Runner is a thin library that's able to precisely measure on-CPU time for goroutines. It relies on a slightly modified Go runtime for additional instrumentation in order to function. It's a prototype for what finer-grained CPU attribution could look like in Go.
The repo includes the necessary Go runtime as a submodule. To get up and
running (assumes you already have go installed and in your PATH):
$ git clone git@github.com:irfansharif/runner.git
$ cd runner
$ make go # optional; set up submodules and build the modified go runtimeWe can now use the modified Go to run tests:
$ modules/go/bin/go test -v .Alternatively, you can develop using bazel (which already points to mirrored Go SDK's containing the modified runtime changes for darwin, linux and freebsd). For unsupported OS/architectures, build the submoduled go as described above and point bazel to it using the following:
go_local_sdk(
name = "go_sdk",
path = "<path to checkout>/modules/go",
)Finally, run the package tests/benchmarks or update BUILD files:
$ make test
$ make bench
$ make generate