#!/usr/bin/env python
#
#	Simple script to monitor CPU utilization and frequency on FreeBSD.
#   Requires the sysctl wrapper module (sysctl.py).
#

interval = 2	# pause interval in seconds

from time import sleep
from sysctl import *

dev_cpu_0_freq = sysctlnametomib("dev.cpu.0.freq")

dev_cpu_0_freqlevels = sysctlnametomib("dev.cpu.0.freq_levels")
max_freq = max([
	int(pair.split('/')[0])
	for pair in sysctl_str(dev_cpu_0_freqlevels).split()
])

kern_cptime = sysctlnametomib("kern.cp_time")
cptime_1 = sysctl_ulongarray(kern_cptime, 5)

try:
	while True:
		cptime_0 = cptime_1
		sleep (interval)
		cptime_1 = sysctl_ulongarray(kern_cptime, 5)

		cp_diff = [cptime_1[i] - cptime_0[i] for i in range(5)]
		cp_total = sum(cp_diff)
		cp_cpu = cp_total - cp_diff[4]	# Everything except idle time.

		freq = sysctl_int(dev_cpu_0_freq)
		print "cpu: %6.2f%%   freq: %d MHz" % ((100.0 * cp_cpu) / cp_total, freq)
except KeyboardInterrupt:
	pass

#--