Andrei Dorofeev wrote: > Both TSC and LAPIC timer keep ticking in C2 so it's pretty safe to use > instead of C1 (HLT/MWAIT). The latency is only ~4 times > longer than HLT.
Hmm..., the caveat is that at more than one OEM maps the C3/C4/C5 states to ACPI C2, so we can't guarantee TSC works in ACPI C2. -Aubrey
