Re: Updated performance results

[Steven Pratt <slpratt@austin.ibm.com>]

Chris Mason wrote:
> On Thu, Sep 17, 2009 at 05:04:11PM -0500, Steven Pratt wrote:
>   
>> Chris Mason wrote:
>>     
>>> On Thu, Sep 17, 2009 at 04:17:14PM -0400, Chris Mason wrote:
>>>       
>>>> [ crashes on runs involving unmounts ]
>>>>
>>>> The run is still going here, but it has survived longer than before.
>>>> I'm trying with Yan Zheng's patch:
>>>>
>>>> From: Yan Zheng <zheng.yan@oracle.com>
>>>> Date: Fri, 11 Sep 2009 16:11:19 -0400
>>>> Subject: [PATCH] Btrfs: improve async block group caching
>>>>         
>>> Quick update, I got through a full run of Steve's test with this
>>> applied.  I'll start  a few more ;)
>>>       
>> Seems to work for me too!  Got through all the random write tests
>> with no problems. Will kick off full run overnight.
>>     
>
> Thanks again.
>
> I've updated the btrfs-unstable tree to include Yan Zheng's fix.  I've
> also included two more buffered writeback speedups, and I expect these
> to make a difference on the multi-threaded tests.
>
> I took a look at 1MB O_DIRECT writes, and the latencies of sending off
> checksumming to the checksum threads seem to be the biggest problem.  I
> get full tput at 8MB O_DIRECT writes, so for now I'm going to leave this
> one alone.
>   
Updated performance results are available.  Ran both the 9/16 tree + 
async patches and the tree from 9/18.  Results are a mixed bag, some 
faster some slower.

http://btrfs.boxacle.net/repository/raid/history/History.html

Steve

> -chris
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>