README
1`perfmon' is a sample program to access the performance-monitoring
2counters on Pentium and Pentium Pro CPUs. See perfmon(4) for a
3description of this facility.
4
5The program takes the following options:
6
7 -u count events in user mode
8 -o count events in kernel mode
9 (these two can be combined)
10
11 -e count events, not duration
12 -l n run `n' loops (default 50)
13 -s n sleep `n' seconds between loop iterations (default 0)
14
15The following options are not implemented on Pentium CPUs:
16
17 -m n use count mask `n'
18 -i invert sense of count mask comparison
19 -U n use unit mask `n'
20
21There is one mandatory argument, which is the event number to be
22monitored, defined in <machine/perfmon.h>. All numbers can be
23specified in any format acceptable to strtol(3).
24
25$FreeBSD$
26