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ENA will likely also be effective for new instance types that are released in the future. However, it will not likely be extended to older instance types.
PTP hadware clock seems to be available only for R7g in Tokyo region according to the documentation. Are you using it on R7g family in Tokyo region?
The PTP hardware clock is available on an instance when the following requirements are met:
- Supported AWS Region: Asia Pacific (Tokyo)
- Supported instance family: R7g
- ENA driver version 2.10.0 or later installed on a supported operating system. For more information about supported operating systems, see the driver prerequisites on GitHub.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/set-time.html
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