#12016: parallelism in Sage: just use value of 'MAKE'
---------------------------+------------------------------------------------
Reporter: jhpalmieri | Owner: GeorgSWeber
Type: enhancement | Status: needs_work
Priority: critical | Milestone: sage-4.8
Component: build | Keywords:
Work_issues: | Upstream: N/A
Reviewer: | Author: John Palmieri, Jeroen Demeyer
Merged: | Dependencies: sage-4.8.alpha3 + #12096
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Comment(by jhpalmieri):
This looks good to me. Is it ready for review? Am I allowed to review it
since I wrote early drafts of some of the patches?
For a future ticket, it would be nice if you could set `MAKE='make -j
-lN'`, for some reasonable choice of `N`, and have it work. When I try
this, I have problems with the following spkgs, and I'm not sure why:
- zlib on OS X (2 cores) fails most of the time with `MAKE='make -j
-l3'`. [http://sage.math.washington.edu/home/palmieri/misc/zlib-1.2.5.log
Here's a log.]
- singular on sage.math fails all of the time, I think, with `MAKE='make
-j -l30'`.
[http://sage.math.washington.edu/home/palmieri/misc/singular-3-1-3-3.p1.log
Here's a log.]
(The Sage spkg used to fail before the latest round of patches using the
`-l` setting for a cap on the number of threads, and the same goes for
parallel doctesting. Setting `MAKE='make -j'` still causes these
failures. Should we just regard this setting as too dangerous, or try to
stop the failures by putting a cap on the number of processes if `-j` is
present but set to "unlimited" and `-l` is missing?)
These failures are not related to this ticket; they fail with or without
the patches. But the ticket makes it more appealing to just set `MAKE` as
above.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12016#comment:34>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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