stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8246259: JFR: Fetch VM memory pools without using streams

Browse Source 
Reviewed-by: mgronlun
This commit is contained in:
Erik Gahlin 2020-06-01 22:55:22 +02:00
parent 5e5880d4f1
commit 567692e4ae
2 changed files with 16 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
src/jdk.jfr/share/classes/jdk/jfr/events/AbstractBufferStatisticsEvent.java
View File

@ -26,31 +26,36 @@
package jdk.jfr.events;
import jdk.internal.misc.VM.BufferPool;
import jdk.internal.misc.VM;
import jdk.jfr.*;
import jdk.jfr.internal.Type;
@Category({ "Java Application", "Statistics" })
public abstract class AbstractBufferStatisticsEvent extends AbstractJDKEvent {
AbstractBufferStatisticsEvent() {
BufferPool bufferPool = getBufferPool();
protected AbstractBufferStatisticsEvent(BufferPool bufferPool) {
count = bufferPool.getCount();
totalCapacity = bufferPool.getTotalCapacity();
memoryUsed = bufferPool.getMemoryUsed();
}
@Label("Count")
public long count;
final long count;
@Label("Total Capacity")
@DataAmount
public long totalCapacity;
final long totalCapacity;
@Label("Memory Used")
@DataAmount
public long memoryUsed;
final long memoryUsed;
abstract BufferPool getBufferPool();
static BufferPool findPoolByName(String name) {
for (BufferPool pool : VM.getBufferPools()) {
if (pool.getName().equals(name)) {
return pool;
}
}
throw new InternalError("No buffer pool with name " + name);
}
}

11
src/jdk.jfr/share/classes/jdk/jfr/events/DirectBufferStatisticsEvent.java
View File

@ -36,20 +36,15 @@ import jdk.jfr.internal.Type;
@Description("Statistics of direct buffer")
public final class DirectBufferStatisticsEvent extends AbstractBufferStatisticsEvent {
private static final BufferPool DIRECT_BUFFER_POOL = VM.getBufferPools().stream()
.filter(p -> "direct".equals(p.getName()))
.findFirst().get();
private static final BufferPool DIRECT_BUFFER_POOL = findPoolByName("direct");
public DirectBufferStatisticsEvent() {
super(DIRECT_BUFFER_POOL);
this.maxCapacity = VM.maxDirectMemory();
}
@Label("Maximum Capacity")
@Description("Maximum direct buffer capacity the process can use")
@DataAmount
public long maxCapacity;
BufferPool getBufferPool() {
return DIRECT_BUFFER_POOL;
}
final long maxCapacity;
}