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Improve timing tests with averages

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This commit is contained in:
Zach Pomerantz 2016-05-04 12:44:11 -07:00
parent 0f6162d683
commit 3619821b82
1 changed files with 46 additions and 25 deletions

71
interface/src/Util.cpp
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@ -131,63 +131,84 @@ const glm::vec3 randVector() {
// Do some basic timing tests and report the results
void runTimingTests() {
// How long does it take to make a call to get the time?
const int numTests = 1000000;
int* iResults = (int*)malloc(sizeof(int) * numTests);
float fTest = 1.0;
float* fResults = (float*)malloc(sizeof(float) * numTests);
const int numTimingTests = 3;
QElapsedTimer startTime;
float elapsedNSecs;
float elapsedUSecs;
qCDebug(interfaceapp, "numTimingTests: %d", numTimingTests);
startTime.start();
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "QElapsedTimer::nsecElapsed() ns: %f", (double)elapsedNSecs);
qCDebug(interfaceapp, "QElapsedTimer::nsecElapsed() ns: %f", (double)elapsedNSecs / numTimingTests);
// Test sleep functions for accuracy
startTime.start();
QThread::msleep(1);
for (int i = 0; i < numTimingTests; i++) {
QThread::msleep(1);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "QThread::msleep(1) ms: %f", (double)(elapsedNSecs / NSECS_PER_MSEC));
qCDebug(interfaceapp, "QThread::msleep(1) ms: %f", (double)(elapsedNSecs / NSECS_PER_MSEC / numTimingTests));
startTime.start();
QThread::sleep(1);
for (int i = 0; i < numTimingTests; i++) {
QThread::sleep(1);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "QThread::sleep(1) s: %f", (double)(elapsedNSecs / NSECS_PER_MSEC / MSECS_PER_SECOND));
qCDebug(interfaceapp, "QThread::sleep(1) s: %f", (double)(elapsedNSecs / NSECS_PER_MSEC / MSECS_PER_SECOND / numTimingTests));
const int numUsecTests = 1000;
startTime.start();
for (int i = 0; i < numUsecTests; i++) {
usleep(1);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(1) (1000x) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numUsecTests));
startTime.start();
usleep(1);
for (int i = 0; i < numUsecTests; i++) {
usleep(10);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(1) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(10) (1000x) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numUsecTests));
startTime.start();
usleep(10);
for (int i = 0; i < numUsecTests; i++) {
usleep(100);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(10) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(100) (1000x) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numUsecTests));
startTime.start();
usleep(100);
for (int i = 0; i < numTimingTests; i++) {
usleep(1000);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(100) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(1000) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numTimingTests));
startTime.start();
usleep(1000);
for (int i = 0; i < numTimingTests; i++) {
usleep(1001);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(1000) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(1001) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numTimingTests));
startTime.start();
usleep(1500);
for (int i = 0; i < numTimingTests; i++) {
usleep(1500);
}
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(1500) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
startTime.start();
usleep(2500);
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(2500) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(1500) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC / numTimingTests));
startTime.start();
usleep(15000);
elapsedNSecs = (float)startTime.nsecsElapsed();
qCDebug(interfaceapp, "usleep(15000) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
qCDebug(interfaceapp, "usleep(15000) (1x) us: %f", (double)(elapsedNSecs / NSECS_PER_USEC));
const int numTests = 1000000;
int* iResults = (int*)malloc(sizeof(int) * numTests);
float fTest = 1.0;
float* fResults = (float*)malloc(sizeof(float) * numTests);
// Random number generation
startTime.start();