPCNZGUB+0JKBqSysyXHhNsD145xHVcjYQeuMsM4i2ZtYSdJb4KC0hAPqcq3ENAj+qq9r7YhCsfdZavHybYwTEj3+9gFnep8vbzCB15I= Received: by 10.78.205.7 with SMTP id c7mr2007347hug.1196771106462; Tue, 04 Dec 2007 04:25:06 -0800 (PST) Received: from ?127.0.0.1? ( [217.206.187.79]) by mx.google.com with ESMTPS id m8sm6692876gvf.2007.12.04.04.25.04 (version=SSLv3 cipher=RC4-MD5); Tue, 04 Dec 2007 04:25:05 -0800 (PST) From: Tom Evans To: Ivan Voras In-Reply-To: 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> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-ttJa0DwdTRxy3KbFuHns" Date: Tue, 04 Dec 2007 12:25:03 +0000 Message-Id: <1196771103.71694.8.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.10.2 FreeBSD GNOME Team Port Cc: freebsd-stable@freebsd.org 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 12:25:09 -0000 --=-ttJa0DwdTRxy3KbFuHns Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2007-12-04 at 13:00 +0100, Ivan Voras wrote: > Krassimir Slavchev wrote: >=20 > > There is another report for such problems: > >=20 > > http://blog.insidesystems.net/articles/2007/04/09/what-did-i-do-wrong >=20 > Of course - FreeBSD 6.x is really bad at SMP where number of CPUs is > larger then about 2 and the loads include much kernel work (e.g. IO, > context switches). Numeric tasks (SSL) don't depend on the kernel and so > they scale ok. See > http://people.freebsd.org/~kris/scaling/Scalability%20Update.pdf for > details. >=20 > Another issue is interesting in this thread: that apparently 7.0 also > has a well defined workload where it fails. >=20 There is also his follow up to that post, comparing postgres on 6.2 with 7.0 (ULE and 4BSD schedulers). http://blog.insidesystems.net/articles/2007/04/11/postgresql-scaling-on-6-2= -and-7-0 I'm very excited about getting some 7.0 servers into testing prior to deployment as production mysql boxes. Having run 7-CURRENT on my lappy for best part of 15 months, I think its supersmashinggreat :) Tom --=-ttJa0DwdTRxy3KbFuHns Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQBHVUcalcRvFfyds/cRAjxvAJ4vCOAzCl+wo7qKSHlPXcV/6wmtZwCdG6fh J+jqyDvynP0FaX7Y9X3WkvA= =Lixa -----END PGP SIGNATURE----- --=-ttJa0DwdTRxy3KbFuHns--