Commit 58eaa67

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Drain threads for memory cache hit rate analysis (#553)

* drain threads * faster * fix title ---------

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+29

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+29

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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -31,7 +31,7 @@ public async Task Run()`
`31`	`31`
`32`	`32`	`this.config.Analysis.WriteToConsole();`
`33`	`33`	`Analysis<long>.WriteToFile(this.config.Name, this.config.Analysis);`
`34`		`- Analysis<long>.Plot(this.config.Title, this.config.Name, this.config.Analysis);`
	`34`	`+ Analysis<long>.Plot(this.config.Name, this.config.Title, this.config.Analysis);`
`35`	`35`	`}`
`36`	`36`
`37`	`37`	`private int AnalyzeSmall()`

Lines changed: 1 addition & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -63,6 +63,7 @@ public V GetOrAdd(K key, Func<K, V> valueFactory)`
`63`	`63`	`entry.SetSize(1);`
`64`	`64`
`65`	`65`	`this.metrics.requestMissCount++;`
	`66`	`+ ThreadPoolInspector.WaitForEmpty();`
`66`	`67`	`}`
`67`	`68`	`else`
`68`	`69`	`{`

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+using System;`
	`2`	`+using System.Threading;`
	`3`	`+`
	`4`	`+namespace BitFaster.Caching.HitRateAnalysis`
	`5`	`+{`
	`6`	`+ internal class ThreadPoolInspector`
	`7`	`+ {`
	`8`	`+ public static void WaitForEmpty()`
	`9`	`+ {`
	`10`	`+ while (ThreadPool.PendingWorkItemCount > 0)`
	`11`	`+ {`
	`12`	`+ Thread.Yield();`
	`13`	`+`
	`14`	`+ // This is very hacky, but by experimentation 300 Sleep(0) consistently takes longer`
	`15`	`+ // than cache maintenance giving stable results with around 25% run time penalty.`
	`16`	`+ // Sleep(1) makes the test take 50x longer.`
	`17`	`+ if (ThreadPool.PendingWorkItemCount == 0)`
	`18`	`+ {`
	`19`	`+ for (int i = 0; i < 300; i++)`
	`20`	`+ {`
	`21`	`+ Thread.Sleep(0);`
	`22`	`+ }`
	`23`	`+ }`
	`24`	`+ }`
	`25`	`+ }`
	`26`	`+ }`
	`27`	`+}`

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