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Display power for i7 cpus #95

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
In hwmonitor there is a sensor which shows how much power is used by the core 
i, especially the core i7. it would be nice if you could integrate it in the 
next version of ohm. 

what do you think about a display for laptop batteries? hwmonitor shows that...

Original issue reported on code.google.com by tobias.h...@googlemail.com on 19 Jul 2010 at 6:46

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GoogleCodeExporter commented 9 years ago 
Battery monitoring is valid and listed already in Issue 4.

I am not really sure where the hwmonitor has the "power sensor" data from. My 
guess is, it uses a reading of the average performance-state (P-state) or just 
the (average) multiplier and interpolates over a power consumption table with 
reference values for each p-state or multiplier. But this would yield more of a 
theoretical power consumption value, than an actual measurement.

Some mainboards have actual current and voltage monitoring chips in the voltage 
regulator circuits, and from these the power consumption could be calculated as 
well. But hwmonitor shows these seperately (and often with completely different 
values).

The hwmonitor power value is only useful, if you can not find two different CPU 
stress tools which produce the same power value in hwmonitor but different 
steady state core temperatures. Maybe you can try LinX and some other less 
agressiv stress tool (which loads only one core) and see if you can get the 
same power value, but obviously different core temperatures. Perhaps you need 
to disable turbo mode for this.

Original comment by moel.mich on 19 Jul 2010 at 7:58

GoogleCodeExporter commented 9 years ago

Original comment by moel.mich on 3 Oct 2010 at 5:45