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Problem with using both CPUs

Posted 8 apr 2020, 23:42 GMT-4 Cluster & Cloud Computing Version 5.5 1 Reply

Seyyed Moein Razavi Borghei
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Hi,

I have recently bought a workstation with two Xeon Gold CPUs each having 16 cores (expecting to speed up the simulation!). When I use only one CPU and 16 cores (by going to Preferences>Multicore and cluster computing), the computational time is 43 seconds and 32% is utilized during simulation. However, when I choose to use both sockets and all cores, the computational time rises to 47 seconds while utilization rate of CPU is 65% during the simulation!!

I would appreciate if someone could help me with this incosistency.

1 Reply Last Post 12 apr 2020, 10:31 GMT-4
Edgar J. Kaiser Certified Consultant
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Posted: 5 years ago 12 apr 2020, 10:31 GMT-4

It depends on the model if many cores or a dual/multiple cpu machine provides a benefit. The additional overhead can even slow down the computation.

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
It depends on the model if many cores or a dual/multiple cpu machine provides a benefit. The additional overhead can even slow down the computation.

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