From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Pratt <slpratt@austin.ibm.com>
Subject: Re: Updated performance results
Date: Wed, 16 Sep 2009 13:37:08 -0500
Message-ID: <4AB13054.6050803@austin.ibm.com>
References: <4A9C0D19.5010108@austin.ibm.com> <20090911192955.GB2894@think> <4AAAC2B6.8040105@austin.ibm.com> <20090914135130.GE8839@think> <4AAEB89C.3040100@austin.ibm.com> <20090916005225.GG23965@think> <4AB1010F.70001@austin.ibm.com> <4AB12702.30601@austin.ibm.com> <20090916180719.GE2641@think> <4AB12B98.9050708@austin.ibm.com> <20090916182022.GG2641@think>
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To: Chris Mason <chris.mason@oracle.com>,
	Steven Pratt <slpratt@austin.ibm.com>,
	Eric Whitney <eric.whitney@hp.com>,
	linux-btrfs <linux-btrfs@vger.kernel.org>
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <20090916182022.GG2641@think>
List-ID: <linux-btrfs.vger.kernel.org>

Chris Mason wrote:
> On Wed, Sep 16, 2009 at 01:16:56PM -0500, Steven Pratt wrote:
>   
>> Chris Mason wrote:
>>     
>>> On Wed, Sep 16, 2009 at 12:57:22PM -0500, Steven Pratt wrote:
>>>       
>>>> Steven Pratt wrote:
>>>>         
>>>>> Chris Mason wrote:
>>>>>           
>>>>>> On Mon, Sep 14, 2009 at 04:41:48PM -0500, Steven Pratt wrote:
>>>>>>             
>>>>>>> Only bit of bad news is I did get one error that crashed the system
>>>>>>> on single threaded nocow run. So that data point is missing.
>>>>>>> Output below:
>>>>>>>               
>>>>>> I hope I've got this fixed.  If you pull from the master branch of
>>>>>> btrfs-unstable there are fixes for async thread races.  The single
>>>>>> patch I sent before is included, but not enough.
>>>>>>             
>>>>> Glad you said that.  Keeps me from sending the email that said the
>>>>> patch didn't help :-)
>>>>>
>>>>> Steve
>>>>>           
>>>> Well, still getting oopses even with new code.
>>>>
>>>> Lots of:
>>>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] BUG: soft lockup -
>>>> CPU#10 stuck for 61s! [btrfs-endio-1:30250]
>>>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] Pid: 30250, comm:
>>>> btrfs-endio-1 Not tainted 2.6.31-autokern1 #1 IBM x3950-[88726RU]-
>>>> Sep 16 11:07:27 btrfs1 kernel: [ 1862.942754] RIP:
>>>> 0010:[<ffffffff81153920>]  [<ffffffff81153920>] crc32c+0x20/0x26
>>>>         
>>> If I'm reading this right, you've got a softlockup in crc32c?  Something
>>> has gone really wrong here.  Are you reusing datasets from old runs?
>>>       
>> From the second machine a single bug:
>> Sep 16 11:53:42 btrfs2 kernel: [ 3769.298240] ------------[ cut here
>>     
>
> Ok, which mount options and job file is this from?
>
>   
mount -t btrfs  /dev/ffsbdev1 /mnt/ffsb1'
[20090916-11:47:37.738883526] PROCESSING COMMAND : 'run 
random_writes__threads_0001 ffsb 
http://hks.austin.ibm.com/users/corry/btrfs/ffsb/profiles/btrfs2/random_writes.ffsb 
num_threads=1'


So , this is single disk machine, running single threaded random write 
workload.  Buffered, not odirect.

I'm packaging up full messages file, repeated errros makes it big. Will 
send separately.

Steve



> -chris
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