richardstartin commented on a change in pull request #6886:
URL: https://github.com/apache/incubator-pinot/pull/6886#discussion_r628473211
##########
File path:
pinot-core/src/main/java/org/apache/pinot/core/operator/InstanceResponseOperator.java
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@@ -45,8 +46,39 @@ protected InstanceResponseBlock getNextBlock() {
DataTable dataTable = instanceResponseBlock.getInstanceResponseDataTable();
mainThreadTimer.stop();
- long totalThreadCpuTimeNs =
- intermediateResultsBlock.getExecutionThreadCpuTimeNs() +
mainThreadTimer.getThreadTimeNs();
+ long endWallClockTimeNs = System.nanoTime();
+
+ long singleThreadCpuTimeNs = mainThreadTimer.getThreadTimeNs();
+ long multipleThreadCpuTimeNs =
intermediateResultsBlock.getExecutionThreadCpuTimeNs();
Review comment:
Just a note that if this is backed by
`ThreadMXBean.getCurrentThreadCpuTime` and the JVM is not running on bare
metal, this call can take up to half a millisecond.
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