#715: Parents probably not reclaimed due to too much caching
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Reporter: robertwb | Owner: somebody
Type: defect | Status: needs_work
Priority: major | Milestone: sage-4.8
Component: coercion | Keywords: weak cache coercion
Work_issues: avoid regression | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies: #9138, #11900
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Comment(by SimonKing):
Replying to [comment:73 jpflori]:
> Good point about #11521, I'd say because that what I was firstly
interested in.
>
> Without it applied, the flaky behavior seem to disappear.
Good!
> I'll post timings with all patches, with all patches except for #11521,
and with no patches in a few hours.
OK, but I guess the timings I provided should be enough to show that the
patch can not remain as it is now.
> Anyway I guess Volker is right and even with just #715 applied we should
check that actions do not get garbage collected continuously as your
timings suggest.
Yep. Two potential solutions:
1. Find out why apparently not all actions are registered in the parent
(because then we would have a strong reference as long as at least the
domain is alive).
2. Play with the idea to have a strong reference on the action but a weak
reference from a functor to its domain and codomain.
I'm trying the latter now.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/715#comment:74>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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