PPS statistics without compensation
These figures display PPS statistics for SmartNICs #1 and #2 in the configuration described in SmartNIC Daisy Chain without compensation for propagation delay, that is, values of TimeSyncTimeOffset is set to 0.
In this figure, the external time synchronization connector of SmartNIC #1 is connected to SmartNIC #0.
In this figure, the external time synchronization connector of SmartNIC #2 is connected to SmartNIC #0.
The difference between the mean offsets is 10 ns, corresponding to the expected propagation delay between SmartNIC #1 and SmartNIC #2.
The offsets are somewhat larger than the calculated propagation delays, but within measurement accuracy.
PPS statistics with compensation
These figures display PPS statistics for SmartNICs #1 and #2 in the configuration described in SmartNIC Daisy Chain with compensation for propagation delay as described in ntservice.ini configuration.
In this figure, the external time synchronization connector of SmartNIC #1 is connected to SmartNIC #0.
In this figure, the external time synchronization connector of SmartNIC #2 is connected to SmartNIC #0.
The difference between the mean offsets is now 0 ns, verifying the effect of setting TimeSyncTimeOffset.
The offset is somewhat larger than the calculated propagation delay, but within measurement accuracy.
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