Re: [PATCH] Configure GMP to use GC allocation functions, remove bignum finalizers

[Ludovic Courtès]

Howdy!

Andy Wingo <address@hidden> skribis:

> On Tue 29 Nov 2011 14:18, address@hidden (Ludovic Courtès) writes:
>
>> Andy Wingo <address@hidden> skribis:
>>
>>> On Tue 29 Nov 2011 12:06, address@hidden (Ludovic Courtès) writes:
>>>
>>>> Could you run the stuff under gc-benchmarks/ with and without the
>>>> heuristic, as in [0]?
>>>>
>>>> [0] http://thread.gmane.org/gmane.lisp.guile.devel/7803
>>
>> IIRC the “Guile” lines below correspond to whatever guile is in $PATH.
>> Do you know what that is in your case?
>
> I fixed the environment to make it so that it was something post-2.0.3,
> but before these heuristics.

OK.

>> The funny thing is that the initial FSD (which is what is shown here)
>> has an impact, although one might think the initial value doesn’t matter
>> much since adjust_gc_something changes it anyway.
>
> The FSD set in the env. var is the minimum FSD, so it does matter.

Oh, right.

>> The other interesting thing is that it seems to be noticeably better,
>> even on pure Scheme code–i.e., code that only does GC_malloc, not
>> malloc.
>
> It could be that having a better baseline memory usage affects the
> specific benchmarks being run.  Dunno tho.  Growing the image size can
> also happen due to GC allocations though, so perhaps increasing
> allocation in those times does also make sense.

Food for thought.  :-)

Thanks,
Ludo’.