Date: Fri, 24 Dec 2010 11:27:40 +0000 From: Alexander Best <arundel@freebsd.org> To: Bruce Cran <bruce@cran.org.uk> Cc: freebsd-bugs@FreeBSD.org Subject: Re: kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net) Message-ID: <20101224112740.GA99003@freebsd.org> In-Reply-To: <20101223192130.00007b30@unknown> References: <201012121110.oBCBABjm057751@freefall.freebsd.org> <20101212111844.7510053e@core.draftnet> <20101212121923.GA61077@freebsd.org> <20101223103220.0000483f@unknown> <20101223183720.GA84742@freebsd.org> <20101223192130.00007b30@unknown>
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On Thu Dec 23 10, Bruce Cran wrote: > 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. thanks for the hint. have you verified that this behavior only occurs on systems with a dual core cpu? is it possible to disable one core and see if the behavior is also reproducable then? i'd like to test this, but i don't know the magic juju to disable one of my cpu cores. :( cheers. alex > > -- > Bruce Cran -- a13x
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