Set number of workers to allocated cgroup CPUs?

[uhthomas]

Title: Set number of workers to allocated cgroup CPUs?

Description:

I noticed that when running envoy in Kubernetes, it sets the number of workers equal to the number of CPUs on the host, even if there is a limit of just 1 CPU. This may negatively impact performance and it would be nice if envoy could pick this up automatically.

[optional Relevant Links:]

golang/go#33803

#5976

[KBaichoo]

Have you tried using --cpuset-threads option: https://www.envoyproxy.io/docs/envoy/latest/operations/cli#cmdoption-cpuset-threads? If the cgroup creates a cpuset I think it might be picked up from that option.

If not the best way to go about this would probably be wrapping the envoy with --concurrency when launching it. It'd be difficult to change the default behavior at this point.