Re: C states on AMD SMP

Erik Slagter
2005-09-10T10:49:22Z

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On Sat, 2005-09-10 at 10:59 +0200, Janosch Machowinski wrote:
> > Is there a way to patch the FADT or to fool linux-acpi into it does
> > actually work (to at least be able to test the thing)?
> Shure, patch the verify functions in processor_idle.c ...
> But actually I think this is no good idea...

I tested it a few mins ago and there's good news and bad news ;-)

The very bad news is that my power meter is in a place I cannot reach at
the moment;

The good news is that CPU0 now has three C3 states and is almost
constantly running in that state;

The bad news is that CPU1 still reports only C1.

Could it be that the "restriction" of this chipset is, that the complete
system (including both cpu's) always must run in the same C-state? That
would be no real problem for me.