From: "Mattias Engdegård" <mattias@virtutech.se>
To: jon@ffconsultancy.com
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Faking concurrency using Unix forks and pipes
Date: Wed, 30 May 2007 11:56:31 +0200 [thread overview]
Message-ID: <200705300956.l4U9uV517133@virtutech.se> (raw)
In-Reply-To: <200705300954.32784.jon@ffconsultancy.com> (message from Jon Harrop on Wed, 30 May 2007 09:54:32 +0100)
>> How much does a concurrent GC actually buy in comparison to
>> multiple processes each with their own GC and a robust way
>> of passing data between processes?
>
>1. Shared memory and locks should be much faster for synchronization than
>marshalling between processes.
>
>2. Forking results in multiple GCs redundantly traversing the same heap and,
>worst case, it may end up copying the entire heap in the child process in
>order to deallocate it.
3. Cores on the same chip often share at least one cache level,
and the same is trivially true for threads in the same core.
In software-speak, this means that processes should share the read-only
part of their working set as much as possible.
next prev parent reply other threads:[~2007-05-30 9:56 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-30 3:42 Jon Harrop
2007-05-30 4:10 ` [Caml-list] " Erik de Castro Lopo
2007-05-30 4:12 ` Jonathan Bryant
2007-05-30 9:45 ` Benedikt Grundmann
2007-05-30 7:02 ` Oliver Bandel
2007-05-30 7:31 ` Jon Harrop
2007-05-30 16:22 ` David Teller
2007-05-30 7:34 ` Loup Vaillant
2007-05-30 8:02 ` Jon Harrop
2007-05-30 8:13 ` Erik de Castro Lopo
2007-05-30 8:30 ` Loup Vaillant
2007-05-30 8:32 ` Loup Vaillant
2007-05-30 8:50 ` Jon Harrop
2007-05-30 12:13 ` Richard Jones
2007-05-30 8:54 ` Jon Harrop
2007-05-30 9:56 ` Mattias Engdegård [this message]
2007-05-30 12:15 ` Richard Jones
2007-05-30 17:46 ` Pablo Polvorin
2007-05-30 19:14 ` Erik de Castro Lopo
2007-05-30 7:13 ` Florian Hars
2007-05-30 11:31 ` Gerd Stolpmann
2007-05-30 8:40 ` Luc Maranget
2007-05-30 9:10 ` Erik de Castro Lopo
2007-05-30 9:25 ` Erik de Castro Lopo
2007-05-30 9:25 ` Jon Harrop
2007-05-30 9:41 ` Joel Reymont
2007-05-30 16:05 ` David Teller
2007-05-30 9:21 ` Joel Reymont
2007-05-30 16:10 ` David Teller
2007-05-30 9:52 ` Thomas Fischbacher
2007-05-30 12:03 ` Richard Jones
2007-05-30 16:03 ` Granicz Adam
2007-05-30 22:09 ` Jon Harrop
[not found] <5F7D2956-2B0A-465A-8AC2-06D7EDC457F9@valdosta.edu>
2007-05-30 19:44 ` Fwd: " Jonathan Bryant
2007-05-30 19:57 ` Erik de Castro Lopo
2007-05-30 20:05 ` Jonathan Bryant
2007-05-30 22:08 ` Jon Harrop
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