Re: [PATCHSET 00/12] perf tools: Apply percent-limit to callchains

[Jiri Olsa]

On Tue, Jan 26, 2016 at 11:49:07PM +0900, Namhyung Kim wrote:

SNIP

> >                __hrtimer_run_queues
> >                tick_sched_timer
> >                tick_sched_handle.isra.17
> >                update_process_times
> >                scheduler_tick
> >                perf_event_task_tick
> >                perf_pmu_enable.part.87
> >                x86_pmu_enable
> >                intel_pmu_enable_all
> >                intel_bts_enable_local
> > 
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] perf_pmu_enable.part.87     
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] perf_event_context_sched_in 
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] perf_event_exec             
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] setup_new_exec              
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] load_elf_binary             
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] search_binary_handler       
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] do_execveat_common.isra.33  
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] sys_execve                  
> >      0.08%     0.00%  perf     [kernel.vmlinux]  [k] return_from_execve          
> >      0.08%     0.00%  perf     [unknown]         [k] 0x00007f2175b35e07          
> >      0.04%     0.00%  perf     [kernel.vmlinux]  [k] perf_event_nmi_handler      
> >      0.04%     0.00%  perf     [kernel.vmlinux]  [k] nmi_handle                  
> >      0.04%     0.00%  perf     [kernel.vmlinux]  [k] default_do_nmi              
> >      0.04%     0.00%  perf     [kernel.vmlinux]  [k] do_nmi                      
> >      0.04%     0.00%  perf     [kernel.vmlinux]  [k] end_repeat_nmi              
> >      0.04%     0.04%  perf     [kernel.vmlinux]  [k] x86_pmu_enable              
> >      0.04%     0.04%  perf     [kernel.vmlinux]  [k] native_apic_mem_write       
> > 
> 
> What's the problem?  Now by default callchains under 0.5% (absolute)
> will not be shown.  I think this is intended output, and we need to
> consider changing the default percent limit.

hm, just the TUI shows +- for entries with no callchain

jirka