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| nisse at lysator.liu.se ( |
 Posted: Tue Aug 24, 1999 8:34 am |
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Guest
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Hello,
I'm a little curious about the garbage collection used in Erlang. The
question arose in a discussing about using Erlang on "real-time"
systems. Do you use some fancy incremental or real-time collector?
I'm mostly ignorant of the Erlang language, but I'm interesting in how
GC is being used in the Real World(tm).
Regards,
/Niels M |
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| klacke at bluetail.com |
| Posted: Tue Aug 24, 1999 11:07 am |
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Guest
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> I'm a little curious about the garbage collection used in Erlang. The
> question arose in a discussing about using Erlang on "real-time"
> systems. Do you use some fancy incremental or real-time collector?
>
> I'm mostly ignorant of the Erlang language, but I'm interesting in how
> GC is being used in the Real World(tm).
>
GC in Erlang is done by a generational collector _per process_.
Each process has its own stack and two heaps, (2 generations)
Once a GC is needed for a process, either a generational or a
fullsweap collection is performed on that process.
No real time characteristcs are achieved at all since a single process
can grow arbitrarily large. However GC time is bounded by the
size of the largest process in the system. This is dynamic and thus
no *real* real time characteristcs at all.
The generational algorithm applied is classical cheeney but with
two generations. This algorithm is from the mid 60'ies !! i think.
/klacke
Claes Wikstr |
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