Adding SMP Support

[Heinz_]

Hi, I've just owned an oldie Dual PentiumIII PC for low profile server and specially for programming. I just want to take advantage of SMP for my apps and dual procs system really takes advantage from apps only if the apps is programmed to support smp. I don't know if there's a sentence that should be added in my code or is a parameter in the compiler command. How can i add SMP supports in my C# apps? Thanx. Heinz Suez

[Dave Kreskowiak]

Rewrite your app to include multithreading support. It's not something that can just be "turned on" with a switch. Your application must be able to have parts that that run concurrently. For instance, breaking up a problem and having two threads each work on a seperate part of it. Or, in the case of say, a telnet server, one thread handles one client connection and another threads handles another. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

[Heinz_]

Oh, i though it was as simple as turning a switch on with a special syntax in my code or a parameter in the compilation command. So, you're saying that mi app will automatically detect 2 threads in my code and run each thread with a different processor? In that case i should play a lot with System.Threading

[Dave Kreskowiak]

No! You have to write your code to support multiple processors! Your code must be written to create it's own threads where appropriate. There is nothing that will do this for you. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

[Heinz_]

Ok, i'll write my own threads inside my code. System.Threading namespace is the way to go? Do i have or can i specify wich processor should handle my thread?

[Heinz_]

Hi again, i've been surfing the net for a bit help and found code samples referring our topic in intel's site. They use System.Threading for creating new threads (they have code that uses 4 different threads) but how do i know if these threads are handled by diferent processors? cause in the code they don't specify a processor to handle the thread and there's the possibility that a single proc may be running all the threads, how can i specify wich proc to handle threads? Or my pc finds a thread and runs it with a processor and when my pc finds a second thread it runs it with the other proc? Thanks for your help. Sorry if i'm slow learning.

[Dave Kreskowiak]

Heinz Suez wrote: but how do i know if these threads are handled by diferent processors? You don't! The system schedules which processor is going to handle which thread. Threads can even be moved between processors. 99% of the time, you really wouldn't have a reason to manually set the processor affinity. but, if you want to take a look at it, ProcessThread[^] in the System.Diagnostics namespace is what your looking for. Be sure to check out the ProcessorAffinity property. RageInTheMachine9532 "...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

[Heinz_]

Thanx man for your help, i got it all clear now.