Re: MPS symbols

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Re: MPS symbols

From: Gerd Möllmann

Subject: Re: MPS symbols

Date: 2024年6月28日 16:13:56 +0200

User-agent: Gnus/5.13 (Gnus v5.13)

Helmut Eller <eller.helmut@gmail.com> writes:
> On Fri, Jun 28 2024, Gerd Möllmann wrote:
>
>> igc--roots is a DEFUN in igc.c returning information about roots. In the
>> end, the plan is that every root has a label, and all are displayed in
>> igc-roots-stats, so that one can see what is going on wrt roots over
>> time.
>
> Hm, I see some odd numbers in *igc roots*:
>
> bc-stack ambig 1 4194304
> pure ambig 1 41333328
>
> 40 MB pure space :-). It looks like PURESIZE isn't the number of words
> but the number of bytes. Or so it seems in alloc.c:
>
> EMACS_INT pure[(PURESIZE + sizeof (EMACS_INT) - 1) / sizeof
> (EMACS_INT)] = {1,};
Haven't seen that - mine has no pure space :-).
> 4 MB bc-stack also seems a lot. But it's less obviously wrong.
It's actually large, at least in principle. Hence my attempt to figure
out a more reasonable end address in scan_bc
 #define BC_STACK_SIZE (512 * 1024 * sizeof (Lisp_Object))
> It helps to sometimes look at basic things :-)
👍

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