linux-kernel - Re: perf top -g -U --sort=symbol --children == lalalalala?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 11 Sep 2014 17:09:22 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Mike Galbraith <umgwanakikbuti@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: perf top -g -U --sort=symbol --children == lalalalala?

On Tue, Sep 9, 2014 at 10:37 PM, Arnaldo Carvalho de Melo
<acme@...stprotocols.net> wrote:
> Em Tue, Sep 09, 2014 at 01:54:01PM +0200, Mike Galbraith escreveu:
>> Seems the now default on --children thingy doesn't like -U much.
>
> Namhyung, can you please take a look at this?

So what is the problem here?


>
>> Samples: 5K of event 'cycles', Event count (approx.): 2268660922
>>   Children      Self  Symbol
>> +   46.42%     0.04%  [k] system_call_fastpath
>> +   27.12%     0.80%  [k] apic_timer_interrupt
>> +   26.26%     0.23%  [k] smp_apic_timer_interrupt
>> +   20.43%     0.13%  [k] local_apic_timer_interrupt
>> +   20.20%     0.74%  [k] hrtimer_interrupt
>> +   18.01%     0.39%  [k] __run_hrtimer
>> +   14.43%     0.35%  [k] tick_sched_timer
>> +   13.60%     0.05%  [k] sys_poll
>> +   13.09%     1.16%  [k] do_sys_poll
>> +   12.16%     0.08%  [k] tick_sched_handle.isra.16
>> +   11.70%     0.32%  [k] update_process_times
>> +   11.41%     0.03%  [k] sys_read
>> +   11.17%     0.11%  [k] vfs_read
>> +   10.85%     0.09%  [k] seq_read
>> +    8.27%     0.09%  [k] proc_single_show
>> +    7.79%     1.19%  [k] page_fault
>> +    7.01%     0.25%  [k] scheduler_tick
>> +    6.26%     0.11%  [k] __do_page_fault
>> +    5.97%     1.33%  [k] do_task_stat
>> +    5.91%     0.23%  [k] handle_mm_fault
>> +    5.40%     0.20%  [k] do_sys_open
>> +    5.02%     0.09%  [k] ret_from_intr
>> +    4.94%     0.05%  [k] do_IRQ
>> +    4.70%     0.14%  [k] path_openat
>> +    4.69%     0.62%  [k] tty_poll
>> +    4.69%     0.16%  [k] irq_exit
>> +    4.49%     0.63%  [k] __do_softirq
>> +    4.27%     0.12%  [k] __alloc_pages_nodemask
>> +    3.95%     0.03%  [k] handle_irq_event_percpu
>> +    3.51%     0.71%  [k] __fget_light
>> +    3.47%     0.04%  [k] sys_select
>> +    3.39%     0.08%  [k] seq_printf
>> +    3.37%     0.07%  [k] sys_open
>> +    3.34%     0.11%  [k] seq_vprintf
>> +    3.22%     0.02%  [k] core_sys_select
>> +    3.15%     0.26%  [k] do_select
>> +    3.15%     3.15%  [k] _raw_spin_lock
>>
>>



-- 
Thanks,
Namhyung Kim
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/