[11u] RFR (XS): 8239466: Loss of precision in counter decay calculation in 11u backport of JDK-8237375

[Volker Simonis]

On Wed, Feb 19, 2020 at 4:26 PM Langer, Christoph
<christoph.langer at sap.com> wrote:
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> Hi,
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>
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> I have backported JDK-8237375 [0] [1] to jdk11u (11.0.7) with the change [2].
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> Unfortunately, the backport contains a flaw that leads to a loss of precision when checking whether a counter decay is needed in method is_decay_needed() which in turn might yield the same test failures that we wanted to fix. Please review the correction:
>

What a pity :(
Sorry that I missed that in the first review.

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> http://cr.openjdk.java.net/~clanger/webrevs/8239466.11u/src/hotspot/share/runtime/compilationPolicy.cpp.frames.html
>

Looks good now!

Thanks for fixing,
Volker


>
> Thanks
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> Christoph
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>
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> [0] https://bugs.openjdk.java.net/browse/JDK-8237375
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> [1] https://hg.openjdk.java.net/jdk/jdk/rev/2a0e2304e68b
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> [2] https://hg.openjdk.java.net/jdk-updates/jdk11u-dev/rev/695c552952bc
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>