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93 lines
1.9 KiB
C++
93 lines
1.9 KiB
C++
#ifndef LOADMONITOR__H_
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#define LOADMONITOR__H_
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#include <string>
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#include <boost/thread/mutex.hpp>
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#include <boost/shared_ptr.hpp>
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#include "types.h"
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// Monitors load levels and response times
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class LoadMonitor
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{
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protected:
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uint64 mCounts;
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uint64 mLatencyEvents;
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uint64 mLatencyMSAvg;
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uint64 mLatencyMSPeak;
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uint64 mTargetLatencyAvg;
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uint64 mTargetLatencyPk;
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time_t mLastUpdate;
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boost::mutex mLock;
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void update();
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public:
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LoadMonitor() : mCounts(0), mLatencyEvents(0), mLatencyMSAvg(0), mLatencyMSPeak(0),
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mTargetLatencyAvg(0), mTargetLatencyPk(0)
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{ mLastUpdate = time(NULL); }
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void addCount(int counts);
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void addLatency(int latency);
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void addCountAndLatency(int counts, int latency);
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void setTargetLatency(uint64 avg, uint64 pk)
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{
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mTargetLatencyAvg = avg * 4;
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mTargetLatencyPk = pk * 4;
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}
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bool isOverTarget(uint64 avg, uint64 peak)
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{
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return (mTargetLatencyPk && (peak > mTargetLatencyPk)) ||
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(mTargetLatencyAvg && (avg > mTargetLatencyAvg));
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}
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void getCountAndLatency(uint64& count, uint64& latencyAvg, uint64& latencyPeak, bool& isOver);
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};
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class LoadEvent
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{
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public:
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typedef boost::shared_ptr<LoadEvent> pointer;
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typedef std::auto_ptr<LoadEvent> autoptr;
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protected:
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LoadMonitor& mMonitor;
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bool mRunning;
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int mCount;
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boost::posix_time::ptime mStartTime;
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public:
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LoadEvent(LoadMonitor& monitor, bool shouldStart, int count) : mMonitor(monitor), mRunning(false), mCount(count)
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{
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mStartTime = boost::posix_time::microsec_clock::universal_time();
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if (shouldStart)
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start();
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}
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~LoadEvent()
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{
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if (mRunning)
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stop();
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}
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void start()
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{ // okay to call if already started
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mRunning = true;
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mStartTime = boost::posix_time::microsec_clock::universal_time();
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}
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void stop()
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{
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assert(mRunning);
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mRunning = false;
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mMonitor.addCountAndLatency(mCount,
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static_cast<int>((boost::posix_time::microsec_clock::universal_time() - mStartTime).total_milliseconds()));
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}
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};
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#endif
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