rawhide report: 20050706 changes
Dave Jones
davej at redhat.com
Wed Jul 6 19:32:45 UTC 2005
On Wed, Jul 06, 2005 at 02:59:37PM -0400, Alan Cox wrote:
> On Wed, Jul 06, 2005 at 02:18:40PM -0400, Brian Gerst wrote:
> > What about the bloat and slowdown because of the unnecessary spinlocks
> > and more complex scheduler code?
>
> The locks shouldn't matter. AMD got locked operations on exclusive cache
> lines right. Its generally only Intel boxes that had high lock costs.
And the only UP EM64T's I've seen have HT. Though, that could be
disabled, but I expect that the folks disabling it are in a minority.
> Not sure on the scheduler.
It'll degenerate to a single runqueue on UP, so there shouldn't
be any of the complicated balancing going on. Bloat-wise, it's
a tiny amount of change.
Dave
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