Preserved Topic: Maximum Usable Threads (Java)

How would one go about determining the optimul number of threads to run?

If I write a program that needs to parse 9999 different oporations it would be really easy to simply place 9999 threads running on this process. However, I am sure that only a fraction of these would actually run due to the CPU constraints.

Is there an algorithm one could use in there head to get the number of threads one should use.

IE. Currently I am running ~80% free CPU usage. I have a 1GHz processor. Therefore ~800MHz worth of free at approximately 100MHz per thread, I could run 8 threads to optimize CPU usage.

Anyone have any ideas?

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threads! uhhhh, i hate them!

though you cant really go without them! but i hate them!

Though Java doesn't impose limits on the number of threads running concurrantly, the OS does, so even if your program is running 9999 threads, only as few as a few hundred on some OS's will actually get CPU time. Until they are done Java just holds the other.

DigitalUbiquity

With this current information I would then think that if my program could optimally run 9999 threads, then I should have it run that many and let the operating system handle it.

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