Date: Thu, 23 Dec 2010 10:32:20 +0000 From: Bruce Cran <bruce@cran.org.uk> To: Alexander Best <arundel@freebsd.org> Cc: freebsd-bugs@FreeBSD.org Subject: Re: kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net) 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>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, 12 Dec 2010 12:19:23 +0000 Alexander Best <arundel@freebsd.org> wrote: > On Sun Dec 12 10, Bruce Cran wrote: > > On Sun, 12 Dec 2010 11:10:11 GMT > > Alexander Best <arundel@freebsd.org> 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
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20101223103220.0000483f>