#12016: parallelism in Sage: just use value of 'MAKE'
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Reporter: jhpalmieri | Owner: GeorgSWeber
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.8
Component: build | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: John Palmieri, Jeroen Demeyer
Merged: | Dependencies: #11969
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Comment(by jdemeyer):
Replying to [comment:7 jhpalmieri]:
> Replying to [comment:6 jdemeyer]:
> > John, with your solution there is a lot of code duplication
(determining the number of threads is done in 3 places, potentially in 3
different ways). How about having code in `sage-sage` or `sage-env` to
determine the number of threads and saving it in an environment variable
`SAGE_NUM_PROCESSES`
>
> Sounds okay.
>
> > (which the user could set by hand; if not set, the value comes from
`MAKE` or `MAKEFLAGS`; if no `-j` option is given, set to 1).
>
> If you run "sage -tp <files>", should you use 1 process or more than 1?
The "-tp" option means "parallel", so perhaps the default should be more
than 1 in this case. In other cases (like docbuilding, for example), the
default should be 1.
Sure, that is what I meant. We should compute the value once, but in
`sage -tp` we can still decide to use the number of processes.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12016#comment:9>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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