either me or GC sux badly (GC don't reuse free memory)

ketmar via Digitalmars-d digitalmars-d at puremagic.com
Wed Nov 12 04:22:08 PST 2014


On Wed, 12 Nov 2014 12:05:25 +0000
thedeemon via Digitalmars-d <digitalmars-d at puremagic.com> wrote:

> On Wednesday, 12 November 2014 at 11:05:11 UTC, ketmar via 
> Digitalmars-d wrote:
> >   734003200
> > address space" (yes, i'm on 32-bit system, GNU/Linux).
> >
> > the question is: am i doing something wrong here? how can i 
> > force GC to stop eating my address space and reuse what it 
> > already has?
> 
> Sure: just make the GC precise, not conservative. ;)
> With current GC implementation and array this big chances of 
> having a word on the stack that looks like a pointer to it and 
> prevents it from being collected are almost 100%. Just don't 
> store big arrays in GC heap or switch to 64 bits where the 
> problem is not that bad since address space is much larger and 
> chances of false pointers are much smaller.
even with NO_INTERIOR the sample keeps failing (yet after more
iterations). no, really, there is ALWAYS a pointer exactly to the start
of the allocated buffer somewhere? i feel something smelly here.
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