Re: java thread for core 2 due processors

From:

Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>

Newsgroups:

comp.lang.java.help,comp.lang.java.programmer

Date:

Mon, 17 Aug 2009 11:44:44 -0700

Message-ID:

<Kyhim.160499$eS5.42104@newsfe25.iad>

Motaz K. Saad wrote:

Hello,

I am working on file processing (large number of files) which is
totally independent task for each file. I want to speedup processing
using java thread but I do not want overwhelm my processor (core 2 due
processor) with all threads at the same time.

I want to run 2 parallel threads simultaneously and wait until they
finish then run the next 2 threads. furthermore, each thread allocate
large amount of memory so I need to de-allocate the thread after
collecting the result from it.

I would appreciate if anyone direct my to similar set example
I would appreciate guideline and help

Thanks,
--
Motaz K. Saad

<soapbox>Please don't multi-post, cross-post instead.</soapbox>

Thinking about "threads" is probably not what you want. You probably
want to think about "Parallelizable Tasks". Look into the
java.util.concurrent classes. Especially the Executors class. You can
create a fixed thread pool executor.

I suggest creating a more threads than cores, if your threads are mostly
IO bound.

Hope this helps,
Daniel.

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>