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- Subject: Re: Next Version of Lua?
- From: Ralph Hempel <rhempel@...>
- Date: Sat, 13 Jun 2009 15:50:51 -0400
Enrico Colombini wrote:
Ralph Hempel wrote:
The current default garbage collector parameters request a doubling
of the current RAM usage when RAM runs out.
I may be wrong, but I interpret the manual description of 'pause' as
meaning that the collector merely doubles the allocation threshold where
a new collection will forcibly take place. I can't find sbrk() in the code.
Yes, you are correct. The call to sbrk() happens when your own heap gets
Anyway, as I said last week, I'm not sure I really understand how this
mechanism works. To avoid the risk of memory overrun in an embedded
system, I ended out checking allocation level periodically with 'count'
and forcing a gc at a fixed threshold, then later checking it again
(suggestions for a better way are welcome).
A tunable parameter for the garbage coellctor that either works the
way it currently does (as a percentage) or as an absolute value would
be in interesting compromise.