ok now. the reason is the powertop depends on
CONFIG_EVENT_POWER_TRACING_DEPRECATED, after selecting it, powertop
gets to work on SiRFprimaII.
Thanks
barry
2011/12/14 Barry Song <21cn...@gmail.com>:
> Hi Amit,
>
> Thanks!
>
> 2011/12/12 Amit Kachhap <amit.kach...@linaro.org>:
>> Hi Barry,
>>
>> You fix for invalid cpu id looks fine.
>
> so will you merge some fixes into linaro tree?
>
>> As for the P states this new
>> powertop combines with the cpuidle numbers. so if the system is highly
>> idle it means processor is idle and hence P states is shown as 0.
>
> i did have a highly idle in my last test as you can see from attached
> picture. my C state "WFI" holds 98%.
>
> but i wrote a program:
> main()
> {
> while(1);
> }
> and run it, then it makes C state to 0%.
>
> but i still got all p state with 0%.
>
> anything have i missed?
>
>>
>> Thanks,
>> Amit Daniel
>>
>>
>> On 12 December 2011 15:55, Barry Song <21cn...@gmail.com> wrote:
>>> Hi Tony/Amit,
>>> anybody has tried to use powertop from linaro on a single core ARM
>>> SoC? What i am using is
>>> git://android.git.linaro.org/platform/external/powertop.git.
>>> I got two questions:
>>> 1. powertop will crash in handle_one_cpu() due to it gets wrong cpu
>>> number(-1), then i made the following change to make it work:
>>>
>>> powertop: fix segment fault for single cpu env
>>>
>>> Signed-off-by: Barry Song <baohua.s...@csr.com>
>>>
>>> diff --git a/cpu/cpu.cpp b/cpu/cpu.cpp
>>> index 29fc72c..c56c746 100644
>>> --- a/cpu/cpu.cpp
>>> +++ b/cpu/cpu.cpp
>>> @@ -302,6 +302,9 @@ void enumerate_cpus(void)
>>> model = strtoull(c, NULL, 10);
>>> }
>>> }
>>> +
>>> + if (number == -1)
>>> + number = 0;
>>> if (strncasecmp(line, "bogomips\t", 9) == 0) {
>>> handle_one_cpu(number, vendor, family, model);
>>> set_max_cpu(number);
>>>
>>> 2. after fixing problem1, powertop can run on PrimaII, but i always
>>> get 0.0% for every p states as you can see from attached pic.
>>> but if we check cpufreq stats in
>>> /sys/devices/system/cpu/cpu0/cpufreq/stats, my system does change freq
>>> based on ondemand.
>>>
>>> # cat time_in_state
>>> 800000 2064
>>> 600000 181
>>> 400000 341
>>> 200000 60381
>>>
>>> # cat trans_table
>>> From : To
>>> : 800000 600000 400000 200000
>>> 800000: 0 13 13 14
>>> 600000: 5 0 3 5
>>> 400000: 5 0 0 11
>>> 200000: 29 0 0 0
>>>
>>> # cat total_trans
>>> 98
>>>
>>> does anyone have experiences about it?
>>>
>>> Thanks
>>> barry
>
> Thanks
> barry
<<attachment: sirf-powertop.PNG>>
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