Re: Synchronization Question

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 14 Sep 2009 13:46:13 -0700
Message-ID:
<4aaeab94$0$19364$b9f67a60@news.newsdemon.com>
Kenneth P. Turvey wrote:

I don't care about which thread value is actually visible at the end. As
long at the value is one of the values written by one of the threads,
that will be good enough. I think the AtomicIntegerArray would have even
worse performance characteristics than using a synchronized block around
the various updates, so for me this would be out of the question.

My problem has been solved, but this thread is quite interesting.

I think this is the first time I've written a multi-threaded program that
required no explicit synchronization in the entire thing. All the
synchronization has been implicit using thread joins to handle memory
visibility.

I haven't avoided having to think carefully about the issues, but
performance was a high priority for this code and avoiding the
synchronization costs has really helped.


I'm just curious but can you tell us approximately how many writes the
threads will make and how many elements in the array?

Thanks,

--

Knute Johnson
email s/nospam/knute2009/

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