Harvey J. Stein (hjstein@bfr.co.il)
14 Apr 1999 16:56:05 +0300
Greg Lindahl <lindahl@cs.virginia.edu> writes:
> > The Alpha Architecture Reference Manual, Third Edition (AARM)
> > describes strict rules for using interlocked memory
> > instructions. The forthcoming Alpha 21264 (EV6) processor and all
> > future Alpha processors are more stringent than their predecessors
> > in their requirement that these rules be followed. As a result,
> > code that has worked in the past despite noncompliance may now fail
> > when executed on systems featuring the new 21264 processor.
>
> I remember this coming up a while back, and it had to do with memory
> barriers being required by the architecture, but not enforced by the
> hardware until the 21264. However, single-processor programs can't run
> into this at all.
>
> Hopefully someone will correct me if I'm wrong.
What do you mean "single processor programs"? People are already
running linux SMP on dual processor 264s.
-- Harvey J. Stein BFM Financial Research hjstein@bfr.co.il-- To unsubscribe: send e-mail to axp-list-request@redhat.com with 'unsubscribe' as the subject. Do not send it to axp-list@redhat.com
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