CPU Load question

  • I'm trying to determine how much CPU my OpenVPN connection is really using.  When I fully saturate the 85Mbps connection my CPU load (from the System Information GUI) fluctuates between 15-22%.  However, I believe OpenVPN is singled threaded so since my CPU is quad core does that mean that one core is near 100% and that I'm pretty much at the max VPN speed for my CPU (c2558)?

    This is what my System Activity looks like during a file transfer that saturates the VPN connection but I'm not quite sure how to read it.

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