Date: Tue, 5 Jul 2011 09:20:05 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: manish jain <invalid.pointer@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: PID 11 using 400% CPU Message-ID: <20110705142004.GB6611@dan.emsphone.com> In-Reply-To: <CAEL0NofKym1WZ-wodQEXT7Dg6gO0FNuozVz=y%2BnSruh1O5qtQQ@mail.gmail.com> References: <4E0BF66F.9080800@gmail.com> <20110630045559.GD44024@dan.emsphone.com> <CAEL0NofKym1WZ-wodQEXT7Dg6gO0FNuozVz=y%2BnSruh1O5qtQQ@mail.gmail.com>
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In the last episode (Jul 05), manish jain said: > On 30 June 2011 10:26, Dan Nelson <dnelson@allantgroup.com> wrote: > > In the last episode (Jun 30), Manish Jain said: > > > > > > I have a strange problem with my 8.1 box. After booting, the hard > > > disk goes into a full-speed never-ending spin. > > > > To see what disk I/O is being done, try running "ktrace -dip 0 ; sleep > > 10 ; ktrace -C", to capture all syscalls done on the entire system (pid > > 0 plus children) for 10 seconds, then run "kdump -m64 | less" to view > > the results. Look for read or write calls. > > It looks like ppp is doing a lot of read and write operations, which keeps > the disk spinning. How do I set this right ? Is there something wrong > with my ppp.conf (see below) ? I bet that if you ran fstat or lsof on the ppp process, all the writes are actually to your serial device or a tun device, not to disk. ppp is unlikely to cause much disk I/O. You'll have to filter out the ppp process and check your kdump output again. -- Dan Nelson dnelson@allantgroup.com
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