Messages in this thread | | | Subject | Re: ACPI PM Timer vs. C1 halt issue | From | john stultz <> | Date | Wed, 10 Mar 2004 13:49:32 -0800 |
| |
On Tue, 2004-03-09 at 14:45, Prakash K. Cheemplavam wrote: > john stultz wrote: > > On Tue, 2004-03-09 at 13:35, Prakash K. Cheemplavam wrote: > > > >>I found out what causes higher idle temps when using mm-sources and > >>2.6.4-rc vanilla sources: If I use PM Timer as timesource, it seems the > >>C1 halt isn't properly called, at least CPU disconnect doesn't seem to > >>work, thus leaving my CPU as hot as without disconnect. > [snip] > > > > Sounds like a bug. I'm not very familiar w/ the ACPI cpu power states, > > is there anything you have to do to trigger C1 Halt? Or is it just > > called in the idle loop? > > It should be called within the idle loop.
Hmm. I'm still stumped. Looking at acpi_processor_idle(), the C1 state doesn't touch the ACPI PM timer. The C2 and C3 states do, but they just read.
Dominik: Do you have a clue on this?
thanks -john
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |