On Mon, Mar 25, 2013 at 01:00:51PM -0400, Dave Hall wrote: > > Dave Hall > Binghamton University > kdhall@xxxxxxxxxxxxxx > 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). Just run 'perf top -U' for 10s while the problem is occurring and pastebin the output.... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
