Date: Sat, 7 Apr 2012 14:31:53 +0930 From: Matt Thyer <matt.thyer@gmail.com> To: Freddie Cash <fjwcash@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system Message-ID: <CACM2%2B-5ujs-kz9SNV7jwEU4Df5un5H=%2BqY%2B3Z0WSxj=7v8f8uQ@mail.gmail.com> In-Reply-To: <CAOjFWZ5nhT5NPLnn_Bh7oDa0fC5KbfDE1aHA_e%2BX9iebxkLEaA@mail.gmail.com> References: <CACM2%2B-46zHafjZo0O1dNNvEJm%2B2sUcYboBWwhJ8NxVhXyvpBZQ@mail.gmail.com> <4F6A67C0.7000909@sentex.net> <CACM2%2B-6BubOF1uWtXcBQyZqeiuqhvXazL9564CwN9uhJVNe2_w@mail.gmail.com> <4F6B3B46.4060105@sentex.net> <CACM2%2B-6J%2BkaV3aCudDNztDFefo602kTJZ-S99HB%2Bjhxe-tu5XA@mail.gmail.com> <CACM2%2B-7DrENh5ZBs-6vkSrH1szMqnYKi2acmzByAOgXdZvHZMg@mail.gmail.com> <CAOjFWZ5nhT5NPLnn_Bh7oDa0fC5KbfDE1aHA_e%2BX9iebxkLEaA@mail.gmail.com>
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On 5 April 2012 01:18, Freddie Cash <fjwcash@gmail.com> wrote: > On Wed, Apr 4, 2012 at 5:19 AM, Matt Thyer <matt.thyer@gmail.com> wrote: > > So it seems that both the old and new mps driver have a problem with the > > Western Digital WD20EARX SATA 3 drive on a SuperMicro AOC-USAS2-L8i (SAS > > 6G) controller (flashed with -IT firmware). > > I wouldn't say the driver has a problem with that specific drive. > More that it might have a problem with a mixed SATA2/SATA3 setup. > > Sorry, that's what I meant to say but it now seems that the 157K interrupts per second is probably not due to the SuperMicro AOC-USAS2-L8i. Since moving the SATA 3 disk to the onboard Intel SATA 2 controller I'm no longer having that disk evicted from the raidz2 pool with write errors and I thought that the high interrupt rate issue had also been solved but it's back again. This is on 8-STABLE at revision 230921 (before the new driver hit 8-STABLE). So now I need to go back to trying to determine what the cause is. I'll stop posting in this thread as I don't think it's anything to do with either the old or new version of this driver.
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