On Feb 20, 2008, at 12:18 AM, Aubrey Li wrote:
> On Jan 29, 2008 10:34 PM, Pat Bredenberg
> <Patrick.Bredenberg at sun.com> wrote:
>> Hi folks,
>>
>> Are the -d and -t options for powertop mutually exclusive?
>> If so,
>> powertop should spew a usage message and exit with non-zero status.
>> If not, then something is wrong. I used two different time
>> intervals (3 and 10 seconds) and powertop produced no causes for
>> wakeups if -d was also supplied:
>>
>> The output produced was:
>>
>> # ./powertop -time=10 -d
>> Solaris PowerTOP 1.0 (C) 2007 Intel Corporation
>>
>> Collecting data for 0 seconds
>> Cn Avg residency
>> C0 (cpu running) (-698443.3%)
>> C1 3.1ms (698543.3%)
>>
>> P-states (frequencies)
>> 2393 Mhz 100.0%
>> Wakeups-from-idle per second: 2274327.2 interval: 0.0s
>> Top causes for wakeups:
>> # echo $?
>> 0
>>
>> Clearly something isn't right since it collects data for
>> "0" seconds
>> and the residency fields are unreasonable. I couldn't find an
>> outright man page for powertop on lesswatts.org or opensolaris.org
>> and didn't see anything other powertop-related documentation on the
>> web that could provide further insight. This was on a clovertown
>> system running snv_81 (the source for the powertop built was
>> downloaded this morning) with the following socket info:
>>
>> # psrinfo -vp
>> The physical processor has 4 virtual processors (0 1 4 5)
>> x86 (GenuineIntel 6F4 family 6 model 15 step 4 clock 2400 MHz)
>> Intel(r) CPU @ 2.40GHz
>> The physical processor has 4 virtual processors (2 3 6 7)
>> x86 (GenuineIntel 6F4 family 6 model 15 step 4 clock 2400 MHz)
>> Intel(r) CPU @ 2.40GHz
>>
>> Kindly let me know if this is a user-error kind of thing
>> or if
>> something can be done to make powertop better.
>>
>
> a user-error, ;-)
>
> #./powertop -h
> Usage: powertop [OPTION...]
> -d, --dump read wakeups once and print list of
> top offenders
> -t, --time=DOUBLE default time to gather data in seconds
> -h, --help Show this help message
>
> you missed one "minus", it should be:
> #./powertop --time=10 -d
> or
> #./powertop -t 10 -d
Ah, my mistake. I'll call this my first mulligan in powertop usage
and testing. Thanks for pointing out my little faux pas. I'll take a
second crack at it with the correct usage. :)
Thanks Aubrey,
Pat
>
> Thanks,
> -Aubrey
