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Old 2021-07-24, 14:36   #36
drkirkby
 
"David Kirkby"
Jan 2021
Althorne, Essex, UK

44710 Posts
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Quote:
Originally Posted by axn View Post
Is the HT turned off (or is there no HT)? It is only reporting 1 logical processor per core and a total of 52 logical cores.
It's probably turned off. I did turn it off in an attempt to make it easier to sort out the problems of getting this on cores I wanted. I thought the HT was just making life more difficult. I thought I had turned it back on again, but I must have overlooked that. The output from

Code:
numactl -H
is in this thread.

https://www.mersenneforum.org/showpo...9&postcount=35
That shows cpus numbered 0 to 103.
So do I need to use numactl or not now? Of course, whilst 4 workers is optimal with one process running, it may well not be if two processes are running. I'll give that a try.
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