|Subject:||Re: xfs_fsr, sunit, and swidth|
|From:||Dave Hall <kdhall@xxxxxxxxxxxxxx>|
|Date:||Fri, 29 Mar 2013 15:59:46 -0400|
|Cc:||"xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>|
|References:||<5140C147.7070205@xxxxxxxxxxxxxx> <514113C6.9090602@xxxxxxxxxxxxxxxxx> <514153ED.3000405@xxxxxxxxxxxxxx> <5141C1FC.4060209@xxxxxxxxxxxxxxxxx> <5141C8C1.2080903@xxxxxxxxxxxxxxxxx> <5141E5CF.10101@xxxxxxxxxxxxxx> <5142AE40.6040408@xxxxxxxxxxxxxxxxx> <20130315114538.GF6369@dastard> <5143F94C.1020708@xxxxxxxxxxxxxxxxx> <20130316072126.GG6369@dastard> <515082C3.2000006@xxxxxxxxxxxxxx> <515361B5.8050603@xxxxxxxxxxxxxxxxx>|
|User-agent:||Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:220.127.116.11) Gecko/20121215 Icedove/3.0.11|
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@xxxxxxxxxxxxxx 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.
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