RFR: 8177959: G1CollectedHeap::print_on prints incorrect capacity

[Stefan Johansson]

Hi Leo,

On 2017-10-26 11:57, Leo Korinth wrote:
> Hi,
>
> Remove wrong/inaccurate reporting in print_on() in g1
>
> In g1 -- when printing the memory region used -- the middle value is
> incorrectly calculated using (+) instead of (*). Further more, the
> middle value in the print does not give precise information. In g1 the
> heap is not necessarily contiguous, and holes of non-committed memory
> can be present. Thus, instead of fixing the typo, the printout is
> modified and the middle value removed.
>
> A more detailed (and verbose) memory usage map is printed in
> print_regions_on() and can be obtained with extra flags.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8177959
>
> Webrev:
> http://cr.openjdk.java.net/~sjohanss/8177959/00/
>
Thanks for doing this cleanup. Looks good.

I can sponsor the change.

Cheers,
Stefan
> Testing:
> - JPRT
> - Manual check of output
>
> Thanks,
> Leo