Example #1
0
void PerfDriver::setupCounter(Counter &counter) {
	PerfCounter *const perfCounter = findCounter(counter);
	if (perfCounter == NULL) {
		counter.setEnabled(false);
		return;
	}

	// Don't use the config from counters XML if it's not set, ex: software counters
	if (counter.getEvent() != -1) {
		perfCounter->setConfig(counter.getEvent());
	}
	perfCounter->setCount(counter.getCount());
	perfCounter->setEnabled(true);
	counter.setKey(perfCounter->getKey());
}
void KMod::setupCounter(Counter &counter) {
	char base[128];
	char text[128];
	snprintf(base, sizeof(base), "/dev/gator/events/%s", counter.getType());

	snprintf(text, sizeof(text), "%s/enabled", base);
	int enabled = true;
	if (Collector::writeReadDriver(text, &enabled) || !enabled) {
		counter.setEnabled(false);
		return;
	}

	snprintf(text, sizeof(text), "%s/key", base);
	int key = 0;
	Collector::readIntDriver(text, &key);
	counter.setKey(key);

	snprintf(text, sizeof(text), "%s/event", base);
	Collector::writeDriver(text, counter.getEvent());
	snprintf(text, sizeof(text), "%s/count", base);
	if (access(text, F_OK) == 0) {
		int count = counter.getCount();
		if (Collector::writeReadDriver(text, &count) && counter.getCount() > 0) {
			logg->logError(__FILE__, __LINE__, "Cannot enable EBS for %s:%i with a count of %d\n", counter.getType(), counter.getEvent(), counter.getCount());
			handleException();
		}
		counter.setCount(count);
	} else if (counter.getCount() > 0) {
		logg->logError(__FILE__, __LINE__, "Event Based Sampling is only supported with kernel versions 3.0.0 and higher with CONFIG_PERF_EVENTS=y, and CONFIG_HW_PERF_EVENTS=y\n");
		handleException();
	}
}
Example #3
0
void KMod::setupCounter(Counter &counter) {
	char base[128];
	char text[128];
	snprintf(base, sizeof(base), "/dev/gator/events/%s", counter.getType());

	snprintf(text, sizeof(text), "%s/enabled", base);
	int enabled = true;
	if (DriverSource::writeReadDriver(text, &enabled) || !enabled) {
		counter.setEnabled(false);
		return;
	}

	int value = 0;
	snprintf(text, sizeof(text), "%s/key", base);
	DriverSource::readIntDriver(text, &value);
	counter.setKey(value);

	snprintf(text, sizeof(text), "%s/cores", base);
	if (DriverSource::readIntDriver(text, &value) == 0) {
		counter.setCores(value);
	}

	snprintf(text, sizeof(text), "%s/event", base);
	DriverSource::writeDriver(text, counter.getEvent());
	snprintf(text, sizeof(text), "%s/count", base);
	if (access(text, F_OK) == 0) {
		int count = counter.getCount();
		if (DriverSource::writeReadDriver(text, &count) && counter.getCount() > 0) {
			logg->logError(__FILE__, __LINE__, "Cannot enable EBS for %s:%i with a count of %d\n", counter.getType(), counter.getEvent(), counter.getCount());
			handleException();
		}
		counter.setCount(count);
	} else if (counter.getCount() > 0) {
		ConfigurationXML::remove();
		logg->logError(__FILE__, __LINE__, "Event Based Sampling is only supported with kernel versions 3.0.0 and higher with CONFIG_PERF_EVENTS=y, and CONFIG_HW_PERF_EVENTS=y. The invalid configuration.xml has been removed.\n");
		handleException();
	}
}