/** Test that ST and MT yield the exact same result */
public void testMTEquals() {
int size1 = 10;
int size2 = 15;
byte state1 = Grid.INSIDE;
byte state2 = Grid.INSIDE;
Grid grid1 = new ArrayGridByte(size1, size1, size1, 0.001, 0.001);
Grid grid2 = new ArrayGridByte(size2, size2, size2, 0.002, 0.002);
Grid grid3 = new ArrayGridByte(size2, size2, size2, 0.002, 0.002);
// set grid1
for (int x = 3; x < 7; x++) {
grid1.setState(x, 5, 5, state1);
}
// set grid2
for (int y = 5; y < size2; y++) {
grid2.setState(1, y, 10, state2);
}
// set grid3
for (int y = 5; y < size2; y++) {
grid3.setState(1, y, 10, state2);
}
// get the subtraction of grid1 from grid2
SubtractOpMT op = new SubtractOpMT(grid1, Runtime.getRuntime().availableProcessors());
Grid subtrGridMT = op.execute(grid2);
SubtractOp op2 = new SubtractOp(grid1, 0, 0, 0, 1);
Grid subtrGridST = op2.execute(grid2);
assertEquals(size2, subtrGridST.getWidth());
assertEquals(size2, subtrGridMT.getWidth());
// check filled voxel state and material
for (int x = 0; x < size2; x++) {
for (int y = 0; y < size2; y++) {
for (int z = 0; z < size2; z++) {
assertEquals(
"(" + x + ", " + y + ", " + z + ") state is not equal",
subtrGridST.getState(x, y, z),
subtrGridMT.getState(x, y, z));
}
}
}
}
/** Grids sharing a voxel coordinate should have those voxels subtracted */
public void _testSharedVoxelMT() {
int size1 = 10;
int size2 = 15;
byte state1 = Grid.INSIDE;
byte state2 = Grid.INSIDE;
Grid grid1 = new ArrayGridByte(size1, size1, size1, 0.001, 0.001);
Grid grid2 = new ArrayGridByte(size2, size2, size2, 0.002, 0.002);
// set grid1
for (int x = 3; x < 7; x++) {
grid1.setState(x, 5, 5, state1);
}
// set grid2
for (int y = 5; y < size2; y++) {
grid2.setState(3, y, 5, state2);
}
// get the subtration of grid1 from grid2
SubtractOpMT op = new SubtractOpMT(grid1, Runtime.getRuntime().availableProcessors());
Grid subtrGrid = (Grid) op.execute(grid2);
assertEquals(size2, subtrGrid.getWidth());
// check filled voxel state and material
for (int x = 0; x < size2; x++) {
for (int y = 0; y < size2; y++) {
for (int z = 0; z < size2; z++) {
if (x == 3 && y >= 6 && y < size2 && z == 5) {
assertEquals(
"(" + x + ", " + y + ", " + z + ") state is not " + state2,
state2,
subtrGrid.getState(x, y, z));
} else {
assertEquals(
"(" + x + ", " + y + ", " + z + ") state is not outside",
Grid.OUTSIDE,
subtrGrid.getState(x, y, z));
}
}
}
}
}
/** Test that MT is faster then ST. Assumes we always run on a MT box */
public void _testMTFaster() {
// TODO: this test does not always works so removing for now
int size1 = 800;
int size2 = 800;
byte state1 = Grid.INSIDE;
byte state2 = Grid.INSIDE;
Grid grid1 = new ArrayGridByte(size1, size1, size1, 0.001, 0.001);
Grid grid2 = new ArrayGridByte(size2, size2, size2, 0.002, 0.002);
Grid grid3 = new ArrayGridByte(size2, size2, size2, 0.002, 0.002);
for (int y = 0; y < grid1.getHeight(); y++) {
for (int x = 0; x < grid1.getWidth(); x++) {
for (int z = 0; z < grid1.getDepth(); z++) {
grid1.setState(x, y, z, state1);
}
}
}
for (int y = 0; y < grid2.getHeight(); y++) {
for (int x = 0; x < grid2.getWidth(); x++) {
for (int z = 0; z < grid2.getDepth(); z++) {
grid2.setState(x, y, z, state1);
}
}
}
int WARMUP = 3;
long st_time = 0;
for (int i = 0; i < WARMUP; i++) {
long t0 = System.currentTimeMillis();
// get the subtraction of grid1 from grid2
SubtractOpMT op = new SubtractOpMT(grid1, Runtime.getRuntime().availableProcessors());
Grid subtrGridMT = op.execute(grid2);
long mt_time = System.currentTimeMillis() - t0;
t0 = System.currentTimeMillis();
SubtractOp op2 = new SubtractOp(grid1, 0, 0, 0, 1);
Grid subtrGridST = op2.execute(grid2);
st_time = System.currentTimeMillis() - t0;
// printf("MT time: %6d ST time: %6d SpeedUp: %6.2f\n",mt_time,st_time,(float)st_time /
// mt_time);
}
int TIMES = 1;
int cores = Runtime.getRuntime().availableProcessors();
cores = Math.min(cores, 16); // We expect linear scaling to stop by this time
float expected_speedup = 0.5f * cores;
for (int i = 0; i < TIMES; i++) {
long t0 = System.currentTimeMillis();
// get the subtraction of grid1 from grid2
SubtractOpMT op = new SubtractOpMT(grid1, Runtime.getRuntime().availableProcessors());
op.setThreadCount(cores);
op.setSliceSize(2);
Grid subtrGridMT = op.execute(grid2);
if (subtrGridMT.getWidth() > 10000) {
System.out.println("no optimize away");
}
;
long mt_time = System.currentTimeMillis() - t0;
float speedup = (float) st_time / mt_time;
printf("MT time: %6d ST time: %6d SpeedUp: %6.2f\n", mt_time, st_time, speedup);
assertTrue("Speedup factor > " + expected_speedup, speedup >= expected_speedup);
}
}