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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#ifdef QPID_LATENCY_METRIC
#include "LatencyMetric.h"
#include "Time.h"
#include <iostream>
namespace qpid {
namespace sys {
void LatencyMetricTimestamp::initialize(const LatencyMetricTimestamp& ts) {
const_cast<int64_t&>(ts.latency_metric_timestamp) = Duration(now());
}
void LatencyMetricTimestamp::clear(const LatencyMetricTimestamp& ts) {
const_cast<int64_t&>(ts.latency_metric_timestamp) = 0;
}
LatencyMetric::LatencyMetric(const char* msg, int64_t skip_) :
message(msg), count(0), total(0), skipped(0), skip(skip_)
{}
LatencyMetric::~LatencyMetric() { report(); }
void LatencyMetric::record(const LatencyMetricTimestamp& start) {
if (!start.latency_metric_timestamp) return; // Ignore 0 timestamps.
if (skip) {
if (++skipped < skip) return;
else skipped = 0;
}
++count;
int64_t now_ = Duration(now());
total += now_ - start.latency_metric_timestamp;
// Set start time for next leg of the journey
const_cast<int64_t&>(start.latency_metric_timestamp) = now_;
}
void LatencyMetric::report() {
using namespace std;
if (count) {
cout << "LATENCY: " << message << ": "
<< total / (count * TIME_USEC) << " microseconds" << endl;
}
else {
cout << "LATENCY: " << message << ": no data." << endl;
}
count = 0;
total = 0;
}
}} // namespace qpid::sys
#endif
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