Date: Sun, 28 Aug 2011 01:15:01 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: Identifying disk activity Message-ID: <CA%2BtpaK3Y8q1A=jEEEZmn%2BOfn6QVVYN%2BdLxNj59fKQRu0baxaGw@mail.gmail.com> In-Reply-To: <20110828073051.1ec5b66a.freebsd@edvax.de> References: <20110828073051.1ec5b66a.freebsd@edvax.de>
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On Sun, Aug 28, 2011 at 12:30 AM, Polytropon <freebsd@edvax.de> wrote: > I am not sure this is related to a program, but I'd like to > find it out. As FreeBSD's I/O subsystem does not work in > real-time, I cannot conclude from actual program file I/O > to physical disk I/O. > > Is there a way to force "synchronous disk activity"? > well there is the mount -o sync option. > > My idea is to watch open files and running programs as > precise as possible (as root: "top -St -s 0"). Which > tools (e. g. top, htop, lsof) would you suggest to narrow > down _which_ program is accessing _which_ file, causing > the sound? > "top -Hm io " has revealed pesky apps in the past for me without using mount options. IIRC, you have to use procstat to find if something is using swap. -- Adam Vande More
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