This patch conditionalizes some output from perfc_printall(), thus making relevant...

This patch conditionalizes some output from perfc_printall(), thus making relevant information more compact and easier
legible. It additionally changes the formatting so that trailing spaces are avoided.

Also changing the type of some variables from plain int to unsigned int, as that is yielding more efficient code on
x86-64 (signed 32-bit array indices require explicit sign extension, whereas in most cases an extra copy can be avoided
when the index type is unsigned, since all 32-bit operations already zero-extend their results).

Signed-off-by: Jan Beulich <jbeulich@novell.com>