private static void benchDouble(ArrayFile af, int n) throws IOException {
double[] a = randdouble(n);
double[] b = zerodouble(n);
int nio;
Stopwatch sw = new Stopwatch();
sw.start();
for (nio = 0; sw.time() < 5.0; ++nio) {
af.seek(0);
af.writeDoubles(a);
af.seek(0);
af.readDoubles(b);
}
sw.stop();
for (int i = 0; i < n; ++i) if (a[i] != b[i]) throw new RuntimeException("double: i/o failure");
double time = sw.time();
double rate = 2.0 * 8.0e-6 * nio * n / time;
System.out.println("double: rate=" + rate + " MB/s");
}
/**
* Transforms the specified array of times and marks. Known samples are those for which times are
* zero, and times and marks for these known samples are used to compute times and marks for
* unknown samples.
*
* @param times input/output array of times.
* @param marks input/output array of marks.
*/
public void apply(float[][][] times, int[][][] marks) {
// Measure elapsed time in seconds.
Stopwatch sw = new Stopwatch();
sw.start();
log.fine("TimeMarker3.apply: begin time=" + (int) sw.time());
// Initialize all unknown times to infinity.
for (int i3 = 0; i3 < _n3; ++i3) {
for (int i2 = 0; i2 < _n2; ++i2) {
for (int i1 = 0; i1 < _n1; ++i1) {
if (times[i3][i2][i1] != 0.0f) times[i3][i2][i1] = INFINITY;
}
}
}
// Indices of known samples in random order.
short[][] kk = indexKnownSamples(times);
short[] k1 = kk[0];
short[] k2 = kk[1];
short[] k3 = kk[2];
shuffle(k1, k2, k3);
int nk = k1.length;
// Array for the eikonal solution times.
float[][][] t = new float[_n3][_n2][_n1];
// Active list of samples used to compute times.
ActiveList al = new ActiveList();
// For all known samples, ...
for (int ik = 0; ik < nk; ++ik) {
if (ik % (1 + (nk - 1) / 100) == 0)
log.fine(" apply: ik/nk=" + ik + "/" + nk + " time=" + (int) sw.time());
int i1 = k1[ik];
int i2 = k2[ik];
int i3 = k3[ik];
// Clear activated flags so we can tell which samples become activated.
clearActivated();
// Put the known sample with time zero into the active list.
t[i3][i2][i1] = 0.0f;
al.append(_s[i3][i2][i1]);
// The mark for the known sample.
int m = marks[i3][i2][i1];
// Process the active list until empty.
solve(al, t, m, times, marks);
}
// Log elapsed time.
sw.stop();
log.fine("TimeMarker3.apply: end time=" + (int) sw.time());
}
private static void benchStream(File file, boolean buffered) throws IOException {
System.out.println("buffered=" + buffered);
Stopwatch sw = new Stopwatch();
int nh = 60; // like a trace header
int na = 1000; // like trace samples
int[] h = randint(nh);
float[] a = randfloat(na);
double maxtime = 60.0, s;
double mbytes = 4.0e-6 * (nh + na);
long nw, nr, rate;
FileOutputStream fos = new FileOutputStream(file);
ArrayOutputStream aos =
buffered
? new ArrayOutputStream(new BufferedOutputStream(fos))
: new ArrayOutputStream(fos);
sw.restart();
for (nw = 0, s = 0.0; sw.time() < maxtime; ++nw) {
s += sum(a);
aos.writeInts(h);
aos.writeFloats(a);
}
aos.close();
sw.stop();
rate = (int) (mbytes * nw / sw.time());
System.out.println("ArrayOutputStream: sum=" + s + " nw=" + nw + " rate=" + rate);
FileInputStream fis = new FileInputStream(file);
ArrayInputStream ais =
buffered ? new ArrayInputStream(new BufferedInputStream(fis)) : new ArrayInputStream(fis);
sw.restart();
for (nr = 0, s = 0.0; nr < nw; ++nr) {
ais.readInts(h);
ais.readFloats(a);
s += sum(a);
}
ais.close();
sw.stop();
rate = (int) (mbytes * nr / sw.time());
System.out.println(" ArrayInputStream: sum=" + s + " nr=" + nr + " rate=" + rate);
}