Function startProfiling

flow/Profiler.actor.cpp:271–298

}

void startProfiling(INetwork* network,
                    Optional<int> maybePeriod /*= {}*/,
                    Optional<StringRef> maybeOutputFile /*= {}*/) {
	int period;
	if (maybePeriod.present()) {
		period = maybePeriod.get();
	} else {
		const char* periodEnv = getenv("FLOW_PROFILER_PERIOD");
		period = (periodEnv ? atoi(periodEnv) : 2000);
	}
	std::string outputFile;
	if (maybeOutputFile.present()) {
		outputFile = std::string((const char*)maybeOutputFile.get().begin(), maybeOutputFile.get().size());
	} else {
		const char* outfn = getenv("FLOW_PROFILER_OUTPUT");
		outputFile = (outfn ? outfn : "profile.bin");
	}
	outputFile = findAndReplace(
	    findAndReplace(
	        findAndReplace(outputFile, "%ADDRESS%", findAndReplace(network->getLocalAddress().toString(), ":", ".")),
	        "%PID%",
	        format("%d", getpid())),
	    "%TID%",
	    format("%llx", (long long)sys_gettid()));

	if (!Profiler::active_profiler)
		Profiler::active_profiler = new Profiler(period, outputFile, network);
}

void stopProfiling() {
	if (Profiler::active_profiler) {