void RunProfiling(int iterations, unsigned int uiWorkgroup)
{
// once without timing to prime the GPU
nbody->update(activeParams.m_timestep);
nbody->synchronizeThreads();
// Start timer 0 and process n loops on the GPU
shrDeltaT(FUNCTIME);
for (int i = 0; i < iterations; ++i)
{
nbody->update(activeParams.m_timestep);
}
nbody->synchronizeThreads();
// Get elapsed time and throughput, then log to sample and master logs
double dSeconds = shrDeltaT(FUNCTIME);
double dGigaInteractionsPerSecond = 0.0;
double dGigaFlops = 0.0;
ComputePerfStats(dGigaInteractionsPerSecond, dGigaFlops, dSeconds, iterations);
shrLogEx(LOGBOTH | MASTER, 0, "oclNBody-%s, Throughput = %.4f GFLOP/s, Time = %.5f s, Size = %u bodies, NumDevsUsed = %u, Workgroup = %u\n",
(bDouble ? "DP" : "SP"), dGigaFlops, dSeconds/(double)iterations, numBodies, uiNumDevsUsed, uiWorkgroup);
}
// Primary GLUT callback loop function
//*****************************************************************************
void DisplayGL()
{
// update the simulation, unless paused
double dProcessingTime = 0.0;
if (!bPause)
{
// start timer FUNCTIME if it's update time
if (iFrameCount >= iFrameTrigger)
{
shrDeltaT(FUNCTIME);
}
// Run the simlation computations
nbody->update(activeParams.m_timestep);
nbody->getArray(BodySystem::BODYSYSTEM_POSITION);
// Make graphics work with or without CL/GL interop
if (bUsePBO)
{
renderer->setPBO((unsigned int)nbody->getCurrentReadBuffer(), nbody->getNumBodies());
}
else
{
renderer->setPositions((float*)nbody->getCurrentReadBuffer(), nbody->getNumBodies());
}
// get processing time from timer FUNCTIME, if it's update time
if (iFrameCount >= iFrameTrigger)
{
dProcessingTime = shrDeltaT(FUNCTIME);
}
}
// Redraw main graphics display, if enabled
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (displayEnabled)
{
// view transform
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
for (int c = 0; c < 3; ++c)
{
camera_trans_lag[c] += (camera_trans[c] - camera_trans_lag[c]) * inertia;
camera_rot_lag[c] += (camera_rot[c] - camera_rot_lag[c]) * inertia;
}
glTranslatef(camera_trans_lag[0], camera_trans_lag[1], camera_trans_lag[2]);
glRotatef(camera_rot_lag[0], 1.0, 0.0, 0.0);
glRotatef(camera_rot_lag[1], 0.0, 1.0, 0.0);
renderer->setSpriteSize(activeParams.m_pointSize);
renderer->display(displayMode);
}
// Display user interface if enabled
if (bShowSliders)
{
glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ZERO); // invert color
glEnable(GL_BLEND);
paramlist->Render(0, 0);
glDisable(GL_BLEND);
}
// Flip backbuffer to screen
glutSwapBuffers();
// If frame count has triggerd, increment the frame counter, and do fps stuff
if (iFrameCount++ > iFrameTrigger)
{
// If tour mode is enabled & interval has timed out, switch to next tour/demo mode
dElapsedTime += shrDeltaT(DEMOTIME);
if (bTour && (dElapsedTime > demoTime))
{
dElapsedTime = 0.0;
activeDemo = (activeDemo + 1) % numDemos;
SelectDemo(activeDemo);
}
// get the perf and fps stats
iFramesPerSec = (int)((double)iFrameCount/ shrDeltaT(FPSTIME));
double dGigaInteractionsPerSecond = 0.0;
double dGigaFlops = 0.0;
ComputePerfStats(dGigaInteractionsPerSecond, dGigaFlops, dProcessingTime, 1);
// If not paused, set the display window title, reset trigger and log info
char cTitle[256];
if(!bPause)
{
#ifdef GPU_PROFILING
#ifdef _WIN32
sprintf_s(cTitle,
"OpenCL for GPU Nbody Demo (%d bodies): %i fps | %0.4f BIPS | %0.4f GFLOP/s",
numBodies, iFramesPerSec, dGigaInteractionsPerSecond, dGigaFlops);
#else
sprintf(cTitle,
"OpenCL for GPU Nbody Demo (%d bodies): %i fps | %0.4f BIPS | %0.4f GFLOP/s",
numBodies, iFramesPerSec, dGigaInteractionsPerSecond, dGigaFlops);
#endif
#else
#ifdef _WIN32
sprintf_s(cTitle,
"OpenCL for GPU Nbody Demo (%d bodies)",
numBodies, iFramesPerSec, dGigaInteractionsPerSecond);
#else
sprintf(cTitle,
"OpenCL for GPU Nbody Demo (%d bodies)",
numBodies, iFramesPerSec, dGigaInteractionsPerSecond);
#endif
#endif
#ifndef __EMSCRIPTEN__
glutSetWindowTitle(cTitle);
#else
printf("%s\n",cTitle);
#endif
// Log fps and processing info to console and file
shrLog("%s\n", cTitle);
// if doing quick test, exit
if ((bNoPrompt) && (!--iTestSets))
{
// Cleanup up and quit
shrQAFinish2(false, *pArgc, (const char **)pArgv, QA_PASSED);
Cleanup(EXIT_SUCCESS);
}
// reset the frame counter and adjust trigger
iFrameCount = 0;
iFrameTrigger = (iFramesPerSec > 1) ? iFramesPerSec * 2 : 1;
}
}
#ifndef __EMSCRIPTEN__
glutReportErrors();
#endif
}