From owner-freebsd-bugs@FreeBSD.ORG Thu Dec 23 10:32:38 2010 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4D79D1065672; Thu, 23 Dec 2010 10:32:38 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (muon.cran.org.uk [IPv6:2a01:348:0:15:5d59:5c40:0:1]) by mx1.freebsd.org (Postfix) with ESMTP id D4E3F8FC0A; Thu, 23 Dec 2010 10:32:37 +0000 (UTC) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id F1B92E729E; Thu, 23 Dec 2010 10:32:36 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=cran.org.uk; h=date:from :to:cc:subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; s=mail; bh=IzD3CGDgiN9O imj286LH+wjFkQA=; b=fE569dBmyauQ5pte4kZeWPWN4QAurgO78ZhFMjyhnWrk zfcuyhAcbxV5f4q5iUymWKi0ST5uI8b5RYerpmJ9M5N1Tg7BZg7GJdFuW7U1/uAh c/lYfJxVU4bC75KnqoUR2ZBp8a9oiJ/WH9eZufmJ4d2lICVNrw4CMfA78RkVhKg= DomainKey-Signature: a=rsa-sha1; c=nofws; d=cran.org.uk; h=date:from:to :cc:subject:message-id:in-reply-to:references:mime-version :content-type:content-transfer-encoding; q=dns; s=mail; b=CmSEma wqYUoOAL1s+W2t+TJD+x5Tqrm1ikwlnEAIRIvWrTGr+dMOpOinIkXXEDDje/lGp4 9KiV3Pm30pvCUGSDLcecdKBWKEuQGv/C5BodMv3ORWkFeVYrTa5u03BVbivkalB1 2Kk47YS7YKhL4cwc5dF3JnVkqA7+DgRBp/TMU= Received: from unknown (client-86-27-40-45.glfd.adsl.virginmedia.com [86.27.40.45]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA id BA4A1E71FF; Thu, 23 Dec 2010 10:32:36 +0000 (GMT) Date: Thu, 23 Dec 2010 10:32:20 +0000 From: Bruce Cran To: Alexander Best Message-ID: <20101223103220.0000483f@unknown> In-Reply-To: <20101212121923.GA61077@freebsd.org> References: <201012121110.oBCBABjm057751@freefall.freebsd.org> <20101212111844.7510053e@core.draftnet> <20101212121923.GA61077@freebsd.org> X-Mailer: Claws Mail 3.7.6 (GTK+ 2.16.0; i586-pc-mingw32msvc) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-bugs@FreeBSD.org Subject: Re: kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net) X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Dec 2010 10:32:38 -0000 On Sun, 12 Dec 2010 12:19:23 +0000 Alexander Best wrote: > On Sun Dec 12 10, Bruce Cran wrote: > > On Sun, 12 Dec 2010 11:10:11 GMT > > Alexander Best wrote: > > > > > i can confirm that a similar issue exists for me running a very > > > recent HEAD snapshot on amd64. when the disk is performing heavy > > > i/o (make -j8 buildworld e.g.) sound starts stuttering and the > > > system goes semi-responsive. mostly the mouse input (usb) is > > > lagging, but sometimes the cursor freezes in it's current > > > position for 10 seconds or so. > > > > There was a discussion recently where we noticed this problem > > appeared to occur mostly on systems with Intel Core 2 Duo CPUs. > > I've seen a login paused for over 5 seconds (between typing the > > password and the motd being displayed) due to an "svn up" on my > > laptop for example. A good way of triggering this seems to be running sysutils/fio with the configuration: [global] size=512m bsrange=4k-4k numjobs=4 [f1] rw=write [f2] stonewall rw=randwrite [f3] stonewall rw=read [f4] stonewall rw=randread It seems that about half-way through even fio stops doing any IO and doing an "ls" takes a couple of seconds. -- Bruce Cran