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/*
* Copyright information and license terms for this software can be
* found in the file LICENSE that is included with the distribution
*/
/**
* @author mrk
* @date 2013.09.02
*/
/* Author: Marty Kraimer */
#include <cstddef>
#include <cstdlib>
#include <cstddef>
#include <string>
#include <cstdio>
#include <memory>
#include <iostream>
#include <vector>
#include <epicsThread.h>
#include <pv/timeStamp.h>
#include <pv/lock.h>
typedef std::tr1::shared_ptr<epicsThread> EpicsThreadPtr;
using namespace std;
using std::tr1::static_pointer_cast;
using namespace epics::pvData;
class VectorPerformanceThread;
typedef std::tr1::shared_ptr<VectorPerformanceThread> VectorPerformanceThreadPtr;
class VectorPerformanceThread :
public epicsThreadRunable
{
public:
VectorPerformanceThread(int threadNumber,size_t size,double delay);
virtual ~VectorPerformanceThread(){};
void init();
void start();
virtual void run();
void destroy();
private:
bool isDestroyed;
bool runReturned;
int threadNumber;
size_t size;
epics::pvData::int64 value;
double delay;
Mutex mutex;
std::vector<int64> vector;
EpicsThreadPtr thread;
};
VectorPerformanceThread::VectorPerformanceThread(
int threadNumber,size_t size,double delay)
:
isDestroyed(false),
runReturned(false),
threadNumber(threadNumber),
size(size),
value(0),
delay(delay)
{}
void VectorPerformanceThread::init()
{
vector.resize(size);
thread = EpicsThreadPtr(new epicsThread(
*this,
"vectorPerform",
epicsThreadGetStackSize(epicsThreadStackSmall),
epicsThreadPriorityHigh));
}
void VectorPerformanceThread::start()
{
thread->start();
}
void VectorPerformanceThread::destroy()
{
Lock lock(mutex);
if(isDestroyed) return;
isDestroyed = true;
while(true) {
if(runReturned) break;
lock.unlock();
epicsThreadSleep(.01);
lock.lock();
}
thread->exitWait();
thread.reset();
}
void VectorPerformanceThread::run()
{
TimeStamp timeStamp;
TimeStamp timeStampLast;
timeStampLast.getCurrent();
int nSinceLastReport = 0;
while(true) {
if(delay>0.0) epicsThreadSleep(delay);
{
Lock lock(mutex);
if(isDestroyed) {
runReturned = true;
return;
}
}
timeStamp.getCurrent();
double diff = TimeStamp::diff(timeStamp,timeStampLast);
if(diff>=1.0) {
cout << "thread" << threadNumber;
cout << " value " << value;
cout << " time " << diff;
double iterations = nSinceLastReport;
iterations /= diff;
cout << " iterations/sec " << iterations;
double elementSize = size;
double elementsPerSecond = elementSize*nSinceLastReport;
elementsPerSecond /= diff;
elementsPerSecond /= 1e6;
cout << " elements/sec " << elementsPerSecond << "million" << endl;
cout.flush();
timeStampLast = timeStamp;
nSinceLastReport = 0;
}
++nSinceLastReport;
++value;
for(size_t i=0; i<size; ++i) vector[i] = value;
}
}
int main(int argc,char *argv[])
{
size_t size = 50000000;
double delay = .01;
size_t nThread = 1;
if(argc==2 && string(argv[1])==string("-help")) {
cout << "vectorPerformanceMain size delay nThread" << endl;
cout << "default" << endl;
cout << "vectorPerformance ";
cout << size << " ";
cout << delay << " ";
cout << nThread << " ";
cout << endl;
return 0;
}
if(argc>1) size = strtoul(argv[1],0,0);
if(argc>2) delay = atof(argv[2]);
if(argc>3) nThread = strtoul(argv[3],0,0);
cout << "vectorPerformance ";
cout << size << " ";
cout << delay << " ";
cout << nThread << " ";
cout << endl;
cout << "vectorPerformance\n";
std::vector<VectorPerformanceThreadPtr> threads;
for(size_t i=0; i<nThread; ++i) {
threads.push_back(
VectorPerformanceThreadPtr(
new VectorPerformanceThread(i,size,delay)));
}
epicsThreadSleep(.1);
for(size_t i=0; i<nThread; ++i) {
threads[i]->init();
}
for(size_t i=0; i<nThread; ++i) {
threads[i]->start();
}
string str;
while(true) {
cout << "Type exit to stop: \n";
getline(cin,str);
if(str.compare("exit")==0) break;
}
for(size_t i=0; i<nThread; ++i) {
threads[i]->destroy();
}
return 0;
}