I am running SPECjAppServer2002 with WebLogic Server 8.1 and JDK 1.4.1_02.

Here is the version of JDK 1.4.1_02 that I am using:
<gar07.4> /export/VMs/j2sdk1.4.1_02/bin/java -version
java version "1.4.1_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1_02-b06)
Java HotSpot(TM) Client VM (build 1.4.1_02-b06, mixed mode)

The system is a V240 with solaris S9U3:
<gar07.5> more /etc/release
                        Solaris 9 4/03 s9s_u3wos_04 SPARC
           Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
                        Use is subject to license terms.
                           Assembled 16 December 2002

After rebooting the system I use the following command line to start the appserver:
+ /export/VMs/j2sdk1.4.1_02/bin/java -server -verbose:gc -XX:+PrintGCTimeStamps
-XX:+UseMPSS -XX:+AggressiveHeap -Xms3500m -Xmx3500m -Xmn600m -Dweblogic.oci.sel
ectBlobChunkSize=1600 -classpath ...

The process should have some annon segments mapped to 4M, but it doesn't:
<gar07.7> ps -ef | grep java
  ecuser 541 533 12 10:30:33 ? 0:50 /export/VMs/j2sdk1.4.1_02/bin/java -server -verbose:gc -XX:+PrintGCTimeStamps -
  ecuser 566 343 0 10:31:24 pts/1 0:00 grep java
<gar07.8> pmap -s 541 | grep 4M
<gar07.9>

If I do exactly the same using JDK 1.4.2 instead of JDK1.4.1_02 I am able to get
4M pages. Here is the command line for 1.4.2:
+ /export/VMs/j2sdk1.4.2/bin/java -server -verbose:gc -XX:+PrintGCTimeStamps -XX
:+PrintGCDetails -XX:+AggressiveHeap -Xms3500m -Xmx3500m -Dweblogic.oci.selectBl
obChunkSize=1600 -classpath ...

And here are my 4M pages:
<gar07.20> pmap -s `pgrep java` | grep 4M
1AC00000 282624K 4M rwx-- [ anon ]
F5800000 16384K 4M rwx-- [ anon ]
F6800000 4096K 4M rwx-- [ anon ]
F6C00000 4096K 4M rwx-- [ anon ]
F7000000 4096K 4M rwx-- [ anon ]
F9C00000 4096K 4M rwx-- [ anon ]

Without large pages the time spent in TLB misses for this benchmark is 25% (!)
Using 4M pages that time is reduce to 3%. WLS8.1 was certified with 1.4.1_02 so
we cannot use 1.4.2 for the benchmark.

 thanks for your help,

  Fernando Castano