How do I get the instantaneous io speed of the docker container?

  docker, question

For example, if container A is started (directory is not mounted), how can I view the io speed of the container on the physical machine?

The docker stats command does not work; the I/O information in its output is the cumulative size, not the speed.

I/O speed should be the same as that of your host computer. If you want to see the I/O status of a container, I mind seeing the I/O status of processes running in that container.