How to list core usage by apps?

[ebt]

I've had a dabble with top & activity monitor, but cant quite see how to get a list of core usage by applications.

Eg.

Core 1, xx% used. yy% Safari, zz% itunes.
Core 2, xx% used. yy% mail, zz% MS Word.

Any bright ideas?

 

[orvn]

I can point you in a direction:

Use ps.
man ps for more.
Something to do with ps -P

 

[ebt]

Thanks for the reply. I'll admit I may have my stupid mode engaged, but I couldnt see any reference to which core the process is running on (yes, I've mashed my fingers into the keyboard for ages).

The -p switch just seems to be a more verbose output for a specific PID, unless I missed something? (entirely possible).

Im not sure if its relevant, but Im sitting on OSX10.6.8

 

[ebt]

looks like this one is hard to do then I guess

 

[mfram]

It's hard to do because it isn't really that useful. Mac OS is a symmetrical multi-processing system. The operating system task scheduler is free to put any task that needs the CPU on any CPU at any time. The only real penalty to moving a task to a different CPU is possible CPU cache inefficiency. But it is outweighed by the fact a CPU is available to service the waiting task.

It's not like Safari only runs on CPU 1. As a matter of fact many of these programs are multi-threaded and it's possible Safari could have multiple threads running on multiple CPUs at once.