import shutil
import subprocess

cmd = "perf record -e cycles:u -o /dev/null {} -- perf --version"
cmd_basic = cmd.format("").split()
cmd_brstack = cmd.format("-j any,u").split()

if shutil.which("perf") is not None:
  if subprocess.run(cmd_basic, capture_output=True).returncode == 0:
    config.available_features.add("perf")
  if subprocess.run(cmd_brstack, capture_output=True).returncode == 0:
    config.available_features.add("perf-brstack")