<div dir="ltr"><div class="gmail_default" style="font-family:courier new,monospace">Hi Jenny,<br><br></div><div class="gmail_default" style="font-family:courier new,monospace">I tried what you suggested. Hotspot output indeed shows ConcGCThreads as 1.<br><br></div><div class="gmail_default" style="font-family:courier new,monospace">The problem seems to be interaction with jtreg.<br></div><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_default" style="font-family:courier new,monospace">Thanks,<br></div><div class="gmail_default" style="font-family:courier new,monospace">Ramki<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 17, 2017 at 4:49 PM, Jenny Zhang <span dir="ltr"><<a href="mailto:yu.zhang@oracle.com" target="_blank">yu.zhang@oracle.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
Ramki,<br>
<br>
Can you do the following to be sure that hotspot did not take the
parameter?<br>
java -XX:<div style="font-family:courier new,monospace;display:inline" class="gmail_default"></div>ConcGCThreads=1 -XX:+PrintFlagsFinal<br>
<br>
I am using jdk9b154, the output shows it changed the ConcGCThreads
to 1<br>
<br>
Thanks<br>
Jenny<br>
<br>
<div class="gmail-m_-1427578904799488884moz-cite-prefix">On 4/17/2017 4:33 PM, Ram Krishnan
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div style="font-family:courier new,monospace">Many thanks Jonathan for the immediate reply. <br>
<br>
I am copying the hotspot gc team.<br>
<br>
</div>
<div style="font-family:courier new,monospace">Hotspot gc team -- your help would be much
appreciated on the topic below.<br>
</div>
<div style="font-family:courier new,monospace"><br>
</div>
<div style="font-family:courier new,monospace">Thanks,<br>
</div>
<div style="font-family:courier new,monospace">Ramki<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Mon, Apr 17, 2017 at 2:29 PM,
Jonathan Gibbons <span dir="ltr"><<a href="mailto:jonathan.gibbons@oracle.com" target="_blank"></a><a class="gmail-m_-1427578904799488884moz-txt-link-abbreviated" href="mailto:jonathan.gibbons@oracle.com" target="_blank">jonathan.gibbons@oracle.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> <br>
<br>
<div class="gmail-m_-1427578904799488884m_7592252218846305182m_7329919051798114277moz-cite-prefix">On
04/17/2017 02:18 PM, Ram Krishnan wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div style="font-family:courier new,monospace">Hi,<br>
<br>
</div>
<div style="font-family:courier new,monospace">I
have been able to successfully run all the tests
in hotspot/test/gc/g1 using jtreg.<br>
<br>
</div>
<div style="font-family:courier new,monospace">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.<br>
<br>
</div>
<div style="font-family:courier new,monospace">For
example, <br clear="all">
</div>
<div>/hotspot/test/gc/g1/
TestEagerReclaimHumongousRegio<wbr>nsClearMarkBits.java
modifies the "-XX:ConcGCThreads=1", but inside the
JVM code to value of ConcGCThreads is still zero.<br>
</div>
<br>
<div>I am new to jtreg and openjdk and probably
missing something obvious. Your help would be much
appreciated. <br>
<br>
Thanks in advance,</div>
<div>Ramki</div>
<br>
</div>
</blockquote>
<br>
Ramki,<br>
<br>
This does not look like an issue with jtreg, since the
behavior you are apparently seeing is all within the
test code and its libraries.<br>
<br>
You might want to follow up with the Hotspot team, who
would have more familiarity with these tests and the
associated libraries.<br>
<br>
-- Jon<br>
<br>
</div>
</blockquote>
</div>
<br>
<br clear="all"><span class="gmail-HOEnZb"><font color="#888888">
<br>
-- <br>
<div class="gmail-m_-1427578904799488884m_7592252218846305182gmail_signature">
<div dir="ltr">Thanks,
<div>Ramki<br>
</div>
</div>
</div>
</font></span></div>
</div>
</blockquote>
<br>
</div>
</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr">Thanks, <div>Ramki<br></div></div></div>
</div></div>