[CentOS] Power burn test

Robert Moskowitz rgm at htt-consult.com
Fri Aug 3 20:29:00 UTC 2007


Timothy Selivanow wrote:
> On Fri, 2007-08-03 at 15:01 -0400, Robert Moskowitz wrote:
>   
>> I need a program that will just run everything at max so I can measure 
>> the max power used on some systems.  My 'Kill a Watt' meter should show 
>> up early next week.
>>
>> SO run that CPU at max, using all memory, and keeping the harddrive 
>> spinning.
>>
>> I can jsut do pings on the lan card for it to stay awake.
>>
>> I have searched here and on the net and have come back with nothing.
>>
>>
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>>     
>
> Are you wanting max power for provisioning purposes?  If so, the max
> power on the power supply or chassis will give you absolute max.  80% of
> that number is what it is rated for on a continuous basis, 100% is for
> max burst.
>   
No for UPS purposes.  Actually some of these are 'portable' and I want 
to size an external battery.

I will be running a number of tests.  Max, min, 'typical'.
> If you need a more accurate number (as the above is the rated Wattage,
> which /will/ be different than actual usage for safety purposes), you
> could run multiple of something like this: `dd if=/dev/urandom
> of={somefile} bs=1024k count=1024`.  Depending on your processor speed,
> that won't keep the disks busy all the time which is why I suggested
> multiple running at the same time.  What that will do is pull 1GB worth
> of random data (stresses CPU) and writes it as fast as possible to the
> disk. Running a few of those in a loop should give you enough time to
> see actual power draw.  Shifting bits around in the memory register
> probably won't add too much power draw, as it is mostly CPU and chipset
> (just CPU if you are using AMD).  The RAM stick is fully powered
> regardless.
>
> Hope that helps at least a little.



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