[justicezyx]

> High-level means not exposing hardware limitations to the application.

This seems counter-intuitive.

Hardware limitations mean different abstraction than OS-level APIs, as them to applications.

Even POSIX does not expose hardware limitations.

Rather, high-level in the paper is more like some suitable interface to a wide range of applications. I.e., high-level as it's targeted to be used directly by applications as a portable interface.

[iyzhang]

I consider POSIX to be high-level. The RDMA and DPDK interface are not.