#6943: Make @parallel more robust.
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Reporter: boothby | Owner: boothby
Type: defect | Status: new
Priority: critical | Milestone:
Component: misc | Keywords:
Reviewer: | Author:
Merged: |
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Description changed by boothby:
Old description:
> The following should work:
>
> {{{
> @parallel
> @cached_function
> def foo(x):
> return x+1
> }}}
>
> however, when we attempt to evaluate foo...
>
> {{{
> sage: for k in foo(range(200)):
> ... print k
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/home/boothby/.sage/sage_notebook/worksheets/admin/69/code/995.py", line
> 7, in <module>
> for k in foo(range(_sage_const_200 )):\u000a print k
> File "", line 1, in <module>
>
> File "/scratch/boothby/sage/local/lib/python2.6/site-
> packages/sage/parallel/multiprocessing.py", line 63, in parallel_iter
> fp = pickle_function(f)
> File "fpickle.pyx", line 60, in sage.misc.fpickle.pickle_function
> (sage/misc/fpickle.c:746)
> AttributeError: 'CachedFunction' object has no attribute 'func_code'
> }}}
>
> If any callable object is picklable, it should work with the parallel
> decorator.
>
> Also, it should be possible to time individual processes out after a
> given amount of time.
New description:
At the present, @parallel calls pickle_function() on its argument.
However, the documentation claims that it should work with any callable
object. Additionally, it should be possible to stop computations after a
certain amount of time.
--
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6943#comment:2>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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