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Re: gc_inline.h

From: Andy Wingo
Subject: Re: gc_inline.h
Date: Mon, 24 Mar 2014 23:01:06 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)

On Fri 22 Nov 2013 10:09, Andy Wingo <address@hidden> writes:

> It seems that the BDW GC, since version 7 or so, supports inline
> allocation with thread-local freelists.  See gc_inline.h.  We can
> probably improve our allocation speed significantly by using this
> allocator in Guile.  It would require adding a freelist to scm_i_thread,
> and passing the thread around wherever we would want inline allocation,
> but that is already the case in the VM.
> Could be a neat little project for someone -- mostly on master, where we
> require BDW-GC 7.2.

Not sure if I mentioned this, but I did this on master.  It's a minor
speed boost, just a few percent -- mostly because we avoid TLS lookups
to get the thread-local freelist within GC_malloc() and friends.  If we
passed the scm_i_thread* pointer to some new kind of gsubr, then
primitives could also do this; future work.


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