Re: xfs_fsr, sunit, and swidth

Dave Hall
2013-03-29T19:59:56Z

Dave, Stan,

Here is the link for perf top -U: http://pastebin.com/JYLXYWki. The ag
report is at http://pastebin.com/VzziSa4L. Interestingly, the backups
ran fast a couple times this week. Once under 9 hours. Today it looks
like it's running long again.

-Dave

Dave Hall
Binghamton University
kdhall@binghamton.edu
607-760-2328 (Cell)
607-777-4641 (Office)

On 03/27/2013 05:16 PM, Stan Hoeppner wrote:
> On 3/25/2013 12:00 PM, Dave Hall wrote:
>
>> On 03/16/2013 03:21 AM, Dave Chinner wrote:
>>
>>> Using perf to profile the kernel while the cp -al workload is
>>> running will tell use exactly where the CPU is being burnt. That
>>> will confirm the analysis, or point us at some other issue that is
>>> causing excessive CPU burn...
>>>
>>>
>> Dave, which perf command(s) would you like me to run. (I'm familiar
>> with the concept behind this kind of tool, but I haven't worked with
>> this one before).
>>
> I'll let Dave answer this one.
>
>
>> Also, what would you like me to do with the xfs_db freesp output for 26
>> agroups?
>>
> A pastebin link should be fine. Only a couple of people will be looking
> at it. I don't see value in free space maps of 26 AGs being archived.
>
> FWIW, it's probably best to reply-all instead of just to the list.
> Sometimes posts get lost in the noise. Not sure if that's the case
> here, but it's been a couple of days with no response from Dave C, and
> the answers to these questions are very short. Thus I'm guessing he
> missed your post, so I'm CC'ing him here.