AFAR, it was not integrated at that time because of the performance impact even when the feature was turned off.<br>I believe it would be possible to refactor the code, at some cost, to get this to work without that performance<br>
impact, but that didn't get done. It might be time to revisit that code and do the requisite refactoring. Tony et al?<br><br>-- ramki<br><br><br><div class="gmail_quote">On Wed, Nov 16, 2011 at 3:45 PM, Michal Frajt <span dir="ltr"><<a href="mailto:michal@frajt.eu">michal@frajt.eu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div link="blue" vlink="purple" lang="CS"><div><p class="MsoNormal"><span lang="EN-US">Hi,<u></u><u></u></span></p><p class="MsoNormal">
<span lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US">Is there a way to get printed a survivor space class histogram on every minor collection run? Tony once provided us a special jdk build containing this feature but it got never integrated as a print flag into the main hotspot version. It was very useful for understanding and identifying promoted objects to the old gen. Additionally we were looking to get a class histogram print for the eden space but there was no easy way to implement it. The eden space class histogram would help to identify garbage invoking minor collection runs. It could be as well used to check the impact of the scalar replacements.<u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p><p class="MsoNormal"><span lang="EN-US">Would it be possible to reimplement both histogram prints?<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US"><u></u> <u></u></span></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,<u></u><u></u></span></p><p class="MsoNormal"><span lang="EN-US">Michal<u></u><u></u></span></p></div></div><br>_______________________________________________<br>
hotspot-gc-use mailing list<br>
<a href="mailto:hotspot-gc-use@openjdk.java.net">hotspot-gc-use@openjdk.java.net</a><br>
<a href="http://mail.openjdk.java.net/mailman/listinfo/hotspot-gc-use" target="_blank">http://mail.openjdk.java.net/mailman/listinfo/hotspot-gc-use</a><br>
<br></blockquote></div><br>