Date: Mon, 05 Aug 2013 17:15:16 -0400 From: Dave Mischler <dave@mischler.com> To: freebsd-stable@freebsd.org Subject: unexpected idprio 31 behavior on 9.2-BETA2 and 9.2-RC1 Message-ID: <1375737316.96778.10.camel@firkin.mischler.com>
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I have an i5-2500 machine 8GB RAM now running 9.2-RC1 amd64 with the GENERIC kernel. Today, while still running 9.2-BETA2, I updated my source tree and started building world with idprio 31 and I looked back a while later and all the CPU cores and disk were essentially idle, and hardly any progress had been made on the build. I stopped and restarted the build without the idle priority setting and it ran fine. Anybody else seen any of this? Anybody know about any fairly recent changes that might account for it? I did a "rm -rf /usr/src /usr/obj" and loaded a new source tree before going to RC1. I still see odd behavior at RC1. Sometimes it works just like it should (i.e. compute bound processes use most/all of the available CPU time), but a lot of the time both the CPU and disk are idle (e.g. CPU 97.8% idle, disk 1% busy per systat). I don't think I ever saw this behavior before while running "make buildworld -j4". Can anyone else confirm/rebut my findings? Thanks.
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