system.cpu.physical.count
system.cpu.logical.count
system.cpu.frequency
system.process.count
system.process.created
system.process.context_switch
system.process.running

process.cpu.time (with cpu.mode attribute for idle, interrupt, iowait,kernel, nice, steal, system, user)
process.cpu.utilization
process.thread.count
process.paging.faults
procss.context.switch (with switch.type as "voluntary" or "involuntary")