Re: [PATCH 14/14] perf script: show overhead events

[Jiri Olsa]

On Wed, Nov 23, 2016 at 04:44:52AM -0500, kan.li...@intel.com wrote:
> From: Kan Liang <kan.li...@intel.com>
> 
> Introduce a new option --show-overhead to show overhead events in perf
> script

            perf  7356 [001]  7292.203517:     482010 cycles:pp:  
ffffffff818e2150 _raw_spin_unlock_irqrestore+0x40 
(/lib/modules/4.9.0-rc1+/build/vmlinux)
PERF_RECORD_USER_OVERHEAD [USER WRITE] nr: 1995  time: 14790661 cpu 1
PERF_RECORD_USER_OVERHEAD [ELAPSED TIME] time: 2721649901
            perf  7356 [001]  7292.203766:     482076 cycles:pp:  
ffffffff81117f17 lock_release+0x37 (/lib/modules/4.9.0-rc1+/build/vmlinux)

I guess those 2 overhead events dont have context..?
should we make sure they are the last events?

thanks,
jirka