Sebastien Roy wrote:
On Sat, 2009-09-05 at 16:31 +0800, Aubrey Li wrote:
On Sat, Sep 5, 2009 at 10:59 AM, Sebastien Roy<[email protected]> wrote:
On Sat, 2009-09-05 at 10:38 +0800, Aubrey Li wrote:
I wonder what changed.
to put this simply, the default mode is event driving, which makes the p-state
transition decision by several sampling points. It's more aggressive.
"poll-mode" makes the transition decision by a tunable sampling period. The
period is 1s on your system (cpu-threshold 1s). It's more stable.
Hmm, is it then possible that when event driven mode is used, powertop
simply can't observe the lower p-states because of its probe effect?
Shouldn't be the case. Powertop is using dtrace probes that are firing
with each P-state transition.
and if the suspend failures are related.
It looks like the system will only suspend if it's at the lowest P-state...
I'm not suspend/resume expert, you can post this question on pm-discuss
mailing list.
I will, thanks for the info.
The system is only supposed to suspend if all power manageable devices
are at their lowest power level. So, it does make sense that the system
would only suspend if the system is at it's lowest P-state.
Mark
-Seb
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