[HARMONY-5523] [drlvm][gc][lang-management][geronimo] MemoryUsage returns incorrect values

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 5.0M4, 5.0M5
• Component/s: App-Oriented Bug Reports, DRLVM
• Assignee: Unassigned
• Reporter: Vasily Zakharov
• Created: 18/Feb/08 01:36
• Updated: 31/Mar/08 15:39

Description

The following test demonstrates the problem:

public class Test {
public static void main(String[] args) throws Exception

{ System.out.println(java.lang.management.ManagementFactory.getMemoryMXBean().getHeapMemoryUsage()); }

}

Output on RI:

$ java Test
init = 0(0K) used = 162416(158K) committed = 2031616(1984K) max = 66650112(65088K)

$ java -Xms128M -Xmx256M Test
init = 134217728(131072K) used = 166480(162K) committed = 133234688(130112K) max = 266403840(260160K)

Output on Harmony:

$ java Test
MemoryUsage: init=16777216used=16777216committed=16777216max=16777216

$ java -Xms128M -Xmx256M Test
MemoryUsage: init=134217728used=134217728committed=134217728max=134217728

Clearly enough, the following problems do exist:

1. getUsed() method always returns the -Xms value instead of actual used memory amount.
2. getMax() method returns the -Xms value instead of -Xmx value.
3. toString() method works incorrectly (output is badly readable).

This issues causes the Geronimo console to display the used memory information incorrectly.