Are there any proposals to make the golang runtime cgroup aware? Last time I checked the go runtime will spawn a OS process for each cpu it can see even if it is running in a cgroup which only allows 1 CPU of usage.
On servers with 100+ cores I have seen scheduling time take over 10% of the program runtime.
The fix is to inspect the cgroupfs to see how many CPU shares you can utilize and then set gomaxprocs to match that. I think other runtime like Java and .NET do this automatically.
It is the same thing with GOMEMLIMIT, I don’t see why the runtime does not inspect cgroupfs and set GOMEMLIMIT to 90% of the cgroup memory limit.
The fix is to inspect the cgroupfs to see how many CPU shares you can utilize and then set gomaxprocs to match that. I think other runtime like Java and .NET do this automatically.
It is the same thing with GOMEMLIMIT, I don’t see why the runtime does not inspect cgroupfs and set GOMEMLIMIT to 90% of the cgroup memory limit.