Groups > comp.lang.java.programmer > #8387

Re: NIO multiplexing + thread pooling

From	markspace <-@.>
Newsgroups	comp.lang.java.programmer
Subject	Re: NIO multiplexing + thread pooling
Date	2011-09-28 08:20 -0700
Organization	A noiseless patient Spider
Message-ID	<j5vdvo$kon$1@dont-email.me> (permalink)
References	<CAA3EEF8.78BF%bravegag@hotmail.com> <alpine.DEB.2.00.1109242028540.12593@urchin.earth.li> <9e8aqfFnorU1@mid.individual.net> <alpine.DEB.2.00.1109272044210.14737@urchin.earth.li> <9efsnrFoviU1@mid.individual.net>

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On 9/27/2011 11:21 PM, Robert Klemme wrote:
>
> Because you reduce synchronization overhead. If you have 1 or X threads
> doing the selecting and distributing the work over M >> X handler
> threads for N >> M channels then you have much higher potential for
> collisions than if you have X * (1 selector for M/X handler threads).

<http://www.myfacewhen.net/uploads/954-not-sure-if-serious.jpg>

Really?  Is synchronization, relative to an app that's doing network IO, 
a serious concern?  I can't imagine that synchronization overhead is 
even within a three orders of magnitude of the IO overhead.

Note that poor structuring, like organizing your app such that the whole 
thing is serialized on one lock, isn't synchronization over head.  It's 
just blocked.

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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

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