Re: [Sbcl-help] Memory usage/gc issues

[Richard M K. <kr...@pr...>]

Robert Uhl writes:
> Does anyone have some suggestions for dealing with and optimising SBCL's
> memory utilisation?  I'm working on a science-fiction game which
> generates solar systems and I've been running out of heap space.  What's
> strange is that I can generate 10,000 systems in one profiling run but
> the _second_ run crashes.  I've looked and looked and none of those
> systems should still be referenced anywhere in memory; the loop looks
> like this:
> 
>   (unwind-protect
>        (progn (sb-profile:reset)
>               (sb-profile:profile "TRAVELLER")
>   	      (dotimes (i 10000) (generate-system))
>   	      (sb-profile:report))
>      (sb-profile:unprofile))
> 
> I've looked at all of my code, and none of it is storing any of the
> systems in any globals; moreover, from the code above one can see that *
> and friends shouldn't be referencing and of the first run's data.
> Neither should the previous profiling run's data be referenced, since I
> call SB-PROFILE:RESET.  And yet, fairly reliably, I exhaust the heap and
> SBCL drops down to LDB.
> 
> Just for laughs & giggles, I've thrown in an SB-EXT:GC after the
> GENERATE-SYSTEM--same result.

What happens if you use (sb-ext:gc :full t)?

--
RmK