Date: Wed, 4 Apr 2012 08:48:42 -0700 From: Freddie Cash <fjwcash@gmail.com> To: Matt Thyer <matt.thyer@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: 157k interrupts per second causing 60% CPU load on idle system Message-ID: <CAOjFWZ5nhT5NPLnn_Bh7oDa0fC5KbfDE1aHA_e%2BX9iebxkLEaA@mail.gmail.com> In-Reply-To: <CACM2%2B-7DrENh5ZBs-6vkSrH1szMqnYKi2acmzByAOgXdZvHZMg@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>
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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. I have a 9-STABLE box with 24x WDC WD2002FAEX SATA3 (6 Gbps) drives attached to 3 SuperMicro AOC-USAS2-8Li controllers, using the new mps(4) driver without any issues. Was actually amazed yesterday when I say it doing writes just shy of 500 MBps to the ZFS pool, via zfs send/recv from another box. No issues with excessive interrupts. Using 10.0 firmware on the controllers. -- Freddie Cash fjwcash@gmail.com
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