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Factor in inaccurancy of System.nanoTime

This commit is contained in:
Bob 2016-01-08 13:31:27 +01:00
parent d6815742b8
commit dbb10a4ed5
1 changed files with 4 additions and 1 deletions
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5
utils/src/test/java/com/cloud/utils/TestProfiler.java
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@ -28,9 +28,12 @@ import com.cloud.utils.testcase.Log4jEnabledTestCase;
public class TestProfiler extends Log4jEnabledTestCase {
protected final static Logger s_logger = Logger.getLogger(TestProfiler.class);
private static final long ONE_SECOND = 1000l;
private static final long MILLIS_FACTOR = 1000l;
private static final int MARGIN = 100;
// Profiler uses System.nanoTime which is not reliable on the millisecond
// A sleep of 1000 milliseconds CAN be measured as 999 milliseconds
// Therefore make the second larger, by 10% of the margin
private static final long ONE_SECOND = 1000l + (MARGIN / 10);
private static final double EXPONENT = 3d;
@Test