Li, Aubrey <> wrote: > Bill.Holler wrote: > >>> Oh, oh..., that's right, we should use TSC. >>> But since we will support platform on which TSC is not reliable in >>> deep c-state, I suggest we use PM timer to make code a bit easier to >>> readable, :- >> >> Do you recommend the HPET timer or the ACPI PM timer as a >> reliable timer? We are currently investigating the HPET timer. >> > ACPI PM timer is already supported in the ACPICA. > Take a look at $(SRC)/uts/intel/io/acpica/hardware/hwtimer.c > PM timer is recommended in ACPI spec for deep c-state. > But I think both can be used as a reliable source.
If so, PM timer should be a better choice because it's more standardized than HPET and PM timer with 250 precision should be enough for C-state. > _______________________________________________ > tesla-dev mailing list > tesla-dev at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/tesla-dev
