Mathematica > Systems Interfaces & Deployment > Parallel Computing > Resource Sharing in Parallel Computing > SetSharedVariable
Mathematica > Core Language > Tuning & Debugging > Parallel Computing > Resource Sharing in Parallel Computing > SetSharedVariable
BUILT-IN MATHEMATICA SYMBOL

SetSharedVariable

SetSharedVariable[s1, s2, ...]
declares the symbols as shared variables whose values are synchronized among all parallel kernels.

DetailsDetails

  • The unique value of a shared variable is maintained by the master kernel and every access on a parallel subkernel is synchronized through the master kernel.
  • Shared variables without a value evaluate to Null.

ExamplesExamplesopen allclose all

Basic Examples (1)Basic Examples (1)

Make xs be a (global) shared variable:

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Each subkernel increments the (global) shared variable value:

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Out[2]=
In[3]:=
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Out[3]=

Without sharing, each subkernel has its own (local) copy of the variable:

In[4]:=
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Out[5]=
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Out[6]=

Scope (4)Scope (4)

Generalizations & Extensions (1)Generalizations & Extensions (1)

Applications (5)Applications (5)

Properties & Relations (1)Properties & Relations (1)

Possible Issues (1)Possible Issues (1)

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