xfs_fsr, sunit, and swidth

[Dave Hall]

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


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).

Also, what would you like me to do with the xfs_db freesp output for 26 
agroups?

-Dave