On 10/8/2010 12:58 AM, Paul van der Vlis wrote:
Auke Kok wrote:
On 10/03/10 10:44, Paul van der Vlis wrote:
Hello,
I am looking for a list with the idle power consumption of CPU's.
There are many lists with the TDP, but that's something different. I
have no problems with power-consumption when the machine is really busy,
but I hate it when there is a big consumption when there is nothing to do.
This is a bit harder to generate than TDP etc. Do you want the power
consumption of your CPU *package*? Or just one core? Or even a thread?
Or do you want wall-equivalent power? What's Idle? Accounting for C4/5/6
deep C-states?
etc...
(I did not get this message by mail, but I saw it in the archive.)
What I do now is to measure the powerconsumption of a CPU inclusive
mainbord, power-supply, memory and disk.
I realise that it would be better if I would have the consumption of the
CPU package alone. But I would need also information then about the
mainboard.
With "idle" I mean a state without workload, but where everything is
functional.
I understand it is not easy to find a good way, but I think you also
understand it is important to have this kind of information.
Maybe it would be good to measure a "reaction time" in the idle state
too. E.g. of a webserver.
that information is actually relatively easy to retrieve since every
C-state has a specific "exit latency" which is known (the scheduler uses
this to decide which C-state to enter for instance). So, C-state
statistics can be used to calculate average return-from-idle latency
trivially...
Auke
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