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We wanted to verify whether the sharing created by running on a virtual machine made any significant statistical difference to the PingER results. Thus we compare the results from PinGER running on a bare metal machine (pinger.slac.stanford.edu) vs running on a VM.
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Analysis of measurements from March 10, 2015 16:30 through March 13, 2015 23:45, i.e. approximately 3000 pings, showed a difference (pinger>pingervmfix - pingervmfix>pingert) in minimum RTT of of ~ 0.045 +- 0.02 ms
Logging in
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176cottrell@pinger:~$ssh 172.23.52.7 =============================================================================== NOTICE TO USERS This is a Federal computer system and is the property of the United States ... stated in this warning. =============================================================================== RHEL Server 6.7 (Santiago) 2.6.32-504.16.2.el6.x86_64 (1x2099MHz OpenStack Nova) =============================================================================== WINSTART: Undefined variable. 169cottrell@dhcp-nebula-priv-52-7:~$ |