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try to stabilize performance test timings even more

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peter
2017-03-31 10:02:34 +02:00
parent 4add76b4ef
commit 482e0a739a
3 changed files with 13 additions and 10 deletions
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platform/testFramework/src/com/intellij/testFramework/CpuTimings.java
+8 -6
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@@ -23,7 +23,6 @@ import javax.management.MBeanServer;
import javax.management.ObjectName;
import java.lang.management.ManagementFactory;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.stream.LongStream;
/**
@@ -33,9 +32,11 @@ public class CpuTimings {
final long[] rawData;
long average;
private final double myStandardDeviation;
private final int attempt;
private CpuTimings(long[] rawData) {
private CpuTimings(long[] rawData, int attempt) {
this.rawData = rawData;
this.attempt = attempt;
average = ArrayUtil.averageAmongMedians(rawData, 2);
myStandardDeviation = standardDeviation(rawData);
}
@@ -52,14 +53,14 @@ public class CpuTimings {
@Override
public String toString() {
return "CpuTimings{" + average + ", raw=" + Arrays.toString(rawData) + ", sd=" + myStandardDeviation + '}';
return average + "[sd=" + myStandardDeviation + ", attempt=" + attempt + "]";
}
@SuppressWarnings("UseOfSystemOutOrSystemErr")
static CpuTimings calcStableCpuTiming() {
int maxIterations = UsefulTestCase.IS_UNDER_TEAMCITY ? 100 : 10;
for (int i = 0;; i++) {
CpuTimings timings = calcCpuTiming(20, CpuTimings::addBigIntegers);
CpuTimings timings = calcCpuTiming(20, CpuTimings::addBigIntegers, i);
if (timings.myStandardDeviation < 1.8) {
return timings;
}
@@ -71,17 +72,18 @@ public class CpuTimings {
System.out.println(i + ": Unstable timings: " + timings+" (getProcessCpuLoad() = " + getProcessCpuLoad()+"; getSystemCpuLoad() = " + getSystemCpuLoad()+")");
}
System.gc();
PlatformTestUtil.waitForAllBackgroundActivityToCalmDown();
}
}
private static CpuTimings calcCpuTiming(int iterationCount, Runnable oneIteration) {
private static CpuTimings calcCpuTiming(int iterationCount, Runnable oneIteration, int attempt) {
long[] elapsed = new long[iterationCount];
for (int i = 0; i < iterationCount; i++) {
long start = System.currentTimeMillis();
oneIteration.run();
elapsed[i] = System.currentTimeMillis() - start;
}
return new CpuTimings(elapsed);
return new CpuTimings(elapsed, attempt);
}
private static void addBigIntegers() {
platform/testFramework/src/com/intellij/testFramework/PlatformTestUtil.java
+1 -1
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@@ -680,7 +680,7 @@ public class PlatformTestUtil {
}
}
private static void waitForAllBackgroundActivityToCalmDown() {
static void waitForAllBackgroundActivityToCalmDown() {
for (int i = 0; i < 50; i++) {
CpuUsageData data = CpuUsageData.measureCpuUsage(() -> TimeoutUtil.sleep(100));
if (!data.hasAnyActivityBesides(Thread.currentThread())) {
platform/testFramework/src/com/intellij/testFramework/Timings.java
+4 -3
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@@ -28,6 +28,7 @@ public class Timings {
private static final int IO_PROBES = 42;
public static final long CPU_TIMING;
private static final CpuTimings CPU_TIMING_DATA;
public static final long IO_TIMING;
/**
@@ -37,8 +38,8 @@ public class Timings {
public static final long REFERENCE_IO_TIMING = 100;
static {
CpuTimings timings = CpuTimings.calcStableCpuTiming();
CPU_TIMING = timings.average;
CPU_TIMING_DATA = CpuTimings.calcStableCpuTiming();
CPU_TIMING = CPU_TIMING_DATA.average;
long start = System.currentTimeMillis();
for (int i = 0; i < IO_PROBES; i++) {
@@ -96,7 +97,7 @@ public class Timings {
public static String getStatistics() {
return
" Timings: CPU=" + CPU_TIMING + " (" + (int)(CPU_TIMING * 1.0 / REFERENCE_CPU_TIMING * 100) + "% of the reference CPU)" +
" Timings: CPU=" + CPU_TIMING_DATA + " (" + (int)(CPU_TIMING * 1.0 / REFERENCE_CPU_TIMING * 100) + "% of the reference CPU)" +
", I/O=" + IO_TIMING + " (" + (int)(IO_TIMING * 1.0 / REFERENCE_IO_TIMING * 100) + "% of the reference IO)" +
", " + Runtime.getRuntime().availableProcessors() + " cores.";
}