#14636: ECL spkg : dirty workarounds?
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Reporter: Snark | Owner: jdemeyer
Type: defect | Status: needs_work
Priority: major | Milestone: sage-pending
Component: packages: standard | Resolution:
Keywords: | Work issues: rebase, SIGCHLD doctest
Report Upstream: N/A | Reviewers:
Authors: Julien Puydt | Merged in:
Dependencies: #11359 | Stopgaps:
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Comment (by nbruin):
Replying to [comment:30 Snark]:
> I'm working on a better set of modifications to also get rid of the
disabled threading stuff.
It's great if you can get that to work.
I considered enabling threading in ECL as fundamentally incompatible with
the way we use it in Sage. It will cause ECL to split off a dedicated
thread to handle asynchronous events and it will cause Boehm to repurpose
some exotic signals to synchronize thread on garbage collection, and those
signals will confuse the sage signal handler if it happens to receive
them.
We are switching signal handlers upon entry/exit of ECL. With multiple
threads it is not clear anymore whether sage or ECL should be in control
of asynch signals at any one time.
We won't get much benefit from the change either: our main use, Maxima,
uses global data structures everywhere and wasn't built with multi-
processing in mind at all. It will not be able to utilize multiple threads
for a long time.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14636#comment:31>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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