Adds port counter metrics to RDMA health-checks. On EFA, rdma_write_bytes and rdma_write_recv_bytes store the total # of transmitted and received bytes respectively. On GCP/OCI, port_xmit_data and port_rcv_data are the counters for transmitted and received words. We multiply by 4 to convert these to bytes then print out the deltas from before and after the bw tests execute.

I also added a simple printout of the cloud provider in modal_bw_ib.py.

Checklist

• [*] Example is documented with comments throughout, in a Literate Programming style.
• [*] Example does not require third-party dependencies to be installed locally
• [*] Example follows the style guide
• [*] Example pins its dependencies
  • [*] Example pins container images to a stable tag, not a dynamic tag like latest
  • [*] Example specifies a python_version for the base image, if it is used
  • [*] Example pins all dependencies to at least minor version, ~=x.y.z or ==x.y
  • [*] Example dependencies with version < 1 are pinned to patch version, ==0.y.z

(Modal's internal guide page for this repo is Multi-node examples guidance.)

Outside contributors

You're great! Thanks for your contribution.