Query related to dcping program

[alokprasad]

@rosenbaumalex Program uses API which is for RoCE Timestamping. as per the documentation
https://docs.nvidia.com/networking/display/rdmacore50/roce+time-stamping
it can give multiple timestamp value and have queries on those times.

1. Completion Time -> what is completion time is a time interval between posting and sent over wire ? or its time between posting and other party receiving the packet.
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2. Timestamping on wire- Time-Stamping allows you to stamp packets when they are sent to the wire or when they are received from the wire."

3.Can we use HCA Clock to sync two system with PTP , so that i can calculate time between sent (timestamped packet) and recieved ( timestamped packet) are using same reference