In this section
This section contains the delay compensation calculations for the system configuration in SmartNIC Daisy Chain.
Assumptions
These assumptions are made for the system configuration:
- SmartNIC #1: NT20E3-2-PTP
- SmartNIC #2: NT20E3-2-PTP
- SmartNIC #3: NT20E3-2-PTP
- Cable lengths for all cables: 0.2 m
Signal delay for SmartNIC #2
The signal delay for SmartNIC #2 consists of these contributions:
- TS_Out_Delay (SmartNIC #1, NT20E3-2-PTP)
- Cable_Delay (0.2 m)
- TS_In_Delay (SmartNIC #2, NT20E3-2-PTP)
Total signal delay in ns: 8 + 0.2 × 5 + 6 = 15
ntservice.ini code line: TimeSyncTimeOffset = 15
Signal delay for SmartNIC #3
The signal delay for SmartNIC #3 consists of these contributions:
- TS_Out_Delay (SmartNIC #1, NT20E3-2-PTP)
- Cable_Delay (0.2 m)
- Daisy_Chain_Delay (SmartNIC #2, NT20E3-2-PTP)
- Cable_Delay (0.2 m)
- TS_In_Delay (SmartNIC #3, NT20E3-2-PTP)
Total signal delay in ns: 8 + 0.2 × 5 + 14 + 0.2 × 5 + 6 = 30
ntservice.ini code line: TimeSyncTimeOffset = 30