[RFC v3 0/3] add frequency adjustment support for PTP timesync

[Simei Su]

This patchset cover below parts:
(1)Introduce a new timesync API called "rte_eth_timesync_adjust_freq" that
   enables frequency adjustment during PTP timesync. This new API aligns with
   the kernel PTP which already supports frequency adjustment. It brings DPDK
   closer in alignment with the kernel's best practice.

(2)Refine the ptpclient application by applying a PI algorithm that leverages
   the new API to further improve timesync accuracy. These changes doesn't break
   original solution and creates a more accurate solution for DPDK-based high
   accuracy PTP. We have provided significant improvements for timesync accuracy
   on e810 and we believe these improvements will also benefit other devices.

The original command for starting ptpclient is:
./build/examples/dpdk-ptpclient -a 0000:81:00.0 -c 1 -n 3 -- -T 0 -p 0x1

The command with PI algorithm is:
./build/examples/dpdk-ptpclient -a 0000:81:00.0 -c 1 -n 3 -- -T 0 -p 0x1 -- controller=pi

[RFC v3 1/3] ethdev: add frequency adjustment API.
[RFC v3 2/3] examples/ptpclient: refine application.
[RFC v3 3/3] examples/ptpclient: add frequency adjustment support.

v3:
* Refine commit log in patch.
* Add more description for the new API.

v2:
* Remove the ice PMD part from the RFC.
* Add description in cover letter.
* Refine commit log in patch.

Simei Su (3):
  ethdev: add frequency adjustment API
  examples/ptpclient: refine application
  examples/ptpclient: add frequency adjustment support

 examples/ptpclient/ptpclient.c   | 222 +++++++++++++++++++++++++++++++++------
 lib/ethdev/ethdev_driver.h       |   5 +
 lib/ethdev/ethdev_trace.h        |   9 ++
 lib/ethdev/ethdev_trace_points.c |   3 +
 lib/ethdev/rte_ethdev.c          |  19 ++++
 lib/ethdev/rte_ethdev.h          |  38 +++++++
 6 files changed, 265 insertions(+), 31 deletions(-)

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2.9.5