Re: getting processor numbers

Andi Kleen
2007-04-03T17:30:13Z

On Tue, Apr 03, 2007 at 06:22:41PM +0100, Alan Cox wrote:
> > benefit for the common use cases. But as it is, the number of
> > processors is not necessarily constant over the lifetime of a process.
> > The machine architecture is.
>
> Not once you have migration capable virtualisation it isnt.

Migration is fundamentally incompatible with many CPU optimizations.
But that's not a reason to not optimize anymore.

But I guess luckily most migration users will be able to live
with a little decreased performance after it.

-Andi