vanzin commented on a change in pull request #23838: [SPARK-26928][CORE] Add
driver CPU Time to the metrics system
URL: https://github.com/apache/spark/pull/23838#discussion_r260952399
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File path: core/src/main/scala/org/apache/spark/SparkContext.scala
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@@ -568,6 +569,10 @@ class SparkContext(config: SparkConf) extends Logging {
_taskScheduler.postStartHook()
_env.metricsSystem.registerSource(_dagScheduler.metricsSource)
_env.metricsSystem.registerSource(new
BlockManagerSource(_env.blockManager))
+ // Register JVMCPUSource to the metrics system if
spark.metrics.cpu.time.driver.enabled==true
Review comment:
The comment just repeats the code.
Why would you not enable this source? It seems to be always on for
executors, what would be the drawback of doing the same for the driver?
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