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Post subject: CPU utilization & KPowersave
 Posted: Oct 06, 2008 - 03:21 PM
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Joined: May 28, 2007
Posts: 537
Status: Offline
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I have a two core processor but in kpawersave information dialog the frequencies of Processor 1 & 2 are always the same.
I think in single threatted application CPU 1 should be max and CPU 2 low.
Is that a bug of Kpowersave or what?
Thank you
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Post subject: RE: CPU utilization & KPowersave
Posted: Oct 06, 2008 - 03:46 PM
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Joined: Nov 25, 2006
Posts: 2555
Status: Offline
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| Only very current CPU series allow frequency scaling the cores individually, older models can only set one common frequency for all cores. |
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Post subject:
Posted: Oct 06, 2008 - 05:59 PM
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Joined: May 28, 2007
Posts: 537
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Thank you slh
It is a quite new CPU (AMD ATHLON 64 X2 4850E). |
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Post subject:
Posted: Oct 06, 2008 - 08:42 PM
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Joined: May 02, 2008
Posts: 124
Status: Offline
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I have the same cpu. Conky displays different frequencies for the two cores almost constantly. The limitation may be with kpowersave.
Perhaps kpowersave reports the current, scaled max frequency (which seems to be the same for both cores), rather than actual frequency per core? |
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Post subject:
Posted: Oct 07, 2008 - 10:28 AM
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Joined: Dec 04, 2006
Posts: 549
Status: Offline
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i think i should add, that AFAIK athlon64 - labeled processors still are K8-Cores, which are far from being new.
The newer K10-Cores (Phenom) got some advanced power-saving features. The dual-Core version of those (codename Kuma) seems to be eitehr cancelled or at least delayed until the 45nm process is ready...
Although i believe that even K8s must be able to clock the cores differently, but new processor != new core.
my few cent..
greetings,
me |
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Post subject:
Posted: Oct 07, 2008 - 12:26 PM
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Joined: May 28, 2007
Posts: 537
Status: Offline
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Thank you all for your answers and sorry for the late reply (I had an accident).
dsmithhfx should be right. When KPowersave shows max frequency in both cpu's I can open & run matlab at very reasonable speed which means one cpu was not at max frequency. |
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