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Use System.nanoTime() instead threadMxBean.getCurrentThreadUserTime()

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This commit is contained in:
Stanislav Erokhin
2015-06-25 16:05:18 +03:00
parent 45a3d7ec46
commit 298a27951f
2 changed files with 15 additions and 16 deletions
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compiler/frontend/src/org/jetbrains/kotlin/util/PerformanceCounter.kt
+11 -12
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@@ -20,18 +20,17 @@ import java.lang.management.ManagementFactory
import java.util.*
import java.util.concurrent.TimeUnit
/**
* This counter is thread-safe for initialization and usage.
* But it may calculate time and number of runs not precisely.
*/
public abstract class PerformanceCounter protected constructor(val name: String) {
companion object {
private val threadMxBean = ManagementFactory.getThreadMXBean()
private val allCounters = arrayListOf<PerformanceCounter>()
private var enabled = false
init {
threadMxBean.setThreadCpuTimeEnabled(true)
}
public fun currentThreadCpuTime(): Long = threadMxBean.getCurrentThreadUserTime()
public fun currentTime(): Long = System.nanoTime()
public fun report(consumer: (String) -> Unit) {
val countersCopy = synchronized(allCounters) {
@@ -106,12 +105,12 @@ public abstract class PerformanceCounter protected constructor(val name: String)
private class SimpleCounter(name: String): PerformanceCounter(name) {
override fun <T> countTime(block: () -> T): T {
val startTime = PerformanceCounter.currentThreadCpuTime()
val startTime = PerformanceCounter.currentTime()
try {
return block()
}
finally {
totalTimeNanos += PerformanceCounter.currentThreadCpuTime() - startTime
totalTimeNanos += PerformanceCounter.currentTime() - startTime
}
}
}
@@ -128,14 +127,14 @@ private class ReenterableCounter(name: String): PerformanceCounter(name) {
}
override fun <T> countTime(block: () -> T): T {
val startTime = PerformanceCounter.currentThreadCpuTime()
val startTime = PerformanceCounter.currentTime()
val needTime = enterCounter(this)
try {
return block()
}
finally {
if (needTime) {
totalTimeNanos += PerformanceCounter.currentThreadCpuTime() - startTime
totalTimeNanos += PerformanceCounter.currentTime() - startTime
leaveCounter(this)
}
}
@@ -188,10 +187,10 @@ private class CounterWithExclude(name: String, vararg excludedCounters: Performa
fun Stack<Boolean>.peekOrFalse() = if (isEmpty()) false else peek()
private fun intervalUsefulTime(callStackUpdate: Stack<Boolean>.() -> Unit): Long {
val delta = if (callStack.peekOrFalse()) PerformanceCounter.currentThreadCpuTime() - intervalStartTime else 0
val delta = if (callStack.peekOrFalse()) PerformanceCounter.currentTime() - intervalStartTime else 0
callStack.callStackUpdate()
intervalStartTime = PerformanceCounter.currentThreadCpuTime()
intervalStartTime = PerformanceCounter.currentTime()
return delta
}