Is the C3 possible with SMP?
Alexander Motin <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile,gmane.os.freebsd.devel.acpi |
|---|---|
| Message-ID | <[email protected]> |
Hi. I have tried to enable C3 state on my Core2Duo laptop and found that it is not working good. System HZ timer stops during CPU sleep. After some investigation I have found that it is due to LAPIC timer used for HZ stopped during C3 state (same as during AMD's C1E). So the question is: Is it possible (or planned) to make it work somehow? For example, by using some external timer instead of LAPIC's one? ACPI reports about 20% less idle power consumption with C3 state comparing to C2. It would be interesting to get additional half an hour on battery. -- Alexander Motin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"