time issues and ZFS

[Adrian Chadd]

On 23 January 2013 06:58, Andriy Gapon <avg at 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