On 30.07.2024 15:40, Tariq Toukan wrote:

From: Rahul Rameshbabu <rrameshbabu@nvidia.com>

Expose Precision Time Measurement support through related PTP ioctl.

The performance of PTM on ConnectX-7 was evaluated using both real-time
(RTC) and free-running (FRC) clocks under traffic and no traffic
conditions. Tests with phc2sys measured the maximum offset values at a 50Hz
rate, with and without PTM. 

Results:

1. No traffic
+-----+--------+--------+
|     | No-PTM | PTM    |
+-----+--------+--------+
| FRC | 125 ns | <29 ns |
+-----+--------+--------+
| RTC | 248 ns | <34 ns |
+-----+--------+--------+

2. With traffic
+-----+--------+--------+
|     | No-PTM | PTM    |
+-----+--------+--------+
| FRC | 254 ns | <40 ns |
+-----+--------+--------+
| RTC | 255 ns | <45 ns |
+-----+--------+--------+

Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Co-developed-by: Carolina Jubran <redacted>
Signed-off-by: Carolina Jubran <redacted>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---

Reviewed-by: Wojciech Drewek <redacted>

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