From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: basic question on Ada tasks and running on different cores
Date: Fri, 11 May 2012 19:33:15 -0500
Date: 2012-05-11T19:33:15-05:00 [thread overview]
Message-ID: <jokb4f$jvm$1@munin.nbi.dk> (raw)
In-Reply-To: johu2d$9vj$1@speranza.aioe.org
"NatarovVI" <4KCheshireCat@gmail.com> wrote in message
news:johu2d$9vj$1@speranza.aioe.org...
...
> you just can not do it in imperative, intertwined with dependencies,
> lobotomized manner. in functional languages - you can.
Sure, but I'm skeptical that the vast majority of programmers can deal with
any programming language that has the level of non-determinism needed to
support useful parallelism. Functional programming languages make this
worse, if anything.
Secondly, I'm skeptical that any language attempting fine-grained
parallelism can ever perform anywhere near as well as a language using
coarse parallelism (like Ada) and deterministic sequential semantics for the
rest. Any parallelism requires scheduling overhead, and that overhead is
going to be a lot higher for the fine-grained case, simply because there is
a lot more of it needed (even if it is conceptually simpler).
There are of course special cases where neither issue is a problem or can be
worked around, but for general purpose programming (especially embedded
programming, which is pretty much the only *real* programming going on today
:-), I don't see it happening. I wouldn't mind being wrong (even though it
would mean the end of my programming career; I already know that I'm not
productive in non-Ada languages - I cannot tolerate debugging very often).
Randy.
next prev parent reply other threads:[~2012-05-12 0:33 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-06 7:38 basic question on Ada tasks and running on different cores Nasser M. Abbasi
2012-05-06 7:59 ` Gautier write-only
2012-05-06 10:02 ` Simon Wright
2012-05-06 10:31 ` Ludovic Brenta
2012-05-06 14:14 ` Robert A Duff
2012-05-06 16:07 ` Vinzent Hoefler
2012-05-06 19:43 ` Ludovic Brenta
[not found] ` <15qdq7df9cji7htp52i9d5f8sqsgmisc3b@invalid.netcom.com>
2012-05-06 21:24 ` Ludovic Brenta
2012-05-06 14:13 ` Robert A Duff
2012-05-07 7:36 ` anon
2012-05-08 7:08 ` Maciej Sobczak
2012-05-08 9:02 ` anon
2012-05-08 9:52 ` Ludovic Brenta
2012-05-09 12:28 ` anon
2012-05-10 2:20 ` Randy Brukardt
2012-05-11 2:38 ` NatarovVI
2012-05-11 8:30 ` Georg Bauhaus
2012-05-16 15:40 ` NatarovVI
2012-05-16 18:03 ` Georg Bauhaus
2012-05-12 0:33 ` Randy Brukardt [this message]
2012-05-12 10:57 ` Stephen Leake
2012-05-15 6:55 ` Randy Brukardt
2012-05-15 22:54 ` Shark8
2012-05-16 15:54 ` NatarovVI
2012-05-17 0:11 ` Randy Brukardt
2012-05-17 1:06 ` Jeffrey Carter
2012-05-17 6:50 ` Dmitry A. Kazakov
2012-05-18 4:12 ` Randy Brukardt
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