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@rednaxelafx
rednaxelafx / log1
Created July 14, 2011 03:49
analyzing an endless loop problem caused by concurrent access to HashMap.get()
$ top -H
...
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
19115 root 25 0 576m 217m 9432 R 99.7 5.3 1357:12 java
28347 root 25 0 576m 217m 9432 R 99.7 5.3 1191:05 java
26912 root 25 0 576m 217m 9432 R 99.3 5.3 114:58.57 java
5607 root 25 0 576m 217m 9432 R 99.0 5.3 54:49.02 java
@rednaxelafx
rednaxelafx / DumpClassURL.java
Created December 7, 2011 05:48
Using the ProtectionDomain of an InstanceKlass to see where it was loaded from
import java.io.*;
import java.util.*;
import sun.jvm.hotspot.memory.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.tools.*;
public class DumpClassURL extends Tool {
public void run() {
@moraes
moraes / gist:2141121
Last active May 1, 2023 19:02
LIFO Stack and FIFO Queue in golang
package main
import (
"fmt"
)
type Node struct {
Value int
}