CPU

WSCPU001

This is the percentage of total elapsed time that the processor was busy executing.  This counter provides a very general measure of how busy the processor is and if this counter is constantly high, say above 90%, then you'll need to use other counters (described below) in order to further determine the root cause of the CPU pressure.

WSCPU002

This is the percentage of total elapsed time that the processor was busy executing.  This counter provides a very general measure of how busy the processor is and if this counter is constantly high, say above 90%, then you'll need to use other counters (described below) in order to further determine the root cause of the CPU pressure.

WSCPU003

The percentage of elapsed time the processor spent executing in user mode.  To describe this simply, it's really the amount of time the processor spent executing any user application code.  Generally, even on a dedicated SQL Server, I like this number to be consistently below 65% as you want to have some buffer for both the kernel operations mentioned above as well as any other bursts of CPU required by other applications.  Anything consistently over 65% should be investigated and this might mean digging deeper into exactly what process is using the CPU (if it's not SQL Server) by using the "[Process] % User time" counter for the individual processes.