Method writeToLog

flow/Histogram.cpp:91–138

	                                                  "percentage",   "count", "none" };

void Histogram::writeToLog(double elapsed) {
	bool active = false;
	for (uint32_t i = 0; i < 32; i++) {
		if (buckets[i]) {
			active = true;
			break;
		}
	}
	if (!active) {
		return;
	}

	TraceEvent e(SevInfo, "Histogram");
	e.detail("Group", group).detail("Op", op).detail("Unit", UnitToStringMapper[(size_t)unit]);
	if (elapsed > 0)
		e.detail("Elapsed", elapsed);
	int totalCount = 0;
	for (uint32_t i = 0; i < 32; i++) {
		uint64_t value = uint64_t(1) << (i + 1);

		if (buckets[i]) {
			totalCount += buckets[i];
			switch (unit) {
			case Unit::microseconds:
				e.detail(format("LessThan%u.%03u", int(value / 1000), int(value % 1000)), buckets[i]);
				break;
			case Unit::bytes:
			case Unit::bytes_per_second:
				e.detail(format("LessThan%" PRIu64, value), buckets[i]);
				break;
			case Unit::percentageLinear:
				e.detail(format("LessThan%f", (i + 1) * 0.04), buckets[i]);
				break;
			case Unit::countLinear:
				value = uint64_t((i + 1) * ((upperBound - lowerBound) / 31.0));
				e.detail(format("LessThan%" PRIu64, value), buckets[i]);
				break;
			case Unit::MAXHISTOGRAMUNIT:
				e.detail(format("Default%u", i), buckets[i]);
				break;
			default:
				ASSERT(false);
			}
		}
	}
	e.detail("TotalCount", totalCount);
	clear();
}

std::string Histogram::drawHistogram() {