From owner-freebsd-performance@FreeBSD.ORG Sun Jul 24 19:02:35 2011 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 335A2106564A for ; Sun, 24 Jul 2011 19:02:35 +0000 (UTC) (envelope-from nec556@retena.com) Received: from resmaa14.ono.com (smtp14.ono.com [62.42.230.176]) by mx1.freebsd.org (Postfix) with ESMTP id B40C18FC08 for ; Sun, 24 Jul 2011 19:02:34 +0000 (UTC) Received: from GogPortatil.retena.com (188.76.0.243) by resmaa14.ono.com (8.5.113) (authenticated as nec556@retena.com) id 4D7F86D50198D837 for freebsd-performance@freebsd.org; Sun, 24 Jul 2011 20:51:02 +0200 Message-ID: <4D7F86D50198D837@> (added by postmaster@resmaa14.ono.com) X-Mailer: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Sun, 24 Jul 2011 20:50:14 +0200 To: freebsd-performance@freebsd.org From: Eduardo Morras In-Reply-To: <5C3302CF-8EE7-489E-8D31-624DA1637B73@mac.com> 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> <20110707015151.GB71966@troutmask.apl.washington.edu> <20110707031151.GA72452@troutmask.apl.washington.edu> <4E155A84.1010100@FreeBSD.org> <4E163856.2050300@zedat.fu-berlin.de> <5C3302CF-8EE7-489E-8D31-624DA1637B73@mac.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-Antivirus: AVG for E-mail 10.0.1390 [1518/3785] Subject: Re: Heavy I/O blocks FreeBSD box for several seconds 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, 24 Jul 2011 19:02:35 -0000 At 01:15 08/07/2011, you wrote: >On Jul 7, 2011, at 3:51 PM, Hartmann, O. wrote: > > This is quibbling. On heavy loads on networ, disk et cetera, > isn't there always and also a CPU bound load? > >No. Properly written software blocks when waiting on network or >disk I/O, and doesn't sit there spinning in a busy-wait consuming >CPU until it actually gets more work to do. > >See select(2), kqueue(2), and friends. > >Regards, Excuse me, but where (which maillist) and when did this mail thread started? I have searched this maillist archive and freebsd-hackers but no success. TIA >-- >-Chuck