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WaitNext
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BUILT-IN MATHEMATICA SYMBOL
WaitAll
ParallelSubmit
ParallelTry
EvaluationObject
See Also »
|
Concurrency
Parallel Computing
Summary of New Features in 7.0
New in 7.0: Alphabetical Listing
New in 7.0: Systems Interfaces & Deployment
More About »
WaitNext
WaitNext
waits until the first evaluation represented by any of the
finishes, then returns its result, the corresponding
, and the list of remaining
.
MORE INFORMATION
The
are
EvaluationObject
expressions obtained by submitting expressions for concurrent evaluation using
ParallelSubmit
.
WaitNext
returns a list
, where
res
is the result of the finished evaluation,
eid
is its
EvaluationObject
, and
eids
is the list of remaining evaluations.
The last element in the list produced by
WaitNext
is suitable for another call to
WaitNext
.
EXAMPLES
CLOSE ALL
Basic Examples
(1)
Submit a number of integer factorizations:
Wait until the fastest one is done:
Wait for the next one:
Finally, wait for all remaining ones:
Submit a number of integer factorizations:
In[1]:=
Out[1]=
Wait until the fastest one is done:
In[2]:=
Out[2]=
Wait for the next one:
In[3]:=
Out[3]=
Finally, wait for all remaining ones:
In[4]:=
Out[4]=
Applications
(1)
Test
for primality, returning
$Failed
if it is not prime:
Adaptively schedule search jobs to keep all kernels busy until a result has been found or the:
Properties & Relations
(2)
ParallelTry
is essentially implemented in terms of
WaitNext
:
Scheduled evaluations no longer needed can be aborted with
AbortKernels
:
Possible Issues
(2)
No more than
$KernelCount
evaluations are initially run to find the fastest one:
Each evaluation should be waited for exactly once:
One of the evaluation objects has already completed:
SEE ALSO
WaitAll
ParallelSubmit
ParallelTry
EvaluationObject
MORE ABOUT
Concurrency
Parallel Computing
Summary of New Features in 7.0
New in 7.0: Alphabetical Listing
New in 7.0: Systems Interfaces & Deployment
New in 7