[Info-vax] What choices are available to the OpenVMS Process Scheduler once all the CPUs are in use?
abrsvc
dansabrservices at yahoo.com
Wed Feb 10 14:09:14 EST 2016
On Wednesday, February 10, 2016 at 1:40:06 PM UTC-5, Carl Friedberg wrote:
> I would try turning off hyper-threads. I've never seen it make more than a
> few percent better perofrmance, and it can make things worse. Remember the
> VAX 782 (with 2CPUs, performance, IIRC, was of order .8 VUP. Hoff will
> remember better.
>
I remember that well. There was an analysis tool that would indicate whether or not your particular application would benefit from the additional CPU. Please note that the 782 was an ASMP machine (Asynchronous) and would only benefit compute bound applications.
Dan
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