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List:       openjdk-serviceability-dev
Subject:    Low-Overhead Heap Profiling
From:       JC Beyler <jcbeyler () google ! com>
Date:       2016-12-13 21:11:52
Message-ID: CAF9BGBx8xFYudhJ=v1_hU5=nwEcC1X0NKRmC=E-RNN6SMs1ozg () mail ! gmail ! com
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Hello all,

This is a follow-up from Jeremy's initial email from last year:
http://mail.openjdk.java.net/pipermail/serviceability-dev/2015-June/017543.html

I've gone ahead and started working on preparing this and Jeremy and I went
down the route of actually writing it up in JEP form:
https://bugs.openjdk.java.net/browse/JDK-8171119

I think original conversation that happened last year in that thread still
holds true:

 - We have a patch at Google that we think others might be interested in
    - It provides a means to understand where the allocation hotspots are
at a very low overhead
    - Since it is at a low overhead, we can leave it on by default

So I come to the mailing list with Jeremy's initial question:
"I thought I would ask if there is any interest / if I should write a JEP /
if I should just forget it."

A year ago, it seemed some thought it was a good idea, is this still true?

Thanks,
Jc

[Attachment #3 (text/html)]

<div dir="ltr">Hello all,<div><br></div><div>This is a follow-up from Jeremy&#39;s \
initial email from last year:</div><div><a \
href="http://mail.openjdk.java.net/pipermail/serviceability-dev/2015-June/017543.html" \
>http://mail.openjdk.java.net/pipermail/serviceability-dev/2015-June/017543.html</a><br></div><div><br></div><div>I&#39;ve \
> gone ahead and started working on preparing this and Jeremy and I went down the \
> route of actually writing it up in JEP form:</div><div><span \
> style="color:rgb(17,85,204);font-size:12.8px;text-decoration:underline"><a \
> href="https://bugs.openjdk.java.net/">https://bugs.openjdk.java.net/</a></span><wbr \
> style="color:rgb(17,85,204);font-size:12.8px"><span \
> style="color:rgb(17,85,204);font-size:12.8px;text-decoration:underline">browse/JDK-8171119</span><br></div><div><span \
> style="color:rgb(17,85,204);font-size:12.8px;text-decoration:underline"><br></span></div><div>I \
> think original conversation that happened last year in that thread still holds \
> true:</div><div><br></div><div>  - We have a patch at Google that we think others \
> might be interested in</div><div>      - It provides a means to understand where \
> the allocation hotspots are at a very low overhead</div><div>      - Since it is at \
> a low overhead, we can leave it on by default</div><div><br></div><div>So I come to \
> the mailing list with Jeremy&#39;s initial question:  </div><div>&quot;<span \
> style="color:rgb(0,0,0)">I thought I would ask if there is any  </span><span \
> style="color:rgb(0,0,0)">interest / if I should write a JEP / if I should just \
> forget it.&quot;</span></div><div><span \
> style="color:rgb(0,0,0)"><br></span></div><div><font color="#000000">A year ago, it \
> seemed some thought it was a good idea, is this still true?</font></div><div><font \
> color="#000000"><br></font></div><div><font \
> color="#000000">Thanks,</font></div><div><font \
> color="#000000">Jc</font></div><div><br></div><div><br></div></div>



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