Fwd: [Gc] Performance of bdwgc7.2 had degraded compared to6.8 - the patch to test

djamel magri djamel.magri at googlemail.com
Mon Dec 20 06:27:49 PST 2010


Hi Ivan,

any idea when 7.2 stable version will be released?

Thanks

2010/12/17 Ivan Maidanski <ivmai at mail.ru>

> Hi Carsten,
>
> 1. What's about GC v7.1? Please tell us between which official release you
> see the speed degradation.
>
> 2. Please announce the flags passed when building GC (in both cases).
>
> Regards.
>
>
> Fri, 17 Dec 2010 19:49:32 +0100 "Carsten Kehler Holst" <kehler at pdc.dk>:
>
> > Did you try 6.8 with ALL_INTERIOR_POINTERS turned on?
> > Our problem is that we have had it on both in 6.8 and in 7.2a4.
> > It is quite possible that the problem has to do with
> ALL_INTERIOR_POINTERS but
> > something must have changed between 6.8 and 7.2.
> >
> > Regards
> > Carsten
> > Visual Prolog Team
> >
> >
> > On 17/12/2010, at 18.03, "Manuel.Serrano at inria.fr"
> > <Manuel.Serrano at inria.fr> wrote:
> >
> > >> If think the same (ALL_INTERIOR_POINTERS slow down the performance of
> > the benchmark).
> > >>
> > >> I think -D ALL_INTERIOR_POINTERS should present by default when
> > building the collector but the application which does not need pointers
> to
> > objects' interiors be recognized should call
> > GC_set_all_interior_pointers(0) at runtime before GC_INIT().
> > >>
> > >> PS. The presence of NO_EXECUTE_PERMISSION should typically positively
> > influence the speed, I think.
> > > I confirm that too. ALL_INTERIOR_POINTERS is the one that slows down
> the
> > > performance. The other two have no impact.d
> > >
> > > Cheers,
> > >
> > > --
> > > Manuel
>
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