Re[6]: Fwd: [Gc] Performance of bdwgc7.2 had degraded compared to6.8 - the patch to test

Ivan Maidanski ivmai at mail.ru
Mon Dec 20 09:52:16 PST 2010


Hi,

Yes, we need at least a next alpha release (the previous one is one year old). Anyway, it's up to Hans to decide...

Regards.

Mon, 20 Dec 2010 15:27:49 +0100 djamel magri <djamel.magri at googlemail.com>:

> 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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> > http://www.hpl.hp.com/hosted/linux/mail-archives/gc/
> >



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