From owner-freebsd-current@FreeBSD.ORG Thu Jul 7 01:17:53 2011 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5B392106566B; Thu, 7 Jul 2011 01:17:53 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-yx0-f182.google.com (mail-yx0-f182.google.com [209.85.213.182]) by mx1.freebsd.org (Postfix) with ESMTP id 042418FC12; Thu, 7 Jul 2011 01:17:52 +0000 (UTC) Received: by yxl31 with SMTP id 31so267877yxl.13 for ; Wed, 06 Jul 2011 18:17:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=E9XOMdszKKqzGK1cYgELmkkcyQ8dYw5WfyPvaQqN5Ac=; b=ay/AoGRovVGYdFiDsXbpGfaTLQhBVId3nyN2nSfrMvW5VGp1KgwMFNB4QRsZYVcMlx irdLZ1qCeMzOJYPP+4zJqEycjOQjVJc4y6lwpngWwSGs1dSypbNpyjpgCUltEByqk/xF LFmY0Ov9Z5IQoQ2nJKrTx0Act3beit73p0TFA= MIME-Version: 1.0 Received: by 10.151.50.15 with SMTP id c15mr422480ybk.285.1310001471988; Wed, 06 Jul 2011 18:17:51 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.151.45.11 with HTTP; Wed, 6 Jul 2011 18:17:51 -0700 (PDT) In-Reply-To: <4E14CCE5.4050906@zedat.fu-berlin.de> References: <4E1421D9.7080808@zedat.fu-berlin.de> <4E147F54.40908@zedat.fu-berlin.de> <20110706162811.GA68436@troutmask.apl.washington.edu> <20110706193636.GA69550@troutmask.apl.washington.edu> <4E14CCE5.4050906@zedat.fu-berlin.de> Date: Thu, 7 Jul 2011 09:17:51 +0800 X-Google-Sender-Auth: EVssv602mp82_wZrdzCfA3SfsQU Message-ID: From: Adrian Chadd To: "Hartmann, O." Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Arnaud Lacombe , FreeBSD Current , arrowdodger <6yearold@gmail.com>, Steve Kargl , freebsd-questions@freebsd.org Subject: Re: Heavy I/O blocks FreeBSD box for several seconds X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Jul 2011 01:17:53 -0000 Offer a bounty for getting it fixed? thanks, Adrian On 7 July 2011 05:00, Hartmann, O. wrote: > On 07/06/11 21:36, Steve Kargl wrote: >> >> On Wed, Jul 06, 2011 at 03:18:35PM -0400, Arnaud Lacombe wrote: >>> >>> Hi, >>> >>> On Wed, Jul 6, 2011 at 12:28 PM, Steve Kargl >>> =A0wrote: >>>> >>>> On Wed, Jul 06, 2011 at 05:29:24PM +0200, O. Hartmann wrote: >>>>> >>>>> I use SCHED_ULE on all machines, since it is supposed to be performin= g >>>>> better on multicore boxes, but there are lots of suggestions switchin= g >>>>> back to the old SCHED_4BSD scheduler. >>>>> >>>> If you are using MPI in numerical codes, then you want >>>> to use SCHED_4BSD. ?I've posted numerous times about ULE >>>> and its very poor performance when using MPI. >>>> >>>> >>>> http://lists.freebsd.org/pipermail/freebsd-hackers/2008-October/026375= .html >>>> >>> [sarcasm] >>> It is rather funny to see that the post you point out has generated >>> exactly 0 meaningful follow-up then and as you mention later in this >>> thread, the issue still remains today :-) >>> [/sarcasm] >>> >> Apparently, you are privy to my private email exchanges >> with jeffr. >> >> I'm also not sure why you're being sarcastic here. =A0The >> issue was and AFAIK still is a problem for anyone using >> FreeBSD in a HPC cluster. =A0ULE simply performs worse than >> 4BSD. >> > Well, I know only very little people using FreeBSD within a HPC cluster o= r > even for scientific purposes, except myself and some people around here. > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " >