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From: Karl Zilles <zilles@1969.ws>
To: Brian Hurt <bhurt@spnz.org>
Cc: Basile Starynkevitch <basile.starynkevitch@inria.fr>,
	Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Real Time Ocaml
Date: Mon, 19 Apr 2004 17:31:19 -0700	[thread overview]
Message-ID: <40846F57.9000201@1969.ws> (raw)
In-Reply-To: <Pine.LNX.4.44.0404191911490.6919-100000@localhost.localdomain>

Brian Hurt wrote:
> The only thing non-realtime in Ocaml is the garbage collection.  There are
> realtime garbage collectors, which do a certain amount of work every
> allocation, so that a) the cost of every allocation is constant (or close
> enough), and b) that all the work the collector ever needs to do is 
> distributed evenly among the allocations.  The current collector, while 
> perfect for non-realtime tasks (due to it's small average cost) is 
> horrible for realtime because of the huge difference between the common 
> case (5 instructions) and the worst case (mass collection)>

In a realtime garbage collector, how can you prove that you are freeing 
unused memory as fast as you allocate it?  In your attempt to put a 
boundry on time, doesn't it open up the possiblility that you might run 
out of space (even if your program has constant memory usage).

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  reply	other threads:[~2004-04-20  0:31 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-14 16:12 Erol Akarsu
2004-04-14 17:07 ` Basile STARYNKEVITCH
2004-04-15  6:51   ` Kenneth Knowles
2004-04-15 18:44     ` Brian Hurt
2004-04-16  7:55       ` Basile Starynkevitch
2004-04-16 12:33         ` Erol Akarsu
2004-04-16 15:12           ` skaller
2004-04-20  0:20         ` Brian Hurt
2004-04-20  0:31           ` Karl Zilles [this message]
2004-04-20  1:50             ` skaller
2004-04-14 18:21 ` Jon Harrop
2004-04-15  8:17 ` Hendrik Tews
2004-04-15 22:33   ` Erol Akarsu
2004-04-20  8:04     ` Hendrik Tews
2004-04-20 13:44       ` Eric Dahlman

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