irq_affinity should report top results

[AustinSchuh]

This would be incredibly handy to be able to debug what is happening when something goes wrong to see what else is happening in the system. 1hz is plenty (as we dredge through /proc to see how things are going), or lower frequency when we are dredging through.

We should also put the scheduler + affinity + priority in that report too, along with memory usage.