ansaurus

Question

How to setup matlabpool for multiple processors?

Answer 1

+1 A:

MATLAB isn't seeing all 8 cores. Set it manually. Parallel menu -> Manage Configurations. Right-click on the "local" line. In the scheduler tab, set the "Number of workers available to scheduler" to 8.

Original answer was a question getting more detail:

Are you trying to use MDCS on EC2 (and MATLAB's user interface on your PC), or are you trying to run MATLAB's user interface and PCT on EC2 (via ssh or vnc or the like)?

DaveWalend 2010-03-29 13:33:15

I am remoting into the EC2 instance - as if it was any machine - I am running everything on that instance: matlab interface and parallel computing toolbox. I don't need MDCS as I want to use thei 8 processors on that same machine. It really makes no difference that it is an ec2 instance or any other machine. I am capable of using the 2 cores on my laptop (running locally) but matlab doesn't detect the 8 processors on the ec2 instance (again locally on the instance).

JohnIdol 2010-03-29 18:50:45

For some reason, MATLAB isn't seeing all 8 cores. Maybe you can set it manually. (Haven't tried it on EC2, but it works on my four-core box.)No promises, but try the Parallel menu -> Manage Configurations. Right-click on the "local" line. In the scheduler tab, set the "Number of workers available to scheduler" to 8.Please post results back here.

DaveWalend 2010-03-29 20:49:53

Thanks - I will try that and report back - I think the issue is that it is not a single processor with 8 cores, it's 8 different processors each of which has 1 core (in computer properties it says "8 processors"). On my laptop I have 2 cores on the same processor and they are detected successfully.

JohnIdol 2010-03-30 13:33:14

It worked - tnx a lot, I've got now 8 CPUs blasting off at 100%! If you update in your answer I'll mark as accepted :)

JohnIdol 2010-03-30 22:03:09

ansaurus

tags:

views:

answers:

How to setup matlabpool for multiple processors?

related questions