Date: Thu, 25 Nov 2010 11:03:37 -0500 From: jhell <jhell@DataIX.net> To: Adam Vande More <amvandemore@gmail.com> Cc: freebsd-stable@freebsd.org, Andriy Gapon <avg@FreeBSD.org> Subject: Re: top io mode Message-ID: <4CEE88D9.4070200@DataIX.net> In-Reply-To: <AANLkTikrKevf3x4nyi6=8Yz0BW=yZzf0W_Xa3XGQXy8N@mail.gmail.com> References: <AANLkTikrKevf3x4nyi6=8Yz0BW=yZzf0W_Xa3XGQXy8N@mail.gmail.com>
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On 11/25/2010 06:28, Adam Vande More wrote: > top io doesn't seem to display stats when dealing direct with a block device > like so: > > dd if=/dev/ada0 of=/dev/null > > However if dd runs on a regular file eg > > dd if=test.file of=/dev/null > > then stats are reported in top. > > Is this the expected behavior? > Is this on ZFS ? If that is the case it is a known problem that needs the following patch to fix the issue. http://people.freebsd.org/~avg/zfs-ru.diff I believe it is planned to be MFC'd but am not quite sure so I have CC'd Andriy and he should be able to advise further. Regards, -- jhell,v
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