RFR (S) 8217014: Epsilon should not ignore Metadata GC causes

Thomas Stüfe thomas.stuefe at gmail.com
Wed Jan 16 21:38:59 UTC 2019


Looks good to me.

Cheers, Thomas


On Wed 16. Jan 2019 at 22:00, Aleksey Shipilev <shade at redhat.com> wrote:

> Hi,
>
> On 1/16/19 9:34 PM, Thomas Stüfe wrote:
> > looks good.
>
> Thanks!
>
> > In your test you could set the initial metaspace size to a small size
> too for added effect, this
> > triggers a lot of resizing early on (eg -XX:MetaspaceSize=1m).
>
> Right. I was trying to achieve the same by setting Initial*, but
> MetaspaceSize is sure better.
>
> > nit: EpsilonHeap::print_metaspace_info(): I assume this cannot be called
> before metaspace is set up.
> > Still, would prefer checking for reserved=0 before printing the
> percentages.
>
> Nice catch. Checked for zero in both heap and metaspace cases. Also turned
> both methods private, so
> we control when they are called from within.
>
> New webrev:
>   http://cr.openjdk.java.net/~shade/8217014/webrev.02/
>
> Thanks,
> -Aleksey
>
>
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