From: Jesper Louis Andersen <jesper.louis.andersen@gmail.com>
To: Alain Frisch <alain@frisch.fr>
Cc: Dmitry Bely <dmitry.bely@gmail.com>, caml-list@inria.fr
Subject: Re: [Caml-list] Compiler bug?
Date: Wed, 8 Aug 2012 20:22:52 +0200 [thread overview]
Message-ID: <CAGrdgiUeyVXoG=jQN6EYUREXkdPG1PgyWw_U4t3veMSXzmXxQw@mail.gmail.com> (raw)
In-Reply-To: <5022A9FE.4050006@frisch.fr>
On Wed, Aug 8, 2012 at 8:03 PM, Alain Frisch <alain@frisch.fr> wrote:
> I'm not sure, someone else would have to reply! I guess that these
> registers are supposed to be preserved by the callee in the x64 ABI (and
> obviously, they don't hold pointers to OCaml values, so they don't have to
> be tracked by the GC).
Also, the GC itself will not be using Floating Point code at all, so
we can save a lot by not saving/restoring these values on the stack.
It is akin to what the Linux kernel does: trap on the first FP
instruction and only then do work to save/restore the FP context - but
here we know a priori we never will access FP. By doing so we can cut
the time to the GC call down - and reap the benefits by having a
faster GC cycle.
--
J.
next prev parent reply other threads:[~2012-08-08 18:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-06 10:04 Dmitry Bely
2012-08-06 10:11 ` Alain Frisch
2012-08-06 10:20 ` Dmitry Bely
2012-08-06 10:34 ` Alain Frisch
2012-08-06 11:03 ` Dmitry Bely
2012-08-06 11:32 ` Alain Frisch
2012-08-06 12:16 ` Dmitry Bely
2012-08-07 1:35 ` Cedric Cellier
2012-08-08 16:03 ` Dmitry Bely
2012-08-08 18:03 ` Alain Frisch
2012-08-08 18:22 ` Jesper Louis Andersen [this message]
2012-08-08 18:40 ` Dmitry Bely
2012-08-08 19:29 ` Fabrice Le Fessant
2012-08-08 23:34 ` Anil Madhavapeddy
2012-08-09 0:53 ` Francois Berenger
-- strict thread matches above, loose matches on Subject: below --
2006-05-17 23:14 compiler bug? Dan Koppel
2006-05-17 23:33 ` [Caml-list] " John Carr
2006-05-18 17:15 ` Xavier Leroy
2006-05-18 17:34 ` Jacques Carette
2006-05-18 17:46 ` Xavier Leroy
2006-05-18 19:31 ` Jacques Carette
2006-05-18 20:07 ` David Brown
2006-05-18 20:15 ` Jacques Carette
2006-05-18 20:20 ` Alain Frisch
2006-05-18 18:19 ` skaller
2006-05-18 18:53 ` Jacques Carette
2006-05-19 1:47 ` skaller
2006-05-19 2:17 ` Brian Hurt
2006-05-19 3:11 ` skaller
2006-05-19 16:48 ` Jacques Carette
2006-05-19 19:10 ` skaller
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