On 27/07/2013 9:09 AM, Mike Duigou wrote:
Hello all;
I heard word from Alan Bateman that the jdk/test/TEST.ROOT includes accurate
specification of which tests cannot be run by JTReg in agentvm mode. ie. they
require othervm mode. I tested out removing the duplicate othervm specification
from the jdk/test/Makefile and everything still seems to run.
http://cr.openjdk.java.net/~mduigou/JDK-8021588/0/webrev/
Removes othervm specifications from the test/Makefile and other resulting
simplifications.
This lets us further simplify the jdk/test/Makefile and removes needless
duplication. Great!
I've been playing with another change inspired by work done by Tim Bell. When
running tests concurrently it helps to specify -XX+UseSerialGC to avoid over
creation of GC threads for what are mostly short lived tests. Testing jdk_utils
on my 24 core / 32GB dev box using serial GC provides about 5%-10% speedup and
appears to reduce memory usage by 20% or more. Unfortunately there are a few
tests in java.lang.manangement which explicitly request incompatible GC
options. I haven't figured out yet how to allow these tests to override the
-XX+UseSerialGC vmoption in a sane way. (I can think of several rude ways to do
it). So for now, this change is commented out.
Not sure that forcing use of SerialGC is good for general
testing/test-coverage.
The conflicting gc options is a known but as yet unresolved issue.
David
Mike
