#16168: use p_iter_fork in projective_morphism
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Reporter: bhutz | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.2
Component: algebraic | Keywords: propjective morphism parallel
geometry | Authors:
Merged in: | Report Upstream: N/A
Reviewers: | Branch:
Work issues: | Dependencies:
Commit: |
Stopgaps: |
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projective_morphism uses parallel calls in several functions. It uses the
multiprocessing.py function parallel_iter. It seems on OSX that there is
some issue with the function. For example, calling possible_periods on a
function multiple times (usually 50 is sufficient) will result in a error
which varies. This does seem appear to occur on linux.
The p_iter_fork function seems more stable and does not have this issue.
While we are adjusting how parallel works, I think a ncpus kwd should also
be added.
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Ticket URL: <http://trac.sagemath.org/ticket/16168>
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