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Date:      Thu, 23 Dec 2010 19:21:30 +0000
From:      Bruce Cran <bruce@cran.org.uk>
To:        Alexander Best <arundel@freebsd.org>
Cc:        freebsd-bugs@FreeBSD.org
Subject:   Re: kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net)
Message-ID:  <20101223192130.00007b30@unknown>
In-Reply-To: <20101223183720.GA84742@freebsd.org>
References:  <201012121110.oBCBABjm057751@freefall.freebsd.org> <20101212111844.7510053e@core.draftnet> <20101212121923.GA61077@freebsd.org> <20101223103220.0000483f@unknown> <20101223183720.GA84742@freebsd.org>

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On Thu, 23 Dec 2010 18:37:20 +0000
Alexander Best <arundel@freebsd.org> wrote:

> is this output right at the beginning normal?
> 
> fio: this platform does not support process shared mutexes, forcing
> use of threads. Use the 'thread' option to get rid of this warning.
> f1: (g=0): rw=write, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 ...
> f1: (g=0): rw=write, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
> fio: this platform does not support process shared mutexes, forcing
> use of threads. Use the 'thread' option to get rid of this warning.
> f2: (g=1): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 ...
> f2: (g=1): rw=randwrite, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
> fio: this platform does not support process shared mutexes, forcing
> use of threads. Use the 'thread' option to get rid of this warning.
> f3: (g=2): rw=read, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 ...
> f3: (g=2): rw=read, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
> fio: this platform does not support process shared mutexes, forcing
> use of threads. Use the 'thread' option to get rid of this warning.
> f4: (g=3): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1 ...
> f4: (g=3): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
> Starting 12 threads and 4 processes

Yes - it just means that FreeBSD doesn't support pshared mutexes. You
can add "thread" to the job file to stop the warning.

-- 
Bruce Cran



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