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    <p>So, if I correctly understand your problem, you have one thread to fetch data, and several threads to analyse the fetched data. Your problem is that the threads are not correctly synchronized to run together and take full advantage of the processor.</p> <p>You have a tipical producer-consumer problem with a single producer and several consumers. I advise you to remake your code a bit to have, instead, several independent consumer threads that are always waiting for resources to be available and only then running. This way you guarantee the maximum processor use.</p> <p>Consumer thread:</p> <pre><code>while (!terminate) { synchronized (Producer.getLockObject()) { try { //sleep (no processing at all) Producer.getLockObject().wait(); } catch (Exceptions..) } MyObject p = Producer.getObjectFromQueue(); //this function should be synchronized //Analyse fetched data, and submit it to somewhere... } </code></pre> <p>Producer thread:</p> <pre><code>while (!terminate) { MyObject newData = fetchData(); //fetch data from remote location addDataToQueueu(newData); //this should also be synchronized synchronized (getLockObject()) { //wake up one thread to deal with the data getLockObject().notify(); } } </code></pre> <p>You see that this way, your threads are always performing useful work or sleeping. This is just draft code to exemplify. See more explanation here: <a href="http://www.javamex.com/tutorials/wait_notify_how_to.shtml" rel="nofollow">http://www.javamex.com/tutorials/wait_notify_how_to.shtml</a> and here: <a href="http://www.java-samples.com/showtutorial.php?tutorialid=306" rel="nofollow">http://www.java-samples.com/showtutorial.php?tutorialid=306</a></p>
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    1. POSporadic problems in running a multi-threaded Java project in Win7
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    1. COThanks for the reply, and I will look into the details. But it appears to be that you're missing a very crucial and significant point; my code does get full processor power when I run it on my machine or another machine that runs Win7. What I am asking about is the reason of the differential performance on these (hardware-wise) similar machines.
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    2. COI had the very same issues some years ago, when working on a project that would run in several OSs. The difference you get is due to the thread schedulers of the operating systems. Though it is the java virtual machine to deal with the scheduling, it is still the operating system that dictates when the jVM works, and when it can access the remote systems you are using. It is very hard to specify the behaviour diference, and I believe you might be wasting your time in trying to find out. In the end, it will always be your code's fault. Try my approach, and tell me if you notice any improvement.
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