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performance tests: adjust CPU timings to JBR 11

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GitOrigin-RevId: 433d033413da660da809b1e2c0af1f7468f85964
This commit is contained in:
peter
2019-05-17 17:06:08 +03:00
committed by intellij-monorepo-bot
parent 9ff256466a
commit 76e6d9e613
1 changed files with 8 additions and 1 deletions
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platform/testFramework/src/com/intellij/testFramework/Timings.java
+8 -1
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@@ -16,6 +16,7 @@
package com.intellij.testFramework;
import com.intellij.concurrency.JobSchedulerImpl;
import com.intellij.openapi.util.SystemInfo;
import com.intellij.openapi.util.io.FileUtil;
import java.io.*;
@@ -38,7 +39,13 @@ public class Timings {
public static final long REFERENCE_IO_TIMING = 100;
static {
CPU_TIMING = CpuTimings.calcStableCpuTiming();
long cpuTiming = CpuTimings.calcStableCpuTiming();
if (SystemInfo.isJavaVersionAtLeast(11, 0, 0)) {
// on JBR 11, the code for CPU timings executes much faster, while most tests take roughly the same time
// so we correct for the difference until we have a more robust timing calculation
cpuTiming = cpuTiming * 54 / 31;
}
CPU_TIMING = cpuTiming;
long start = System.nanoTime();
for (int i = 0; i < IO_PROBES; i++) {