Date: Thu, 24 Jan 2008 09:38:10 -0600 From: Bruce Albrecht <bruce@zuhause.org> To: freebsd-current@freebsd.org Subject: Weird performance behaviour in 7.0 Message-ID: <18328.45282.562906.708945@celery.zuhause.org>
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This is my first Q6600 based system, and my first 7.0 system, and my first AMD-64 system and my first ZFS base system, and I'm seeing something really strange. Every now and then, processes run really slowly, like at 1/600th (or worse) than it ought to, but it racks up the CPU time as though it's running full tilt. For example, I have this little test program that just does a tight loop, and most times, it takes about 3 seconds to complete, but right now, it's taking about 2000 seconds to complete. Right now, it's consistently running slow, but sometimes it will run slow, but I can terminate it and start another one which will run at normal speed. Currently sysctl reports: dev.cpu.0.freq: 2400 dev.cpu.0.temperature: 55 dev.cpu.1.temperature: 57 dev.cpu.2.temperature: 51 dev.cpu.3.temperature: 54 What might be causing this? What information is pertinent for inclusion in a problem report?
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