* Is it possible to get (or compute) the consummed CPU with perf ?
@ 2014-11-11 8:03 Jerome Correnoz
2014-11-18 17:31 ` Jerome Correnoz
0 siblings, 1 reply; 6+ messages in thread
From: Jerome Correnoz @ 2014-11-11 8:03 UTC (permalink / raw)
To: linux-perf-users
Hi,
We're interested to know the CPU load/usage on our ARMv7 embedded system
when running some use cases (e.g. simple video decode, double video
decode, etc.). By CPU load, I mean a way to measure the time when the
system was doing something else than Idle.
I've tried to get it from the performance counter statistics but couldn't
find a way to get it, do I miss something ?
Also tried to use perf for profiling the system (e.g. perf record -a). It
report very useful percentage for the running processes that we exploit to
detect hot spots. But It reports X% of the used CPU (nothing related to
Idle or "rest of CPU").
So, any way with perf to get this information (directly or indirectly with
few calculation) ?
Thanks by advance,
Jerome
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is it possible to get (or compute) the consummed CPU with perf ?
2014-11-11 8:03 Is it possible to get (or compute) the consummed CPU with perf ? Jerome Correnoz
@ 2014-11-18 17:31 ` Jerome Correnoz
2014-11-18 17:51 ` Milian Wolff
2014-11-18 18:08 ` David Ahern
0 siblings, 2 replies; 6+ messages in thread
From: Jerome Correnoz @ 2014-11-18 17:31 UTC (permalink / raw)
To: linux-perf-users
Jerome Correnoz <jerome.correnoz <at> st.com> writes:
>
> Hi,
>
> We're interested to know the CPU load/usage on our ARMv7 embedded system
> when running some use cases (e.g. simple video decode, double video
> decode, etc.). By CPU load, I mean a way to measure the time when the
> system was doing something else than Idle.
>
> I've tried to get it from the performance counter statistics but
couldn't
> find a way to get it, do I miss something ?
>
> Also tried to use perf for profiling the system (e.g. perf record -a).
It
> report very useful percentage for the running processes that we exploit
to
> detect hot spots. But It reports X% of the used CPU (nothing related to
> Idle or "rest of CPU").
>
> So, any way with perf to get this information (directly or indirectly
with
> few calculation) ?
>
> Thanks by advance,
> Jerome
>
>
Hi all,
Can someone please help on it ?
If not, thanks to redirect me to the right list to ask such question.
Regards,
Jerome
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is it possible to get (or compute) the consummed CPU with perf ?
2014-11-18 17:31 ` Jerome Correnoz
@ 2014-11-18 17:51 ` Milian Wolff
2014-11-18 18:08 ` David Ahern
1 sibling, 0 replies; 6+ messages in thread
From: Milian Wolff @ 2014-11-18 17:51 UTC (permalink / raw)
To: Jerome Correnoz; +Cc: linux-perf-users
On Tuesday 18 November 2014 17:31:47 Jerome Correnoz wrote:
> Jerome Correnoz <jerome.correnoz <at> st.com> writes:
> > Hi,
> >
> > We're interested to know the CPU load/usage on our ARMv7 embedded system
> > when running some use cases (e.g. simple video decode, double video
> > decode, etc.). By CPU load, I mean a way to measure the time when the
> > system was doing something else than Idle.
> >
> > I've tried to get it from the performance counter statistics but
>
> couldn't
>
> > find a way to get it, do I miss something ?
> >
> > Also tried to use perf for profiling the system (e.g. perf record -a).
>
> It
>
> > report very useful percentage for the running processes that we exploit
>
> to
>
> > detect hot spots. But It reports X% of the used CPU (nothing related to
> > Idle or "rest of CPU").
> >
> > So, any way with perf to get this information (directly or indirectly
>
> with
>
> > few calculation) ?
> >
> > Thanks by advance,
> >
> > Jerome
>
> Hi all,
>
> Can someone please help on it ?
Sadly I cannot help you, but just want to say that I'd also be interested in
this data. VTune e.g. shows these fancy per-thread CPU Time graphs which are
shown at the bottom of this image:
https://software.intel.com/sites/default/files/managed/ef/8d/VTune-overview-fig-01.png
If there'd be a way to get similar results from Linux perf, I bet it would be
very useful.
Bye
--
Milian Wolff
mail@milianw.de
http://milianw.de
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is it possible to get (or compute) the consummed CPU with perf ?
2014-11-18 17:31 ` Jerome Correnoz
2014-11-18 17:51 ` Milian Wolff
@ 2014-11-18 18:08 ` David Ahern
2014-11-26 18:24 ` Jerome Correnoz
1 sibling, 1 reply; 6+ messages in thread
From: David Ahern @ 2014-11-18 18:08 UTC (permalink / raw)
To: Jerome Correnoz, linux-perf-users
[-- Attachment #1: Type: text/plain, Size: 1228 bytes --]
On 11/18/14, 10:31 AM, Jerome Correnoz wrote:
> Jerome Correnoz <jerome.correnoz <at> st.com> writes:
>
>>
>> Hi,
>>
>> We're interested to know the CPU load/usage on our ARMv7 embedded system
>> when running some use cases (e.g. simple video decode, double video
>> decode, etc.). By CPU load, I mean a way to measure the time when the
>> system was doing something else than Idle.
>>
>> I've tried to get it from the performance counter statistics but
> couldn't
>> find a way to get it, do I miss something ?
>>
>> Also tried to use perf for profiling the system (e.g. perf record -a).
> It
>> report very useful percentage for the running processes that we exploit
> to
>> detect hot spots. But It reports X% of the used CPU (nothing related to
>> Idle or "rest of CPU").
>>
>> So, any way with perf to get this information (directly or indirectly
> with
>> few calculation) ?
Not exactly what you want but might be close:
git clone https://github.com/dsahern/linux
git checkout perf-full-monty
make -C tools/perf
perf sched record -ag -- sleep 1
perf sched timehist -S
shows the grains of sand (each sample) and then a runtime summary byt
task. Example report attached for box just running a few VMs.
David
[-- Attachment #2: timehist-ex --]
[-- Type: text/plain, Size: 29813 bytes --]
time cpu task name b/n time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ---- -------------------- --------- --------- ---------
5945680.837926 [11] <idle> 0.000 0.000 0.000
5945680.837967 [02] perf[25909] 0.000 0.000 0.000 poll_schedule_timeout do_sys_poll sys_poll system_call_fastpath __poll
5945680.838017 [11] perf[25910] 0.000 0.011 0.091 __cond_resched _cond_resched wait_for_common wait_for_completion stop_one_cpu
5945680.838035 [11] migration/11[60] 0.000 0.010 0.017 cpu_stopper_thread kthread kernel_thread_helper
5945680.838071 [10] <idle> 0.000 0.000 0.000
5945680.838627 [11] <idle> 0.109 0.000 0.591
5945680.838675 [11] kworker/11:0[2387] 0.000 0.007 0.047 worker_thread kthread kernel_thread_helper
5945680.838822 [10] sleep[25910] 0.053 0.000 0.750 do_nanosleep hrtimer_nanosleep sys_nanosleep system_call_fastpath __GI___libc_nanosleep
5945680.838836 [10] kworker/10:1[25017] 0.000 0.270 0.013 worker_thread kthread kernel_thread_helper
5945680.839650 [02] <idle> 0.000 0.000 1.683
5945680.839653 [10] <idle> 0.764 0.000 0.817
5945680.839669 [02] kworker/2:0[24394] 0.000 0.008 0.019 worker_thread kthread kernel_thread_helper
5945680.839670 [10] kworker/10:1[25017] 0.817 0.012 0.016 worker_thread kthread kernel_thread_helper
5945680.839672 [11] <idle> 0.047 0.000 0.997
5945680.839684 [11] kworker/11:0[2387] 0.997 0.005 0.012 worker_thread kthread kernel_thread_helper
5945680.843522 [05] <idle> 0.000 0.000 0.000
5945680.843720 [05] qemu-system-x86[10648/10642] 0.000 0.012 0.198 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.843737 [05] kworker/5:2[1822] 0.000 0.165 0.017 worker_thread kthread kernel_thread_helper
5945680.849210 [07] <idle> 0.000 0.000 0.000
5945680.849271 [07] qemu-system-x86[26110/26103] 0.000 0.014 0.060 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.849583 [07] <idle> 0.060 0.000 0.312
5945680.849662 [11] <idle> 0.012 0.000 9.978
5945680.849677 [11] kworker/11:0[2387] 9.978 0.010 0.014 worker_thread kthread kernel_thread_helper
5945680.849758 [01] <idle> 0.000 0.000 0.000
5945680.849774 [07] qemu-system-x86[26110/26103] 0.312 0.008 0.190 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.849912 [01] qemu-system-x86[26111/26103] 0.000 0.088 0.153 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.853973 [03] <idle> 0.000 0.000 0.000
5945680.854193 [09] <idle> 0.000 0.000 0.000
5945680.854211 [03] qemu-system-x86[10886/10882] 0.000 0.014 0.237 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.854296 [09] qemu-system-x86[10887/10882] 0.000 0.091 0.103 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945680.860643 [00] <idle> 0.000 0.000 0.000
5945680.860655 [00] kworker/0:0[9363] 0.000 0.031 0.012 worker_thread kthread kernel_thread_helper
5945680.872267 [06] <idle> 0.000 0.000 0.000
5945680.872366 [06] sendmail[1939] 0.000 0.013 0.098 poll_schedule_timeout do_select core_sys_select sys_select system_call_fastpath
5945680.872645 [06] <idle> 0.098 0.000 0.279
5945680.872660 [06] kworker/6:2[31603] 0.000 0.012 0.015 worker_thread kthread kernel_thread_helper
5945680.908105 [03] <idle> 0.237 0.000 53.893
5945680.908884 [03] irqbalance[1228] 0.000 0.012 0.779 do_nanosleep hrtimer_nanosleep sys_nanosleep system_call_fastpath [unknown]
5945680.908900 [03] kworker/3:1[98] 0.000 0.365 0.015 worker_thread kthread kernel_thread_helper
5945680.909630 [03] <idle> 0.794 0.000 0.730
5945680.909642 [03] kworker/3:1[98] 0.730 0.007 0.012 worker_thread kthread kernel_thread_helper
5945680.999567 [00] <idle> 0.012 0.000 138.911
5945680.999581 [00] kworker/0:0[9363] 138.911 0.023 0.014 worker_thread kthread kernel_thread_helper
5945681.016550 [00] <idle> 0.014 0.000 16.969
5945681.016564 [00] kworker/0:0[9363] 16.969 0.013 0.013 worker_thread kthread kernel_thread_helper
5945681.039607 [11] <idle> 0.014 0.000 189.929
5945681.039620 [11] kworker/11:0[2387] 189.929 0.036 0.013 worker_thread kthread kernel_thread_helper
5945681.051961 [06] <idle> 0.015 0.000 179.300
5945681.052128 [06] qemu-system-x86[10646/10642] 0.000 0.020 0.166 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.057602 [15] <idle> 0.000 0.000 0.000
5945681.057617 [15] kworker/15:1[110] 0.000 0.041 0.014 worker_thread kthread kernel_thread_helper
5945681.100411 [04] <idle> 0.000 0.000 0.000
5945681.100642 [05] <idle> 0.215 0.000 256.905
5945681.100684 [04] qemu-system-x86[10647/10642] 0.000 0.028 0.273 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.100703 [04] kworker/4:0[26137] 0.000 0.244 0.018 worker_thread kthread kernel_thread_helper
5945681.100722 [05] qemu-system-x86[10648/10642] 256.922 0.023 0.079 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.145671 [04] <idle> 0.291 0.000 44.968
5945681.145796 [04] qemu-system-x86[10647/10642] 44.986 0.012 0.124 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.166463 [00] <idle> 0.013 0.000 149.898
5945681.166474 [00] watchdog/0[9] 0.000 0.020 0.011 watchdog kthread kernel_thread_helper
5945681.182513 [04] <idle> 0.124 0.000 36.717
5945681.182609 [04] qemu-system-x86[10647/10642] 36.717 0.012 0.095 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.197559 [02] <idle> 0.019 0.000 357.889
5945681.197574 [02] kworker/2:0[24394] 357.889 0.040 0.014 worker_thread kthread kernel_thread_helper
5945681.227502 [11] <idle> 0.013 0.000 187.881
5945681.227517 [11] kworker/11:0[2387] 187.881 0.026 0.014 worker_thread kthread kernel_thread_helper
5945681.240472 [01] <idle> 0.153 0.000 390.560
5945681.240483 [01] watchdog/1[14] 0.000 0.032 0.011 watchdog kthread kernel_thread_helper
5945681.255471 [02] <idle> 0.014 0.000 57.896
5945681.255482 [02] watchdog/2[19] 0.000 0.012 0.010 watchdog kthread kernel_thread_helper
5945681.270451 [03] <idle> 0.012 0.000 360.809
5945681.270463 [03] watchdog/3[24] 0.000 0.030 0.011 watchdog kthread kernel_thread_helper
5945681.277390 [06] <idle> 0.166 0.000 225.261
5945681.277399 [06] kworker/6:2[31603] 404.729 0.045 0.009 worker_thread kthread kernel_thread_helper
5945681.277583 [06] qemu-system-x86[10646/10642] 225.270 0.083 0.184 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.285441 [04] <idle> 0.095 0.000 102.832
5945681.285452 [04] watchdog/4[29] 0.000 0.015 0.010 watchdog kthread kernel_thread_helper
5945681.289473 [11] <idle> 0.014 0.000 61.956
5945681.289488 [11] kworker/11:0[2387] 61.956 0.024 0.014 worker_thread kthread kernel_thread_helper
5945681.301421 [05] <idle> 0.079 0.000 200.699
5945681.301433 [05] watchdog/5[34] 0.000 0.020 0.011 watchdog kthread kernel_thread_helper
5945681.316432 [06] <idle> 0.193 0.000 38.848
5945681.316444 [06] watchdog/6[39] 0.000 0.011 0.011 watchdog kthread kernel_thread_helper
5945681.331400 [07] <idle> 0.190 0.000 481.626
5945681.331411 [07] watchdog/7[44] 0.000 0.037 0.011 watchdog kthread kernel_thread_helper
5945681.334129 [07] <idle> 0.011 0.000 2.717
5945681.334174 [07] qemu-system-x86[26110/26103] 484.354 0.010 0.045 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.334256 [07] <idle> 0.045 0.000 0.082
5945681.334357 [07] qemu-system-x86[26110/26103] 0.082 0.005 0.101 __cond_resched _cond_resched kvm_resched kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl
5945681.334375 [07] kworker/7:0[31118] 0.000 0.044 0.017 worker_thread kthread kernel_thread_helper
5945681.334466 [07] qemu-system-x86[26110/26103] 0.017 0.000 0.091 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.343901 [05] <idle> 0.011 0.000 42.468
5945681.344019 [05] qemu-system-x86[10648/10642] 243.179 0.012 0.118 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.347412 [08] <idle> 0.000 0.000 0.000
5945681.347422 [08] watchdog/8[49] 0.000 0.043 0.010 watchdog kthread kernel_thread_helper
5945681.349075 [01] <idle> 0.011 0.000 108.591
5945681.349119 [01] qemu-system-x86[26111/26103] 499.163 0.016 0.044 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.349205 [01] <idle> 0.044 0.000 0.086
5945681.349347 [01] qemu-system-x86[26111/26103] 0.086 0.005 0.142 __cond_resched _cond_resched kvm_resched kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl
5945681.349360 [03] <idle> 0.011 0.000 78.897
5945681.349361 [01] kworker/1:1[23960] 0.000 0.044 0.013 worker_thread kthread kernel_thread_helper
5945681.349448 [01] qemu-system-x86[26111/26103] 0.013 0.000 0.087 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.349553 [03] qemu-system-x86[26108/26103] 0.000 0.086 0.192 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.353894 [09] <idle> 0.103 0.000 499.597
5945681.354003 [01] <idle> 0.243 0.000 4.554
5945681.354116 [09] qemu-system-x86[10887/10882] 499.597 0.039 0.222 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.354175 [01] qemu-system-x86[10888/10882] 0.000 0.022 0.172 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.363371 [09] <idle> 0.222 0.000 9.254
5945681.363383 [09] watchdog/9[54] 0.000 0.009 0.011 watchdog kthread kernel_thread_helper
5945681.378430 [10] <idle> 0.016 0.000 538.760
5945681.378441 [10] watchdog/10[59] 0.000 0.040 0.010 watchdog kthread kernel_thread_helper
5945681.387738 [00] <idle> 0.011 0.000 221.264
5945681.387795 [00] dnsmasq[1845] 0.000 0.026 0.056 poll_schedule_timeout do_select core_sys_select sys_select system_call_fastpath
5945681.393356 [11] <idle> 0.014 0.000 103.867
5945681.393367 [11] watchdog/11[64] 0.000 0.016 0.011 watchdog kthread kernel_thread_helper
5945681.408382 [12] <idle> 0.000 0.000 0.000
5945681.408393 [12] watchdog/12[69] 0.000 0.020 0.011 watchdog kthread kernel_thread_helper
5945681.413414 [03] <idle> 0.192 0.000 63.860
5945681.413426 [03] kworker/3:1[98] 503.771 0.025 0.012 worker_thread kthread kernel_thread_helper
5945681.419302 [01] <idle> 0.172 0.000 65.126
5945681.419312 [01] kworker/1:1[23960] 69.941 0.034 0.009 worker_thread kthread kernel_thread_helper
5945681.419329 [03] <idle> 0.012 0.000 5.902
5945681.419373 [01] qemu-system-x86[26111/26103] 69.863 0.065 0.060 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.419812 [03] qemu-system-x86[26108/26103] 69.776 0.010 0.483 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.424370 [13] <idle> 0.000 0.000 0.000
5945681.424381 [13] watchdog/13[74] 0.000 0.045 0.011 watchdog kthread kernel_thread_helper
5945681.437452 [15] <idle> 0.014 0.000 379.835
5945681.437511 [15] qemu-system-x86[10885/10882] 0.000 0.032 0.058 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.438350 [15] <idle> 0.058 0.000 0.839
5945681.439062 [15] qemu-system-x86[10885/10882] 0.839 0.008 0.712 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.439313 [15] <idle> 0.712 0.000 0.250
5945681.439328 [14] <idle> 0.000 0.000 0.000
5945681.439339 [14] watchdog/14[79] 0.000 0.047 0.011 watchdog kthread kernel_thread_helper
5945681.439391 [15] qemu-system-x86[10885/10882] 0.250 0.008 0.078 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.440277 [15] <idle> 0.078 0.000 0.886
5945681.440325 [15] qemu-system-x86[10885/10882] 0.886 0.008 0.047 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.441288 [15] <idle> 0.047 0.000 0.962
5945681.441341 [15] qemu-system-x86[10885/10882] 0.962 0.009 0.053 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.442277 [15] <idle> 0.053 0.000 0.935
5945681.442323 [15] qemu-system-x86[10885/10882] 0.935 0.008 0.046 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.443287 [15] <idle> 0.046 0.000 0.964
5945681.443360 [15] qemu-system-x86[10885/10882] 0.964 0.009 0.072 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.454313 [15] <idle> 0.072 0.000 10.953
5945681.454325 [15] watchdog/15[84] 0.000 0.009 0.011 watchdog kthread kernel_thread_helper
5945681.539360 [11] <idle> 0.011 0.000 145.992
5945681.539373 [11] kworker/11:0[2387] 249.871 0.032 0.013 worker_thread kthread kernel_thread_helper
5945681.541346 [01] <idle> 0.070 0.000 121.973
5945681.541360 [01] kworker/1:1[23960] 122.034 0.023 0.013 worker_thread kthread kernel_thread_helper
5945681.548783 [06] <idle> 0.011 0.000 232.339
5945681.548977 [06] qemu-system-x86[10646/10642] 271.200 0.023 0.193 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.549755 [06] <idle> 0.193 0.000 0.778
5945681.549836 [06] qemu-system-x86[10646/10642] 0.778 0.008 0.080 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.550729 [06] <idle> 0.080 0.000 0.893
5945681.550772 [06] qemu-system-x86[10646/10642] 0.893 0.008 0.043 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.551783 [06] <idle> 0.043 0.000 1.011
5945681.551832 [06] qemu-system-x86[10646/10642] 1.011 0.010 0.048 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.551890 [06] <idle> 0.048 0.000 0.058
5945681.551953 [06] qemu-system-x86[10646/10642] 0.058 0.005 0.062 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.552752 [06] <idle> 0.062 0.000 0.799
5945681.552807 [06] qemu-system-x86[10646/10642] 0.799 0.008 0.054 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.553765 [06] <idle> 0.054 0.000 0.958
5945681.553825 [06] qemu-system-x86[10646/10642] 0.958 0.009 0.060 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.577342 [07] <idle> 0.209 0.000 242.875
5945681.577355 [07] kworker/7:0[31118] 242.966 0.035 0.013 worker_thread kthread kernel_thread_helper
5945681.577398 [01] <idle> 0.013 0.000 36.037
5945681.577418 [01] kworker/u:0[26844] 0.000 0.081 0.020 worker_thread kthread kernel_thread_helper
5945681.593314 [01] <idle> 0.020 0.000 15.896
5945681.593329 [01] kworker/1:1[23960] 51.954 0.019 0.014 worker_thread kthread kernel_thread_helper
5945681.593387 [03] <idle> 0.483 0.000 173.574
5945681.593405 [03] kworker/u:0[26844] 15.968 0.084 0.018 worker_thread kthread kernel_thread_helper
5945681.599969 [05] <idle> 0.118 0.000 255.949
5945681.600116 [02] <idle> 0.010 0.000 344.634
5945681.600142 [05] qemu-system-x86[10648/10642] 255.949 0.025 0.172 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.600284 [08] <idle> 0.010 0.000 252.861
5945681.600355 [02] qemu-system-x86[10645/10642] 0.000 0.028 0.238 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.600373 [02] kworker/2:0[24394] 402.781 0.168 0.017 worker_thread kthread kernel_thread_helper
5945681.600844 [08] qemu-system-x86[10642] 0.000 0.031 0.560 poll_schedule_timeout do_sys_poll sys_poll system_call_fastpath [unknown]
5945681.683080 [04] <idle> 0.010 0.000 397.627
5945681.683282 [04] qemu-system-x86[10647/10642] 500.470 0.033 0.202 kvm_vcpu_block kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
5945681.683300 [04] kworker/4:0[26137] 582.579 0.138 0.017 worker_thread kthread kernel_thread_helper
5945681.727334 [12] <idle> 0.011 0.000 318.940
5945681.727349 [12] kworker/12:2[545] 0.000 0.070 0.015 worker_thread kthread kernel_thread_helper
5945681.757251 [11] <idle> 0.013 0.000 217.877
5945681.757267 [11] kworker/11:0[2387] 217.877 0.032 0.016 worker_thread kthread kernel_thread_helper
5945681.789235 [01] <idle> 0.014 0.000 195.905
5945681.789251 [01] kworker/1:1[23960] 195.905 0.032 0.016 worker_thread kthread kernel_thread_helper
5945681.789283 [03] <idle> 0.018 0.000 195.877
5945681.789298 [11] <idle> 0.016 0.000 32.030
5945681.789301 [03] kworker/u:0[26844] 195.877 0.071 0.018 worker_thread kthread kernel_thread_helper
5945681.789316 [11] kworker/11:0[2387] 32.030 0.025 0.018 worker_thread kthread kernel_thread_helper
5945681.805203 [00] <idle> 0.056 0.000 417.407
5945681.805219 [00] kworker/0:0[9363] 788.638 0.051 0.016 worker_thread kthread kernel_thread_helper
5945681.838566 [10] <idle> 0.010 0.000 460.125
5945681.838682 [10] sleep[25910] 999.744 0.035 0.115 io_schedule sleep_on_page __wait_on_bit wait_on_page_bit filemap_fdatawait_range
5945681.838746 [10] kworker/10:1[25017] 999.012 0.017 0.064 worker_thread kthread kernel_thread_helper
5945681.842209 [00] <idle> 0.016 0.000 36.989
5945681.842250 [00] kworker/0:0[9363] 36.989 0.038 0.040 worker_thread kthread kernel_thread_helper
5945681.842304 [10] <idle> 0.180 0.000 3.557
5945681.842347 [10] sleep[25910] 3.622 0.073 0.042 do_exit do_group_exit sys_exit_group system_call_fastpath
5945681.842362 [02] <idle> 0.256 0.000 241.989
5945681.843243 [10] <idle> 0.042 0.000 0.896
5945681.843257 [10] kworker/10:1[25017] 4.496 0.023 0.014 worker_thread kthread kernel_thread_helper
Runtime summary
comm parent sched-in run-time min-run avg-run max-run stddev
(count) (msec) (msec) (msec) (msec) %
---------------------------------------------------------------------------------------------------------
watchdog/0[9] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/1[14] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/2[19] -1 1 0.010 0.010 0.010 0.010 0.00
watchdog/3[24] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/4[29] -1 1 0.010 0.010 0.010 0.010 0.00
watchdog/5[34] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/6[39] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/7[44] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/8[49] -1 1 0.010 0.010 0.010 0.010 0.00
watchdog/9[54] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/10[59] -1 1 0.010 0.010 0.010 0.010 0.00
migration/11[60] -1 1 0.017 0.017 0.017 0.017 0.00
watchdog/11[64] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/12[69] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/13[74] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/14[79] -1 1 0.011 0.011 0.011 0.011 0.00
watchdog/15[84] -1 1 0.011 0.011 0.011 0.011 0.00
kworker/3:1[98] -1 3 0.040 0.012 0.013 0.015 7.74
kworker/15:1[110] -1 1 0.014 0.014 0.014 0.014 0.00
kworker/12:2[545] -1 1 0.015 0.015 0.015 0.015 0.00
irqbalance[1228] -1 1 0.779 0.779 0.779 0.779 0.00
kworker/5:2[1822] -1 1 0.017 0.017 0.017 0.017 0.00
dnsmasq[1845] -1 1 0.056 0.056 0.056 0.056 0.00
sendmail[1939] -1 1 0.098 0.098 0.098 0.098 0.00
kworker/11:0[2387] -1 9 0.165 0.012 0.018 0.047 20.06
kworker/0:0[9363] -1 5 0.098 0.012 0.019 0.040 27.10
qemu-system-x86[10642] -1 1 0.560 0.560 0.560 0.560 0.00
qemu-system-x86[10645/10642] -1 1 0.238 0.238 0.238 0.238 0.00
qemu-system-x86[10646/10642] -1 9 0.894 0.043 0.099 0.193 21.06
qemu-system-x86[10647/10642] -1 4 0.695 0.095 0.173 0.273 23.01
qemu-system-x86[10648/10642] -1 4 0.568 0.079 0.142 0.198 18.74
qemu-system-x86[10885/10882] -1 7 1.068 0.046 0.152 0.712 61.19
qemu-system-x86[10886/10882] -1 1 0.237 0.237 0.237 0.237 0.00
qemu-system-x86[10887/10882] -1 2 0.325 0.103 0.162 0.222 36.53
qemu-system-x86[10888/10882] -1 1 0.172 0.172 0.172 0.172 0.00
kworker/1:1[23960] -1 5 0.067 0.009 0.013 0.016 7.95
kworker/2:0[24394] -1 3 0.051 0.014 0.017 0.019 7.63
kworker/10:1[25017] -1 4 0.109 0.013 0.027 0.064 45.52
perf[25909] -1 1 0.000 0.000 0.000 0.000 0.00
qemu-system-x86[26108/26103] -1 2 0.675 0.192 0.337 0.483 43.09
qemu-system-x86[26110/26103] -1 5 0.488 0.045 0.097 0.190 25.87
qemu-system-x86[26111/26103] -1 5 0.488 0.044 0.097 0.153 22.11
kworker/4:0[26137] -1 2 0.036 0.017 0.018 0.018 2.21
kworker/u:0[26844] -1 3 0.057 0.018 0.019 0.020 2.55
kworker/7:0[31118] -1 2 0.031 0.013 0.015 0.017 12.08
kworker/6:2[31603] -1 2 0.025 0.009 0.012 0.015 25.10
Terminated tasks:
sleep[25910] -1 4 1.000 0.042 0.250 0.750 66.95
Idle stats:
CPU 0 idle for 981.440 msec
CPU 1 idle for 938.732 msec
CPU 2 idle for 1004.093 msec
CPU 3 idle for 933.546 msec
CPU 4 idle for 582.145 msec
CPU 5 idle for 756.022 msec
CPU 6 idle for 680.527 msec
CPU 7 idle for 727.613 msec
CPU 8 idle for 252.861 msec
CPU 9 idle for 508.852 msec
CPU 10 idle for 1004.157 msec
CPU 11 idle for 951.103 msec
CPU 12 idle for 318.940 msec
CPU 13 idle for 0.000 msec
CPU 14 idle for 0.000 msec
CPU 15 idle for 395.627 msec
Total number of unique tasks: 47
Total number of context switches: 202
Total run time (msec): 9.278
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: Is it possible to get (or compute) the consummed CPU with perf ?
2014-11-18 18:08 ` David Ahern
@ 2014-11-26 18:24 ` Jerome Correnoz
2014-11-30 20:37 ` Jerome Correnoz
0 siblings, 1 reply; 6+ messages in thread
From: Jerome Correnoz @ 2014-11-26 18:24 UTC (permalink / raw)
To: linux-perf-users
David Ahern <dsahern <at> gmail.com> writes:
>
> On 11/18/14, 10:31 AM, Jerome Correnoz wrote:
> > Jerome Correnoz <jerome.correnoz <at> st.com> writes:
> >
> >>
> >> Hi,
> >>
> >> We're interested to know the CPU load/usage on our ARMv7 embedded
system
> >> when running some use cases (e.g. simple video decode, double video
> >> decode, etc.). By CPU load, I mean a way to measure the time when the
> >> system was doing something else than Idle.
> >>
> >> I've tried to get it from the performance counter statistics but
> > couldn't
> >> find a way to get it, do I miss something ?
> >>
> >> Also tried to use perf for profiling the system (e.g. perf record -a).
> > It
> >> report very useful percentage for the running processes that we
exploit
> > to
> >> detect hot spots. But It reports X% of the used CPU (nothing related
to
> >> Idle or "rest of CPU").
> >>
> >> So, any way with perf to get this information (directly or indirectly
> > with
> >> few calculation) ?
>
> Not exactly what you want but might be close:
>
> git clone https://github.com/dsahern/linux
> git checkout perf-full-monty
> make -C tools/perf
>
> perf sched record -ag -- sleep 1
> perf sched timehist -S
>
> shows the grains of sand (each sample) and then a runtime summary byt
> task. Example report attached for box just running a few VMs.
>
> David
>
>
> time cpu task name b/n time sch delay run
time
> [tid/pid] (msec) (msec)
(msec)
> --------------- ---- -------------------- --------- --------- -------
--
> 5945680.837926 [11] <idle> 0.000 0.000
0.000
> 5945680.837967 [02] perf[25909] 0.000 0.000
0.000 poll_schedule_timeout do_sys_poll sys_poll
> system_call_fastpath __poll
> 5945680.838017 [11] perf[25910] 0.000 0.011
0.091 __cond_resched _cond_resched wait_for_common
> wait_for_completion stop_one_cpu
> 5945680.838035 [11] migration/11[60] 0.000 0.010
0.017 cpu_stopper_thread kthread kernel_thread_helper
> 5945680.838071 [10] <idle> 0.000 0.000
0.000
> 5945680.838627 [11] <idle> 0.109 0.000
0.591
> 5945680.838675 [11] kworker/11:0[2387] 0.000 0.007
0.047 worker_thread kthread kernel_thread_helper
> 5945680.838822 [10] sleep[25910] 0.053 0.000
0.750 do_nanosleep hrtimer_nanosleep sys_nanosleep
> system_call_fastpath __GI___libc_nanosleep
> 5945680.838836 [10] kworker/10:1[25017] 0.000 0.270
0.013 worker_thread kthread kernel_thread_helper
> 5945680.839650 [02] <idle> 0.000 0.000
1.683
> 5945680.839653 [10] <idle> 0.764 0.000
0.817
> 5945680.839669 [02] kworker/2:0[24394] 0.000 0.008
0.019 worker_thread kthread kernel_thread_helper
> 5945680.839670 [10] kworker/10:1[25017] 0.817 0.012
0.016 worker_thread kthread kernel_thread_helper
> 5945680.839672 [11] <idle> 0.047 0.000
0.997
> 5945680.839684 [11] kworker/11:0[2387] 0.997 0.005
0.012 worker_thread kthread kernel_thread_helper
> 5945680.843522 [05] <idle> 0.000 0.000
0.000
> 5945680.843720 [05] qemu-system-x86[10648/10642] 0.000
0.012 0.198 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.843737 [05] kworker/5:2[1822] 0.000
0.165 0.017 worker_thread kthread kernel_thread_helper
> 5945680.849210 [07] <idle> 0.000
0.000 0.000
> 5945680.849271 [07] qemu-system-x86[26110/26103] 0.000
0.014 0.060 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.849583 [07] <idle> 0.060
0.000 0.312
> 5945680.849662 [11] <idle> 0.012
0.000 9.978
> 5945680.849677 [11] kworker/11:0[2387] 9.978
0.010 0.014 worker_thread kthread kernel_thread_helper
> 5945680.849758 [01] <idle> 0.000
0.000 0.000
> 5945680.849774 [07] qemu-system-x86[26110/26103] 0.312
0.008 0.190 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.849912 [01] qemu-system-x86[26111/26103] 0.000
0.088 0.153 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.853973 [03] <idle> 0.000
0.000 0.000
> 5945680.854193 [09] <idle> 0.000
0.000 0.000
> 5945680.854211 [03] qemu-system-x86[10886/10882] 0.000
0.014 0.237 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.854296 [09] qemu-system-x86[10887/10882] 0.000
0.091 0.103 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945680.860643 [00] <idle> 0.000
0.000 0.000
> 5945680.860655 [00] kworker/0:0[9363] 0.000
0.031 0.012 worker_thread kthread kernel_thread_helper
> 5945680.872267 [06] <idle> 0.000
0.000 0.000
> 5945680.872366 [06] sendmail[1939] 0.000
0.013 0.098 poll_schedule_timeout do_select
> core_sys_select sys_select system_call_fastpath
> 5945680.872645 [06] <idle> 0.098
0.000 0.279
> 5945680.872660 [06] kworker/6:2[31603] 0.000
0.012 0.015 worker_thread kthread kernel_thread_helper
> 5945680.908105 [03] <idle> 0.237
0.000 53.893
> 5945680.908884 [03] irqbalance[1228] 0.000
0.012 0.779 do_nanosleep hrtimer_nanosleep
> sys_nanosleep system_call_fastpath [unknown]
> 5945680.908900 [03] kworker/3:1[98] 0.000
0.365 0.015 worker_thread kthread kernel_thread_helper
> 5945680.909630 [03] <idle> 0.794
0.000 0.730
> 5945680.909642 [03] kworker/3:1[98] 0.730
0.007 0.012 worker_thread kthread kernel_thread_helper
> 5945680.999567 [00] <idle> 0.012
0.000 138.911
> 5945680.999581 [00] kworker/0:0[9363] 138.911
0.023 0.014 worker_thread kthread kernel_thread_helper
> 5945681.016550 [00] <idle> 0.014
0.000 16.969
> 5945681.016564 [00] kworker/0:0[9363] 16.969
0.013 0.013 worker_thread kthread kernel_thread_helper
> 5945681.039607 [11] <idle> 0.014
0.000 189.929
> 5945681.039620 [11] kworker/11:0[2387] 189.929
0.036 0.013 worker_thread kthread kernel_thread_helper
> 5945681.051961 [06] <idle> 0.015
0.000 179.300
> 5945681.052128 [06] qemu-system-x86[10646/10642] 0.000
0.020 0.166 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.057602 [15] <idle> 0.000
0.000 0.000
> 5945681.057617 [15] kworker/15:1[110] 0.000
0.041 0.014 worker_thread kthread kernel_thread_helper
> 5945681.100411 [04] <idle> 0.000
0.000 0.000
> 5945681.100642 [05] <idle> 0.215
0.000 256.905
> 5945681.100684 [04] qemu-system-x86[10647/10642] 0.000
0.028 0.273 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.100703 [04] kworker/4:0[26137] 0.000
0.244 0.018 worker_thread kthread kernel_thread_helper
> 5945681.100722 [05] qemu-system-x86[10648/10642] 256.922
0.023 0.079 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.145671 [04] <idle> 0.291
0.000 44.968
> 5945681.145796 [04] qemu-system-x86[10647/10642] 44.986
0.012 0.124 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.166463 [00] <idle> 0.013
0.000 149.898
> 5945681.166474 [00] watchdog/0[9] 0.000
0.020 0.011 watchdog kthread kernel_thread_helper
> 5945681.182513 [04] <idle> 0.124
0.000 36.717
> 5945681.182609 [04] qemu-system-x86[10647/10642] 36.717
0.012 0.095 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.197559 [02] <idle> 0.019
0.000 357.889
> 5945681.197574 [02] kworker/2:0[24394] 357.889
0.040 0.014 worker_thread kthread kernel_thread_helper
> 5945681.227502 [11] <idle> 0.013
0.000 187.881
> 5945681.227517 [11] kworker/11:0[2387] 187.881
0.026 0.014 worker_thread kthread kernel_thread_helper
> 5945681.240472 [01] <idle> 0.153
0.000 390.560
> 5945681.240483 [01] watchdog/1[14] 0.000
0.032 0.011 watchdog kthread kernel_thread_helper
> 5945681.255471 [02] <idle> 0.014
0.000 57.896
> 5945681.255482 [02] watchdog/2[19] 0.000
0.012 0.010 watchdog kthread kernel_thread_helper
> 5945681.270451 [03] <idle> 0.012
0.000 360.809
> 5945681.270463 [03] watchdog/3[24] 0.000
0.030 0.011 watchdog kthread kernel_thread_helper
> 5945681.277390 [06] <idle> 0.166
0.000 225.261
> 5945681.277399 [06] kworker/6:2[31603] 404.729
0.045 0.009 worker_thread kthread kernel_thread_helper
> 5945681.277583 [06] qemu-system-x86[10646/10642] 225.270
0.083 0.184 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.285441 [04] <idle> 0.095
0.000 102.832
> 5945681.285452 [04] watchdog/4[29] 0.000
0.015 0.010 watchdog kthread kernel_thread_helper
> 5945681.289473 [11] <idle> 0.014
0.000 61.956
> 5945681.289488 [11] kworker/11:0[2387] 61.956
0.024 0.014 worker_thread kthread kernel_thread_helper
> 5945681.301421 [05] <idle> 0.079
0.000 200.699
> 5945681.301433 [05] watchdog/5[34] 0.000
0.020 0.011 watchdog kthread kernel_thread_helper
> 5945681.316432 [06] <idle> 0.193
0.000 38.848
> 5945681.316444 [06] watchdog/6[39] 0.000
0.011 0.011 watchdog kthread kernel_thread_helper
> 5945681.331400 [07] <idle> 0.190
0.000 481.626
> 5945681.331411 [07] watchdog/7[44] 0.000
0.037 0.011 watchdog kthread kernel_thread_helper
> 5945681.334129 [07] <idle> 0.011
0.000 2.717
> 5945681.334174 [07] qemu-system-x86[26110/26103] 484.354
0.010 0.045 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.334256 [07] <idle> 0.045
0.000 0.082
> 5945681.334357 [07] qemu-system-x86[26110/26103] 0.082
0.005 0.101 __cond_resched _cond_resched
> kvm_resched kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl
> 5945681.334375 [07] kworker/7:0[31118] 0.000
0.044 0.017 worker_thread kthread kernel_thread_helper
> 5945681.334466 [07] qemu-system-x86[26110/26103] 0.017
0.000 0.091 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.343901 [05] <idle> 0.011
0.000 42.468
> 5945681.344019 [05] qemu-system-x86[10648/10642] 243.179
0.012 0.118 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.347412 [08] <idle> 0.000
0.000 0.000
> 5945681.347422 [08] watchdog/8[49] 0.000
0.043 0.010 watchdog kthread kernel_thread_helper
> 5945681.349075 [01] <idle> 0.011
0.000 108.591
> 5945681.349119 [01] qemu-system-x86[26111/26103] 499.163
0.016 0.044 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.349205 [01] <idle> 0.044
0.000 0.086
> 5945681.349347 [01] qemu-system-x86[26111/26103] 0.086
0.005 0.142 __cond_resched _cond_resched
> kvm_resched kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl
> 5945681.349360 [03] <idle> 0.011
0.000 78.897
> 5945681.349361 [01] kworker/1:1[23960] 0.000
0.044 0.013 worker_thread kthread kernel_thread_helper
> 5945681.349448 [01] qemu-system-x86[26111/26103] 0.013
0.000 0.087 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.349553 [03] qemu-system-x86[26108/26103] 0.000
0.086 0.192 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.353894 [09] <idle> 0.103
0.000 499.597
> 5945681.354003 [01] <idle> 0.243
0.000 4.554
> 5945681.354116 [09] qemu-system-x86[10887/10882] 499.597
0.039 0.222 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.354175 [01] qemu-system-x86[10888/10882] 0.000
0.022 0.172 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.363371 [09] <idle> 0.222
0.000 9.254
> 5945681.363383 [09] watchdog/9[54] 0.000
0.009 0.011 watchdog kthread kernel_thread_helper
> 5945681.378430 [10] <idle> 0.016
0.000 538.760
> 5945681.378441 [10] watchdog/10[59] 0.000
0.040 0.010 watchdog kthread kernel_thread_helper
> 5945681.387738 [00] <idle> 0.011
0.000 221.264
> 5945681.387795 [00] dnsmasq[1845] 0.000
0.026 0.056 poll_schedule_timeout do_select
> core_sys_select sys_select system_call_fastpath
> 5945681.393356 [11] <idle> 0.014
0.000 103.867
> 5945681.393367 [11] watchdog/11[64] 0.000
0.016 0.011 watchdog kthread kernel_thread_helper
> 5945681.408382 [12] <idle> 0.000
0.000 0.000
> 5945681.408393 [12] watchdog/12[69] 0.000
0.020 0.011 watchdog kthread kernel_thread_helper
> 5945681.413414 [03] <idle> 0.192
0.000 63.860
> 5945681.413426 [03] kworker/3:1[98] 503.771
0.025 0.012 worker_thread kthread kernel_thread_helper
> 5945681.419302 [01] <idle> 0.172
0.000 65.126
> 5945681.419312 [01] kworker/1:1[23960] 69.941
0.034 0.009 worker_thread kthread kernel_thread_helper
> 5945681.419329 [03] <idle> 0.012
0.000 5.902
> 5945681.419373 [01] qemu-system-x86[26111/26103] 69.863
0.065 0.060 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.419812 [03] qemu-system-x86[26108/26103] 69.776
0.010 0.483 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.424370 [13] <idle> 0.000
0.000 0.000
> 5945681.424381 [13] watchdog/13[74] 0.000
0.045 0.011 watchdog kthread kernel_thread_helper
> 5945681.437452 [15] <idle> 0.014
0.000 379.835
> 5945681.437511 [15] qemu-system-x86[10885/10882] 0.000
0.032 0.058 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.438350 [15] <idle> 0.058
0.000 0.839
> 5945681.439062 [15] qemu-system-x86[10885/10882] 0.839
0.008 0.712 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.439313 [15] <idle> 0.712
0.000 0.250
> 5945681.439328 [14] <idle> 0.000
0.000 0.000
> 5945681.439339 [14] watchdog/14[79] 0.000
0.047 0.011 watchdog kthread kernel_thread_helper
> 5945681.439391 [15] qemu-system-x86[10885/10882] 0.250
0.008 0.078 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.440277 [15] <idle> 0.078
0.000 0.886
> 5945681.440325 [15] qemu-system-x86[10885/10882] 0.886
0.008 0.047 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.441288 [15] <idle> 0.047
0.000 0.962
> 5945681.441341 [15] qemu-system-x86[10885/10882] 0.962
0.009 0.053 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.442277 [15] <idle> 0.053
0.000 0.935
> 5945681.442323 [15] qemu-system-x86[10885/10882] 0.935
0.008 0.046 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.443287 [15] <idle> 0.046
0.000 0.964
> 5945681.443360 [15] qemu-system-x86[10885/10882] 0.964
0.009 0.072 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.454313 [15] <idle> 0.072
0.000 10.953
> 5945681.454325 [15] watchdog/15[84] 0.000
0.009 0.011 watchdog kthread kernel_thread_helper
> 5945681.539360 [11] <idle> 0.011
0.000 145.992
> 5945681.539373 [11] kworker/11:0[2387] 249.871
0.032 0.013 worker_thread kthread kernel_thread_helper
> 5945681.541346 [01] <idle> 0.070
0.000 121.973
> 5945681.541360 [01] kworker/1:1[23960] 122.034
0.023 0.013 worker_thread kthread kernel_thread_helper
> 5945681.548783 [06] <idle> 0.011
0.000 232.339
> 5945681.548977 [06] qemu-system-x86[10646/10642] 271.200
0.023 0.193 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.549755 [06] <idle> 0.193
0.000 0.778
> 5945681.549836 [06] qemu-system-x86[10646/10642] 0.778
0.008 0.080 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.550729 [06] <idle> 0.080
0.000 0.893
> 5945681.550772 [06] qemu-system-x86[10646/10642] 0.893
0.008 0.043 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.551783 [06] <idle> 0.043
0.000 1.011
> 5945681.551832 [06] qemu-system-x86[10646/10642] 1.011
0.010 0.048 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.551890 [06] <idle> 0.048
0.000 0.058
> 5945681.551953 [06] qemu-system-x86[10646/10642] 0.058
0.005 0.062 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.552752 [06] <idle> 0.062
0.000 0.799
> 5945681.552807 [06] qemu-system-x86[10646/10642] 0.799
0.008 0.054 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.553765 [06] <idle> 0.054
0.000 0.958
> 5945681.553825 [06] qemu-system-x86[10646/10642] 0.958
0.009 0.060 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.577342 [07] <idle> 0.209
0.000 242.875
> 5945681.577355 [07] kworker/7:0[31118] 242.966
0.035 0.013 worker_thread kthread kernel_thread_helper
> 5945681.577398 [01] <idle> 0.013
0.000 36.037
> 5945681.577418 [01] kworker/u:0[26844] 0.000
0.081 0.020 worker_thread kthread kernel_thread_helper
> 5945681.593314 [01] <idle> 0.020
0.000 15.896
> 5945681.593329 [01] kworker/1:1[23960] 51.954
0.019 0.014 worker_thread kthread kernel_thread_helper
> 5945681.593387 [03] <idle> 0.483
0.000 173.574
> 5945681.593405 [03] kworker/u:0[26844] 15.968
0.084 0.018 worker_thread kthread kernel_thread_helper
> 5945681.599969 [05] <idle> 0.118
0.000 255.949
> 5945681.600116 [02] <idle> 0.010
0.000 344.634
> 5945681.600142 [05] qemu-system-x86[10648/10642] 255.949
0.025 0.172 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.600284 [08] <idle> 0.010
0.000 252.861
> 5945681.600355 [02] qemu-system-x86[10645/10642] 0.000
0.028 0.238 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.600373 [02] kworker/2:0[24394] 402.781
0.168 0.017 worker_thread kthread kernel_thread_helper
> 5945681.600844 [08] qemu-system-x86[10642] 0.000
0.031 0.560 poll_schedule_timeout do_sys_poll
> sys_poll system_call_fastpath [unknown]
> 5945681.683080 [04] <idle> 0.010
0.000 397.627
> 5945681.683282 [04] qemu-system-x86[10647/10642] 500.470
0.033 0.202 kvm_vcpu_block
> kvm_arch_vcpu_ioctl_run kvm_vcpu_ioctl do_vfs_ioctl sys_ioctl
> 5945681.683300 [04] kworker/4:0[26137] 582.579
0.138 0.017 worker_thread kthread kernel_thread_helper
> 5945681.727334 [12] <idle> 0.011
0.000 318.940
> 5945681.727349 [12] kworker/12:2[545] 0.000
0.070 0.015 worker_thread kthread kernel_thread_helper
> 5945681.757251 [11] <idle> 0.013
0.000 217.877
> 5945681.757267 [11] kworker/11:0[2387] 217.877
0.032 0.016 worker_thread kthread kernel_thread_helper
> 5945681.789235 [01] <idle> 0.014
0.000 195.905
> 5945681.789251 [01] kworker/1:1[23960] 195.905
0.032 0.016 worker_thread kthread kernel_thread_helper
> 5945681.789283 [03] <idle> 0.018
0.000 195.877
> 5945681.789298 [11] <idle> 0.016
0.000 32.030
> 5945681.789301 [03] kworker/u:0[26844] 195.877
0.071 0.018 worker_thread kthread kernel_thread_helper
> 5945681.789316 [11] kworker/11:0[2387] 32.030
0.025 0.018 worker_thread kthread kernel_thread_helper
> 5945681.805203 [00] <idle> 0.056
0.000 417.407
> 5945681.805219 [00] kworker/0:0[9363] 788.638
0.051 0.016 worker_thread kthread kernel_thread_helper
> 5945681.838566 [10] <idle> 0.010
0.000 460.125
> 5945681.838682 [10] sleep[25910] 999.744
0.035 0.115 io_schedule sleep_on_page __wait_on_bit
> wait_on_page_bit filemap_fdatawait_range
> 5945681.838746 [10] kworker/10:1[25017] 999.012
0.017 0.064 worker_thread kthread kernel_thread_helper
> 5945681.842209 [00] <idle> 0.016
0.000 36.989
> 5945681.842250 [00] kworker/0:0[9363] 36.989
0.038 0.040 worker_thread kthread kernel_thread_helper
> 5945681.842304 [10] <idle> 0.180
0.000 3.557
> 5945681.842347 [10] sleep[25910] 3.622
0.073 0.042 do_exit do_group_exit sys_exit_group
system_call_fastpath
> 5945681.842362 [02] <idle> 0.256
0.000 241.989
> 5945681.843243 [10] <idle> 0.042
0.000 0.896
> 5945681.843257 [10] kworker/10:1[25017] 4.496
0.023 0.014 worker_thread kthread kernel_thread_helper
>
> Runtime summary
> comm parent sched-in run-time min-
run avg-run max-run stddev
> (count) (msec)
(msec) (msec) (msec) %
> -------------------------------------------------------------------------
--------------------------------
> watchdog/0[9] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/1[14] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/2[19] -1 1 0.010
0.010 0.010 0.010 0.00
> watchdog/3[24] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/4[29] -1 1 0.010
0.010 0.010 0.010 0.00
> watchdog/5[34] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/6[39] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/7[44] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/8[49] -1 1 0.010
0.010 0.010 0.010 0.00
> watchdog/9[54] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/10[59] -1 1 0.010
0.010 0.010 0.010 0.00
> migration/11[60] -1 1 0.017
0.017 0.017 0.017 0.00
> watchdog/11[64] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/12[69] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/13[74] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/14[79] -1 1 0.011
0.011 0.011 0.011 0.00
> watchdog/15[84] -1 1 0.011
0.011 0.011 0.011 0.00
> kworker/3:1[98] -1 3 0.040
0.012 0.013 0.015 7.74
> kworker/15:1[110] -1 1 0.014
0.014 0.014 0.014 0.00
> kworker/12:2[545] -1 1 0.015
0.015 0.015 0.015 0.00
> irqbalance[1228] -1 1 0.779
0.779 0.779 0.779 0.00
> kworker/5:2[1822] -1 1 0.017
0.017 0.017 0.017 0.00
> dnsmasq[1845] -1 1 0.056
0.056 0.056 0.056 0.00
> sendmail[1939] -1 1 0.098
0.098 0.098 0.098 0.00
> kworker/11:0[2387] -1 9 0.165
0.012 0.018 0.047 20.06
> kworker/0:0[9363] -1 5 0.098
0.012 0.019 0.040 27.10
> qemu-system-x86[10642] -1 1 0.560
0.560 0.560 0.560 0.00
> qemu-system-x86[10645/10642] -1 1 0.238
0.238 0.238 0.238 0.00
> qemu-system-x86[10646/10642] -1 9 0.894
0.043 0.099 0.193 21.06
> qemu-system-x86[10647/10642] -1 4 0.695
0.095 0.173 0.273 23.01
> qemu-system-x86[10648/10642] -1 4 0.568
0.079 0.142 0.198 18.74
> qemu-system-x86[10885/10882] -1 7 1.068
0.046 0.152 0.712 61.19
> qemu-system-x86[10886/10882] -1 1 0.237
0.237 0.237 0.237 0.00
> qemu-system-x86[10887/10882] -1 2 0.325
0.103 0.162 0.222 36.53
> qemu-system-x86[10888/10882] -1 1 0.172
0.172 0.172 0.172 0.00
> kworker/1:1[23960] -1 5 0.067
0.009 0.013 0.016 7.95
> kworker/2:0[24394] -1 3 0.051
0.014 0.017 0.019 7.63
> kworker/10:1[25017] -1 4 0.109
0.013 0.027 0.064 45.52
> perf[25909] -1 1 0.000
0.000 0.000 0.000 0.00
> qemu-system-x86[26108/26103] -1 2 0.675
0.192 0.337 0.483 43.09
> qemu-system-x86[26110/26103] -1 5 0.488
0.045 0.097 0.190 25.87
> qemu-system-x86[26111/26103] -1 5 0.488
0.044 0.097 0.153 22.11
> kworker/4:0[26137] -1 2 0.036
0.017 0.018 0.018 2.21
> kworker/u:0[26844] -1 3 0.057
0.018 0.019 0.020 2.55
> kworker/7:0[31118] -1 2 0.031
0.013 0.015 0.017 12.08
> kworker/6:2[31603] -1 2 0.025
0.009 0.012 0.015 25.10
>
> Terminated tasks:
> sleep[25910] -1 4 1.000
0.042 0.250 0.750 66.95
>
> Idle stats:
> CPU 0 idle for 981.440 msec
> CPU 1 idle for 938.732 msec
> CPU 2 idle for 1004.093 msec
> CPU 3 idle for 933.546 msec
> CPU 4 idle for 582.145 msec
> CPU 5 idle for 756.022 msec
> CPU 6 idle for 680.527 msec
> CPU 7 idle for 727.613 msec
> CPU 8 idle for 252.861 msec
> CPU 9 idle for 508.852 msec
> CPU 10 idle for 1004.157 msec
> CPU 11 idle for 951.103 msec
> CPU 12 idle for 318.940 msec
> CPU 13 idle for 0.000 msec
> CPU 14 idle for 0.000 msec
> CPU 15 idle for 395.627 msec
>
> Total number of unique tasks: 47
> Total number of context switches: 202
> Total run time (msec): 9.278
>
All,
We've finnaly been able to find a way to get the consummed CPU with perf
on ARMv7.
By default, 'perf record' uses cpu-cycles HW event as counter. On ARMv7,
when entering idle state (wfi), the CPU clock are gated and the CPU cycles
should not increase which could explain the previous figures we had.
(e.g. 6.25% swapper [kernel.kallsyms] [k])
The solution we found consists in using 'task-clock' or 'cpu-clock' as
counter (perf record -e task-clock -a sleep xxx).
With it, the percentage for swapper takes into account the idle state.
(e.g. 89.15% swapper [kernel.kallsyms] [k])
Using the swapper percentage, we have a good approximation of CPU load.
CPU load = 100% - (%swapper)
which is around 11% for the above use case example and it is conform to
other CPU load measures done with other tools.
Jerome
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is it possible to get (or compute) the consummed CPU with perf ?
2014-11-26 18:24 ` Jerome Correnoz
@ 2014-11-30 20:37 ` Jerome Correnoz
0 siblings, 0 replies; 6+ messages in thread
From: Jerome Correnoz @ 2014-11-30 20:37 UTC (permalink / raw)
To: linux-perf-users
Hi,
It seems possible to compute the CPU load by exploiting the 'perf stat'
results, in particular the GHz reported with "cycles" when using 'perf stat
-a sleep x'
For our use case example, it reports "CPU cycles 0.132 GHZ".
Knowing that the cpu frequency is 1.2 GHz (from
/sys/devices/system/cpu/cpu[01]/cpufreq/cpuinfo_cur_freq)
We can deduce the CPU load: 0.132/1.2*100=11%
In our system, we've checked with different use cases for which we know the
expected values and using the above method allows to get very accurate values.
Can someone confirm that this method is reliable and a good way to get
accurate CPU load figures ?
Regards,
Jerome
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-11-30 20:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-11-11 8:03 Is it possible to get (or compute) the consummed CPU with perf ? Jerome Correnoz
2014-11-18 17:31 ` Jerome Correnoz
2014-11-18 17:51 ` Milian Wolff
2014-11-18 18:08 ` David Ahern
2014-11-26 18:24 ` Jerome Correnoz
2014-11-30 20:37 ` Jerome Correnoz
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