Multi-threaded in multi-processor

[chee0007]

Hi,
I am new to multi-threading, and with our present technology with dual core processors, what kinds of setup can optimise multi-threading efficently?

Can visual c++ or .NET API programs running on Window XP/2K platform do multi-threading efficently on a multi-processor system(dual core) like what a QNX machine could do?

THanks

[googler]

Yes.

[Arjay]

On Windows NT based machines (NT4, 2000, 2003, XP, Vista, etc.), the thread scheduler handles deciding which processor threads get to run. If the machine is a single-proc/single-core machine, all threads will get executed on the one processor (naturely). On dual core/dual processor machines, the scheduler will decide the best core processor for the particular thread. As a programmer, all you need to be concerned with is making sure you synchronize any data that is shared between threads using a cs, mutex, or some other synch object and let the scheduler take care of the rest. I should mention that you can set up the thread processor affinity, but generally you don't need to do this.

[Ejaz]

Perhaps you find this (http://www.codeguru.com/cpp/w-p/system/threading/article.php/c14005/) interesting ;)

[exterminator]

Wow! What happened? The posts following Ejaz's are gone! Something wierd happening with codeguru forums lately.

[Ejaz]

Oops, my bad :blush: . I split the thread. Its here (http://www.codeguru.com/forum/showthread.php?t=432010).

[exterminator]

No problem. Thanks! I had the feeling that it was split but didn't look into GDT. :)