By default, the 'top'top command will display Cygwin processes by CPU usage.
If you'd like to view only Windows processes, you can use the 'ps'ps command, and then sort your results by CPU usage:
ps -W | sort -nk 3
where:
-W refers to Windows processes,
-n refers to a numerical sort, and
-k refers to a key, in this case the 3rd column of output from ps.