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Record experiment outcomes with timers instead of counters.

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This commit is contained in:
Jon Chambers
2020-08-18 18:14:57 -04:00
committed by Jon Chambers
parent 7e8974683c
commit 56b27ea785
2 changed files with 78 additions and 66 deletions
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76
service/src/main/java/org/whispersystems/textsecuregcm/experiment/Experiment.java
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@@ -1,8 +1,8 @@
package org.whispersystems.textsecuregcm.experiment;
import com.google.common.annotations.VisibleForTesting;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.Metrics;
import io.micrometer.core.instrument.Timer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -11,7 +11,7 @@ import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import static com.codahale.metrics.MetricRegistry.name;
@@ -23,12 +23,12 @@ public class Experiment {
private final String name;
private final Counter matchCounter;
private final Counter errorCounter;
private final Timer matchTimer;
private final Timer errorTimer;
private final Counter bothPresentMismatchCounter;
private final Counter controlNullMismatchCounter;
private final Counter experimentNullMismatchCounter;
private final Timer bothPresentMismatchTimer;
private final Timer controlNullMismatchTimer;
private final Timer experimentNullMismatchTimer;
private static final String OUTCOME_TAG = "outcome";
private static final String MATCH_OUTCOME = "match";
@@ -44,74 +44,84 @@ public class Experiment {
public Experiment(final String... names) {
this(name(Experiment.class, names),
Metrics.counter(name(Experiment.class, names), OUTCOME_TAG, MATCH_OUTCOME),
Metrics.counter(name(Experiment.class, names), OUTCOME_TAG, ERROR_OUTCOME),
Metrics.counter(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, BOTH_PRESENT_MISMATCH),
Metrics.counter(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, CONTROL_NULL_MISMATCH),
Metrics.counter(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, EXPERIMENT_NULL_MISMATCH));
Metrics.timer(name(Experiment.class, names), OUTCOME_TAG, MATCH_OUTCOME),
Metrics.timer(name(Experiment.class, names), OUTCOME_TAG, ERROR_OUTCOME),
Metrics.timer(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, BOTH_PRESENT_MISMATCH),
Metrics.timer(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, CONTROL_NULL_MISMATCH),
Metrics.timer(name(Experiment.class, names), OUTCOME_TAG, MISMATCH_OUTCOME, MISMATCH_TYPE_TAG, EXPERIMENT_NULL_MISMATCH));
}
@VisibleForTesting
Experiment(final String name, final Counter matchCounter, final Counter errorCounter, final Counter bothPresentMismatchCounter, final Counter controlNullMismatchCounter, final Counter experimentNullMismatchCounter) {
Experiment(final String name, final Timer matchTimer, final Timer errorTimer, final Timer bothPresentMismatchTimer, final Timer controlNullMismatchTimer, final Timer experimentNullMismatchTimer) {
this.name = name;
this.matchCounter = matchCounter;
this.errorCounter = errorCounter;
this.matchTimer = matchTimer;
this.errorTimer = errorTimer;
this.bothPresentMismatchCounter = bothPresentMismatchCounter;
this.controlNullMismatchCounter = controlNullMismatchCounter;
this.experimentNullMismatchCounter = experimentNullMismatchCounter;
this.bothPresentMismatchTimer = bothPresentMismatchTimer;
this.controlNullMismatchTimer = controlNullMismatchTimer;
this.experimentNullMismatchTimer = experimentNullMismatchTimer;
}
public <T> void compareFutureResult(final T expected, final CompletionStage<T> experimentStage) {
final long startNanos = System.nanoTime();
experimentStage.whenComplete((actual, cause) -> {
final long durationNanos = System.nanoTime() - startNanos;
if (cause != null) {
recordError(cause);
recordError(cause, durationNanos);
} else {
recordResult(expected, actual);
recordResult(expected, actual, durationNanos);
}
});
}
public <T> void compareSupplierResult(final T expected, final Supplier<T> experimentSupplier) {
final long startNanos = System.nanoTime();
try {
recordResult(expected, experimentSupplier.get());
final T result = experimentSupplier.get();
recordResult(expected, result, System.nanoTime() - startNanos);
} catch (final Exception e) {
recordError(e);
recordError(e, System.nanoTime() - startNanos);
}
}
public <T> void compareSupplierResultAsync(final T expected, final Supplier<T> experimentSupplier, final Executor executor) {
final long startNanos = System.nanoTime();
try {
compareFutureResult(expected, CompletableFuture.supplyAsync(experimentSupplier, executor));
} catch (final Exception e) {
recordError(e);
recordError(e, System.nanoTime() - startNanos);
}
}
private void recordError(final Throwable cause) {
private void recordError(final Throwable cause, final long durationNanos) {
log.warn("Experiment {} threw an exception.", name, cause);
errorCounter.increment();
errorTimer.record(durationNanos, TimeUnit.NANOSECONDS);
}
@VisibleForTesting
<T> void recordResult(final T expected, final T actual) {
<T> void recordResult(final T expected, final T actual, final long durationNanos) {
if (expected instanceof Optional && actual instanceof Optional) {
recordResult(((Optional)expected).orElse(null), ((Optional)actual).orElse(null));
recordResult(((Optional)expected).orElse(null), ((Optional)actual).orElse(null), durationNanos);
} else {
final Counter counter;
final Timer Timer;
if (Objects.equals(expected, actual)) {
counter = matchCounter;
Timer = matchTimer;
} else if (expected == null) {
counter = controlNullMismatchCounter;
Timer = controlNullMismatchTimer;
} else if (actual == null) {
counter = experimentNullMismatchCounter;
Timer = experimentNullMismatchTimer;
} else {
counter = bothPresentMismatchCounter;
Timer = bothPresentMismatchTimer;
}
counter.increment();
Timer.record(durationNanos, TimeUnit.NANOSECONDS);
}
}
}