run_driver.py 文件源码

def _instancecheck_impl(self, value, info: Info = NoInfo()):
        if not isinstance(value, List(Str())):
            return info.errormsg(self)
        if not is_perf_available():
            return info.wrap(True)
        assert isinstance(value, list)
        if "wall-clock" in value:
            value = value.copy()
            value.remove("wall-clock")
        cmd = "perf stat -x ';' -e {props} -- /bin/echo".format(props=",".join(value))
        proc = subprocess.Popen(["/bin/sh", "-c", cmd], stdout=subprocess.DEVNULL,
                                stderr=subprocess.PIPE, universal_newlines=True)
        out, err = proc.communicate()
        if proc.poll() > 0:
            return info.errormsg(self, "Not a valid properties list: " + str(err).split("\n")[0].strip())
        return info.wrap(True)