Matlab workers

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In the Matlab jargon, matlab workers represent threads used by Matlab (or the MCR libraries when using the Dynamo standalone) when a computation is launched in parallel modus on a single node. A parallel computation in Dynamo should not use more matlab workers than the number of physical cores available in your system.

Find out the number of cores in a system

Trough Dynamo

In general, the most reliable way is to u

 >> feature('numcores')
MATLAB detected: 2 physical cores.
MATLAB detected: 4 logical cores.
MATLAB was assigned: 4 logical cores by the OS.
MATLAB is using: 2 logical cores.
MATLAB is not using all logical cores because hyper-threading is enabled. 

In Linux

In the system terminal, write:

cat /proc/cpuinfo | egrep "core id|physical id" | tr -d "\n" | sed s/physical/\\nphysical/g | grep -v ^$ | sort | uniq | wc -l

In the Mac

In the system terminal, write:

sysctl -a | grep machdep.cpu | grep core_count

sysctl -a | grep machdep.cpu | grep thread_count