trouble passing JVM startup options using JTREG
yu.zhang at oracle.com
Mon Apr 17 23:49:39 UTC 2017
Can you do the following to be sure that hotspot did not take the parameter?
java -XX:ConcGCThreads=1 -XX:+PrintFlagsFinal
I am using jdk9b154, the output shows it changed the ConcGCThreads to 1
On 4/17/2017 4:33 PM, Ram Krishnan wrote:
> Many thanks Jonathan for the immediate reply.
> I am copying the hotspot gc team.
> Hotspot gc team -- your help would be much appreciated on the topic below.
> On Mon, Apr 17, 2017 at 2:29 PM, Jonathan Gibbons
> <jonathan.gibbons at oracle.com <mailto:jonathan.gibbons at oracle.com>> wrote:
> On 04/17/2017 02:18 PM, Ram Krishnan wrote:
>> I have been able to successfully run all the tests in
>> hotspot/test/gc/g1 using jtreg.
>> The only gotcha I am facing is that the JVM startup options
>> specified in process builder does not have any effect. I have
>> confirmed this through prints in the JVM code base.
>> For example,
>> TestEagerReclaimHumongousRegionsClearMarkBits.java modifies the
>> "-XX:ConcGCThreads=1", but inside the JVM code to value of
>> ConcGCThreads is still zero.
>> I am new to jtreg and openjdk and probably missing something
>> obvious. Your help would be much appreciated.
>> Thanks in advance,
> This does not look like an issue with jtreg, since the behavior
> you are apparently seeing is all within the test code and its
> You might want to follow up with the Hotspot team, who would have
> more familiarity with these tests and the associated libraries.
> -- Jon
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