Groups > comp.lang.java.programmer > #8424

Re: NIO multiplexing + thread pooling

From	Robert Klemme <shortcutter@googlemail.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: NIO multiplexing + thread pooling
Date	2011-09-30 20:57 +0200
Message-ID	<4E861127.9070109@googlemail.com> (permalink)
References	(7 earlier) <j62666$m5s$1@dont-email.me> <2026012.1217.1317394005581.JavaMail.geo-discussion-forums@prfc6> <j64mre$mj4$1@dont-email.me> <5746278.1755.1317396632057.JavaMail.geo-discussion-forums@prec11> <j64oem$ln$1@dont-email.me>

Show all headers | View raw

On 09/30/2011 05:49 PM, markspace wrote:
> On 9/30/2011 8:30 AM, Lew wrote:
>> markspace wrote:
>>> Not all multi-threading requires context switching either.
>>
>> Huh?
>
> Imagine a situation where the number of threads is matched to the number
> of CPUs. No need to switch out a context there (though it might happen
> anyway, there isn't a *need*). Just pass data back and forth. Memory
> barriers (happens-before in Java) is all you need in this case.

That sounds fairly theoretical.  On one hand a system typically has more 
processes (let alone threads) than cores.  On the other hand even if the 
number of cores is large enough you will have management overhead 
through the OS's scheduler.

Kind regards

	robert

Back to comp.lang.java.programmer | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

NIO multiplexing + thread pooling Giovanni Azua <bravegag@hotmail.com> - 2011-09-24 20:32 +0200
  Re: NIO multiplexing + thread pooling Tom Anderson <twic@urchin.earth.li> - 2011-09-24 20:46 +0100
    Re: NIO multiplexing + thread pooling Giovanni Azua <bravegag@hotmail.com> - 2011-09-24 23:09 +0200
    Re: NIO multiplexing + thread pooling Robert Klemme <shortcutter@googlemail.com> - 2011-09-25 11:33 +0200
      Re: NIO multiplexing + thread pooling Tom Anderson <twic@urchin.earth.li> - 2011-09-27 20:52 +0100
        Re: NIO multiplexing + thread pooling Robert Klemme <shortcutter@googlemail.com> - 2011-09-28 08:21 +0200
          Re: NIO multiplexing + thread pooling markspace <-@.> - 2011-09-28 08:20 -0700
            Re: NIO multiplexing + thread pooling Robert Klemme <shortcutter@googlemail.com> - 2011-09-28 18:56 +0200
              Re: NIO multiplexing + thread pooling markspace <-@.> - 2011-09-28 11:07 -0700
            Re: NIO multiplexing + thread pooling Peter Duniho <NpOeStPeAdM@NnOwSlPiAnMk.com> - 2011-09-28 17:39 -0700
              Re: NIO multiplexing + thread pooling markspace <-@.> - 2011-09-29 09:25 -0700
                Re: NIO multiplexing + thread pooling Lew <lewbloch@gmail.com> - 2011-09-30 07:46 -0700
                Re: NIO multiplexing + thread pooling markspace <-@.> - 2011-09-30 08:22 -0700
                Re: NIO multiplexing + thread pooling Lew <lewbloch@gmail.com> - 2011-09-30 08:30 -0700
                Re: NIO multiplexing + thread pooling markspace <-@.> - 2011-09-30 08:49 -0700
                Re: NIO multiplexing + thread pooling Robert Klemme <shortcutter@googlemail.com> - 2011-09-30 20:57 +0200
  Re: NIO multiplexing + thread pooling "John B. Matthews" <nospam@nospam.invalid> - 2011-09-25 00:26 -0400
    Re: NIO multiplexing + thread pooling Giovanni Azua <bravegag@hotmail.com> - 2011-09-25 11:13 +0200

csiph-web