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<font face="Times New Roman, Times, serif">I updated my repository
and redid the webrev. The patch applied cleanly<br>
so I don't expect you'll notice much difference from the first but
if you<br>
haven't started, start here.<br>
<br>
<a class="moz-txt-link-freetext" href="http://cr.openjdk.java.net/~jmasa/6858051/webrev.01/">http://cr.openjdk.java.net/~jmasa/6858051/webrev.01/</a></font><br>
<br>
<div class="moz-cite-prefix">On 04/26/2016 10:06 PM, Jon Masamitsu
wrote:<br>
</div>
<blockquote cite="mid:572048BE.7090505@oracle.com" type="cite">6858051:
Create GC worker threads dynamically
<br>
<a class="moz-txt-link-freetext" href="https://bugs.openjdk.java.net/browse/JDK-6858051">https://bugs.openjdk.java.net/browse/JDK-6858051</a>
<br>
<br>
This change creates a minimal number of GC workers at JVM
initialization
<br>
and then adds additional workers as they are needed. This has
been made part of the
<br>
UseDynamicNumberOfGCThreads feature. When a parallel task is
about to
<br>
be executed, the number of workers needed to execute the task is
calculated (call
<br>
that number N). If that number of workers already exist, then no
additional workers
<br>
are created. If fewer than N exists, then additional workers are
created. Workers
<br>
are not destroyed if not needed for the task.
<br>
<br>
The UseParallelGC way of executing parallel tasks is different
from the other
<br>
collectors so it has a somewhat separate implementation.
<br>
<br>
<a class="moz-txt-link-freetext" href="http://cr.openjdk.java.net/~jmasa/6858051/webrev.00/">http://cr.openjdk.java.net/~jmasa/6858051/webrev.00/</a>
<br>
<br>
Testing: gc_test_suite with and without
UseDynamicNumberOfGCThreads.
<br>
Performance testing with the prototype did not show any regression
with
<br>
UseDynamicNumberOfGCThreads turned on. RBT testing for
hotspot_gc
<br>
is in progress.
<br>
<br>
Thanks.
<br>
<br>
Jon
<br>
<br>
</blockquote>
<br>
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