Partial jtr log from a run on a slow machine:

#Test Results (version 2)
#Tue Sep 29 08:34:12 EDT 2009
#checksum:5f8e64b2fcd7dfcf
#-----testdescription-----
$file=/export/local/common/testbase/jtreg/HS_REGRESSION/test/gc/6845368/bigobj.java
$root=/export/local/common/testbase/jtreg/HS_REGRESSION/test
author=John Coomes
keywords=bug6845368 othervm
run=USER_SPECIFIED main/othervm -Xmx64m bigobj\n
source=bigobj.java
title=ensure gc updates references > 64K bytes from the start of the obj

#-----environment-----

#-----testresult-----
description=file:/export/local/common/testbase/jtreg/HS_REGRESSION/test/gc/6845368/bigobj.java
end=Tue Sep 29 08:34:12 EDT 2009
environment=regtest
execStatus=Error. Can't load test: java.lang.ClassNotFoundException: bigobj
javatestOS=SunOS 5.10 (sparc)
javatestVersion=4.1.3a
script=com.sun.javatest.regtest.RegressionScript 
sections=script_messages build compile main
start=Tue Sep 29 08:27:46 EDT 2009
test=gc/6845368/bigobj.java
work=/export/local/22053.JDK7.NIGHTLY.VM+solaris-sparc_server_comp_HS_REGRESSION/results/workDir/gc/6845368

#section:script_messages
----------messages:(5/291)----------
JDK under test: (/export/local/common/jdk/baseline/solaris-sparc)
java version "1.7.0-ea-fastdebug"
Java(TM) SE Runtime Environment (build 1.7.0-ea-fastdebug-b72)
OpenJDK Server VM (build 17.0-b01-2009-09-29-001524.cf231476.6886353-fastdebug, mixed mode)
Timeout signalled after 360 seconds

#section:build
----------messages:(3/92)----------
command: build bigobj
reason: Named class compiled on demand
elapsed time (seconds): 360.08
result: Passed. Build successful

#section:compile
----------messages:(3/177)----------
command: compile /export/local/common/testbase/jtreg/HS_REGRESSION/test/gc/6845368/bigobj.java
reason: .class file out of date or does not exist
elapsed time (seconds): 360.013
----------System.out:(0/0)----------
----------System.err:(0/0)----------
result: Error. Compilation failed
Posted Date : 2009-10-02 22:30:13.0

The name of test which fails:
gc/6845368/bigobj.java
Posted Date : 2009-10-05 14:44:19.0

N/A

The time it takes to compile the test program with javac exceeds the default timeout on some machines.  bigobj.java contains a class with almost 64K fields, which exposes a corner case in javac performance.  Increase the timeout to avoid the failure.
Posted Date : 2009-10-02 22:30:13.0

http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/8afee153274a
Posted Date : 2009-10-05 15:07:50.0