[Lava-users] What count in multinode mean?

Hello, I have a question about "count" in lava multinode, for next:

lava-multinode: roles: device: count: 2 device_type: xxx

What does "count" mean? I know the job will only be scheduled if there are 2 "xxx" based device idle. But, after that, how I could use one device do one task, and use another device to do another task? How can I assign different tasks to the 2 devices with the same devicetype?

E.g. device xxx1 based on xxx device xxx2 based on xxx Then xxx1 run "ls" while xxx2 run "uname"?