From: Yaron Minsky <yminsky@gmail.com>
To: Xavier Leroy <Xavier.Leroy@inria.fr>
Cc: Bardur Arantsson <spam@scientician.net>, caml-list@inria.fr
Subject: Re: [Caml-list] Re: announce: callbacks-0.1
Date: Sat, 10 Sep 2005 09:04:26 -0400 [thread overview]
Message-ID: <891bd33905091006047a55b73f@mail.gmail.com> (raw)
In-Reply-To: <43228592.1040800@inria.fr>
On 9/10/05, Xavier Leroy <Xavier.Leroy@inria.fr> wrote:
> I would have been very interested in a profiling of your initial
> implementation. The only reason why the Caml hashtable can beat the
> global roots is that the latter are not generational: since the
> contents of registered global roots can change at any time without
> notifying the GC, all global roots must be scanned at every minor
> collection.
Yeah, we ran into this problem. We had an application where we ended
up registering about 200,000 global roots (most of which were
callbacks.) The application spent around 15% of the CPU all the time
just scanning global roots as part of minor collections. The
callbacks were moved into a hashtbl,and these problems went away
completely.
Yaron
next prev parent reply other threads:[~2005-09-10 13:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-08 16:31 Christophe Raffalli
[not found] ` <4320A68E.1060608@xs4all.nl>
2005-09-08 21:24 ` [Caml-list] " Christophe Raffalli
2005-09-08 23:31 ` Bardur Arantsson
2005-09-09 6:30 ` Bardur Arantsson
2005-09-10 7:04 ` [Caml-list] " Xavier Leroy
2005-09-10 7:31 ` Bardur Arantsson
2005-09-10 13:04 ` Yaron Minsky [this message]
2005-09-10 21:02 ` caml_register_unmutable_global_root Christophe Raffalli
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