Re: [Jikesrvm-regression] [Linux] regression FAILED 4 tests

[Perry C. <per...@us...>]

I've located the decreasing total memory in JMTk configuration to a bug in
the implementation of totalMemory().  In looking at that however, it seems
that the watson collectors were not counting immortal heap in total space
usage putting JMTk at a slight disadvantage.  This may be related to the
performance degradation.

Perry


Michael Hind/Watson/IBM@IB...@ww... on 11/25/2002
08:18:01 AM

Please respond to jik...@ww...

Sent by:    jik...@ww...


To:    jik...@ww...
cc:
Subject:    Re: [Jikesrvm-regression] [Linux] regression FAILED       4
       tests








(1) JMTkBaseAdaptiveSemispace null pointer exception in
VM_Runtime.checkstore on utft.

(2) JMTkBaseBaseHybrid tripped an assertion that is checking that memory is
zeroed on SPECjbb2000.

(3) JMTkBaseBaseGenCopy and FastSemispace on SPECjbb2000: killed because of
timer

(4) All JMTk configurations continue to appear to be losing heap space on
SPECjbb2000.  The number reported for total heap is smaller after each
interval.

Details:
(1) JMTkBaseAdaptiveSemispace null pointer exception in
VM_Runtime.checkstore on utft.
VM_RuntimeCompiler: boot (adaptive compilation)
java.lang.NullPointerException
             at com.ibm.JikesRVM.librarySupport.StackTrace.create
(StackTrace.java:38)
             at java.lang.Throwable.fillInStackTrace (Throwable.java:118)
             at java.lang.Throwable.<init> (Throwable.java:59)
             at java.lang.Exception.<init> (Exception.java:32)
             at java.lang.RuntimeException.<init>
(RuntimeException.java:28)
             at java.lang.NullPointerException.<init>
(NullPointerException.java:29)
             at com.ibm.JikesRVM.VM_Runtime.deliverHardwareException
(VM_Runtime.java:555)
             at <hardware trap>
             at com.ibm.JikesRVM.VM_Runtime.checkstore
(VM_Runtime.java:175)
             at utf8test.<clinit> (utf8test.java:2)
             at com.ibm.JikesRVM.VM_Class.initialize (VM_Class.java:1526)
             at com.ibm.JikesRVM.MainThread.run (MainThread.java:111)
             at com.ibm.JikesRVM.VM_Thread.startoff (VM_Thread.java:594)

(2) JMTkBaseBaseHybrid tripped an assertion that is checking that memory is
zeroed on SPECjbb2000.
Timing Measurement began Mon Nov 25 05:32:40 GMT 2002 for .42 minutes
Memory range is not zeroed: 0x7502fff0 .. 0x75030004
---- Dumping memory from 0x7502fff0 to 0x75030004 ----
0: 0x7502fff0 0
4: 0x7502fff4 0
8: 0x7502fff8 0
12: 0x7502fffc 0
16: 0x75030000 1
vm internal error at:

-- Stack --
   Lcom/ibm/JikesRVM/VM; sysFail(Ljava/lang/String;)V at line 597
   Lcom/ibm/JikesRVM/VM; _assertionFailure(Ljava/lang/String;)V at line 363
   Lcom/ibm/JikesRVM/VM; _assert(ZLjava/lang/String;)V at line 357
   Lcom/ibm/JikesRVM/VM; _assert(Z)V at line 340
   Lcom/ibm/JikesRVM/memoryManagers/JMTk/Plan;
alloc(IZILcom/ibm/JikesRVM/memoryManagers/vmInterface/AllocAdvice;)Lcom/ibm/JikesRVM/VM_Address;

 at line 172
   Lcom/ibm/JikesRVM/memoryManagers/vmInterface/VM_Interface;
allocateScalar(I[Ljava/lang/Object;I)Ljava/lang/Object; at line 368
   Lcom/ibm/JikesRVM/VM_Runtime;
resolvedNewScalar(I[Ljava/lang/Object;ZI)Ljava/lang/Object; at line 260
   Ljava/lang/StringBuffer; toString()Ljava/lang/String; at line 861
   Lspec/jbb/Company;
getCustomerByLastName(SBLjava/lang/String;Z)Lspec/jbb/Customer; at line 677
   Lspec/jbb/PaymentTransaction; process()Z at line 298
   Lspec/jbb/TransactionManager; go()V at line 327
   Lspec/jbb/JBBmain; run()V at line 258
   Ljava/lang/Thread; run()V at line 774
   Lcom/ibm/JikesRVM/VM_Thread; startoff()V at line 594
vm: exit 1




- - - - - - - - - - - - - - - -
Michael Hind, Manager, Dynamic Optimization Group, Jalapeño Project

IBM Watson Research Center
http://www.research.ibm.com/people/h/hind
hi...@wa..., 914 784-7589, tie: 863-7589
Jikes RVM open source release:
http://www.ibm.com/developerworks/oss/jikesrvm

_______________________________________________
Jikesrvm-regression mailing list
Jik...@ww...
 http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jikesrvm-regression