PageCache (OpenJ9 JDK 11)

java.lang.Object
- com.ibm.dtfj.corereaders.PageCache

```
public class PageCache
extends Object
```
Simple paging cache, to speedup getMemoryBytes

Nested Class Summary

Nested Classes
Modifier and Type Class Description

class PageCache.Page

Field Summary

Fields
Modifier and Type	Field	Description
`protected byte[]`	`bytes`
`protected int`	`evictGrowth`
`protected int`	`evictPeriod`
`protected int`	`evictTick`
`int`	`hiUsage`
`int`	`loUsage`
`protected long`	`lruBits`
`protected int`	`maxGrowth`
`protected int`	`maxPeriod`
`protected static int`	`NO_KEY`
`int`	`numPages`
`protected PageCache.Page[]`	`pages`
`int`	`pageSize`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type Method Description

PageCache.Page find(int key, long vaddr, int size)

protected void initialize()
- Methods declared in class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

bytes
```
protected byte[] bytes
```

NO_KEY
```
protected static final int NO_KEY
```
See Also:

Constant Field Values

numPages
```
public int numPages
```

pageSize
```
public int pageSize
```

hiUsage
```
public int hiUsage
```

loUsage
```
public int loUsage
```

pages
```
protected PageCache.Page[] pages
```

lruBits
```
protected long lruBits
```

evictTick
```
protected int evictTick
```

evictPeriod
```
protected int evictPeriod
```

evictGrowth
```
protected int evictGrowth
```

maxPeriod
```
protected int maxPeriod
```

maxGrowth
```
protected int maxGrowth
```

Method Detail

initialize
```
protected void initialize()
```

find

public PageCache.Page find(int key,
                           long vaddr,
                           int size)