@Override
protected T compute() {
T currentBest = initial;
for (int step = 0; step < steps; step++) {
logger.log(
Level.INFO,
"On iteration step {0}, current best has score {1}",
new Object[] {step, scorer.score(currentBest)});
double temp = primaryTempFun.temperature(step, steps);
ForkJoinTask<T> task = new ParallelOptimizationStep(currentBest, temp);
stopwatch.start();
currentBest = task.invoke();
stopwatch.stop();
logger.log(
Level.INFO,
"Iteration step {0} took {1}ms wall clock time",
new Object[] {step, stopwatch.elapsedMillis()});
}
return currentBest;
}
@Override
protected T compute() {
long start = System.currentTimeMillis();
long dur = duration.getMillis();
long lastUpdate = start;
int step;
T currentBest = initial;
Csv.Builder builder = Csv.newBuilder();
long totalTime = 0;
for (step = 0; System.currentTimeMillis() - start < dur; step++) {
logger.log(
Level.INFO,
"On iteration step {0}, current best has score {1}",
new Object[] {step, scorer.score(currentBest)});
double temp =
primaryTempFun.temperature((int) (System.currentTimeMillis() - start), (int) dur);
ForkJoinTask<T> task = new ParallelOptimizationStep(currentBest, temp);
stopwatch.start();
currentBest = task.invoke();
stopwatch.stop();
if (step % 20 == 0) {
builder.add(
Csv.newRowBuilder()
.add("%d", System.currentTimeMillis() - start)
.add("%8.3f", scorer.score(currentBest))
.build());
}
logger.log(
Level.FINE,
"Iteration {0} took {1} of wall clock time",
new Object[] {
step,
Converters.PERIOD_FORMATTER.print(Period.millis((int) stopwatch.elapsedMillis()))
});
totalTime += stopwatch.elapsedMillis();
logger.log(
Level.FINER,
"Average step time: {0}",
new Object[] {
Converters.PERIOD_FORMATTER.print(Period.millis((int) (totalTime / (step + 1))))
});
stopwatch.reset();
if ((System.currentTimeMillis() - lastUpdate) > noProgressCancel.getMillis()) {
logger.log(Level.INFO, "Cutting off optimization for lack of progress");
break;
}
}
if (step != 0) {
logger.log(
Level.INFO,
"Average optimizer iteration took {0}",
Duration.millis((long) (System.currentTimeMillis() - start) / step)
.toPeriod()
.toString(Converters.PERIOD_FORMATTER));
}
try {
Files.write(builder.build().toString(), new File("optimization-log.csv"), Charsets.UTF_8);
} catch (IOException e) {
logger.throwing("ConcurrentOptimizer", "log", e);
}
return currentBest;
}