Date: Fri, 15 Sep 2006 11:07:52 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Ian Smith <smithi@nimnet.asn.au> Cc: "Tamouh H." <hakmi@rogers.com>, questions@freebsd.org, Giorgos Keramidas <keramida@freebsd.org> Subject: Re: Top not showing cpu usage even remotely accurately Message-ID: <20060915160752.GC55663@dan.emsphone.com> In-Reply-To: <Pine.BSF.3.96.1060915193930.29169A-100000@gaia.nimnet.asn.au> References: <20060914142023.GB91336@dan.emsphone.com> <Pine.BSF.3.96.1060915193930.29169A-100000@gaia.nimnet.asn.au>
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In the last episode (Sep 15), Ian Smith said: > On Thu, 14 Sep 2006, Dan Nelson wrote: > > I would guess that maybe xmms (or some other threaded app) is your > > hidden CPU consumer. The kernel does not calculate %CPU correctly > > for libkse-threaded programs, and they usually show up as 0% all > > the time. The TIME column does update correctly, though. If you > > switch to libthr with libmap.conf, you'll get accurate threaded > > %CPU reporting. > > I assume then that libkse is what the three multi-thread programs I'm > running (xmms, mozilla-bin and mysqld) are now using, where for each > of them `ldd $program | grep thr` shows > libpthread.so.1 => /usr/lib/libpthread.so.1 > > So can/should I set in (a new) /etc/libmap.conf generally: > libpthread.so.1 libthr.so.1 > libpthread.so libthr.so > > or would it be better to just target these specific programs, eg: > > [/usr/X11R6/lib/mozilla/mozilla-bin/] # assuming loaded with full path? > libpthread.so.1 libthr.so.1 > libpthread.so libthr.so > > Are there any likely downsides to using libthr instead? Esp. mysqld? Ya, libkse was the name of the default thread library before it was renamed to "libpthread". I use a global map (like in your first example) myself. I have a lightly-used mysql database on my machine and haven't noticed any problems with it or any other threaded apps. -- Dan Nelson dnelson@allantgroup.com
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