On 23 January 2013 06:58, Andriy Gapon <a...@freebsd.org> wrote: > I don't think that this is true of x86 hardware in general. > You might have hit some limitation or a quirk or a bug or an erratum for some > particular hardware. > > E.g. a chipset on this machine has a bit described as such: > "Set to 1 to skip the C state transition if there is break event > when entering C state." > The bit is set indeed and as far as I can tell the behavior matches the > description. > > Most modern (non-embedded) machines seem to behave this way. Attempt to enter > a > deeper C state while a break event is pending still incurs some overhead, but > it's > not as bad as waiting for the next break event.
I'll reverify the behaviour on my netbooks when I'm back home. It may be a quirk of an older 9.x, which is fixed in -HEAD. It may be a quirk of the older generation celeron hardware - in which case, we need to tell the user somehow.. Adrian _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
