Consistent throughput challenge -- fragmentation?

[Brian Cain]

On Mon, Feb 25, 2013 at 4:18 PM, Brian Cain <brian.cain at gmail.com> wrote:

> Here's the info from the FAQ, I'll bundle up the benchmarks.
>
>
> On Mon, Feb 25, 2013 at 4:16 PM, Dave Chinner <david at fromorbit.com> wrote:
>
>> Post your benchmark script, along with the results you see, and all
>> the other information listed here:
>>
>>
>> http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F
>>
>
Attached is the script which runs the benchmark.  It refers to a
"/usr/bin/write-bench" which I will work on seeing how I can share.  But it
does little more than allocate a buffer, read into it from /dev/urandom,
then "open(O_DIRECT)/write(16MB)/write(16MB)/.../write(16MB)/close()" and
measure the duration of the write() calls using gettimeofday() or
clock_gettime(CLOCK_MONOTONIC).

-- 
-Brian
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://oss.sgi.com/pipermail/xfs/attachments/20130225/29867a5c/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: wb-model
Type: application/octet-stream
Size: 896 bytes
Desc: not available
URL: <http://oss.sgi.com/pipermail/xfs/attachments/20130225/29867a5c/attachment.obj>