Intermittent CPU usage

Chesterton · April 21, 2015, 06:44

We're occasionally finding that some model simulations are not fully using the CPUs or not distributing the problem properly.

Has anyone come across this before and is there anything in the setup which we need to avoid?

dmilano · April 29, 2015, 17:19

Do the low-CPU times match with data outputs? The solver has to wait while the data is written so the CPU usage would be minimal during the write.

Also, this plot is a little different from the one that we discussed via email. In this case the CPU usage appears to go to zero (rather than some small value) which is more indicative of a data dump.

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April 29, 2015, 17:19		#2
dmilano Member Join Date: Mar 2012 Posts: 72 Rep Power: 14	Do the low-CPU times match with data outputs? The solver has to wait while the data is written so the CPU usage would be minimal during the write. Also, this plot is a little different from the one that we discussed via email. In this case the CPU usage appears to go to zero (rather than some small value) which is more indicative of a data dump.