This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)


terminates all parallel kernels from the list Kernels.
terminates the kernel k.
terminates the kernels , , ....
  • Closed kernels are removed from the list of kernels available for parallel computing, as given by Kernels.
Close all running parallel kernels:
Close all running parallel kernels:
Click for copyable input
Close any parallel kernels that may be running and launch the default kernels:
Close all kernels:
Launch copies of the previously running kernels:
Measure the speedup of the same calculation with different numbers of kernels used:
Distributed definitions and shared variables apply to running kernels and new ones:
Packages read with ParallelNeeds also apply to running and new kernels:
Close all running kernels and launch new ones:
The new kernels inherit previously distributed definitions and shared variables:
The new kernels also inherit packages read previously:
If no kernels are available, most parallel calculations are done sequentially:
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