Monitor System Power Draw with IPMI

How to monitor system power statistics using IPMI without a power meter.

[root@1028QG ~]#yum install freeipmi
#
[root@1028QG ~]#ipmi-dcmi --get-system-power-statistics

Sample output below:

[root@1028QG ~]#watch ipmi-dcmi --get-system-power-statistics

Every 2.0s: ipmi-dcmi --get-system-power-statistics                                              Fri Nov 20 22:07:38 2015

Current Power                        : 367 Watts
Minimum Power over sampling duration : 153 watts
Maximum Power over sampling duration : 1788 watts
Average Power over sampling duration : 499 watts
Time Stamp                           : 11/20/2015 - 22:07:39
Statistics reporting time period     : 39748000 milliseconds
Power Measurement                    : Active