[jdk11u-dev] RFR: 8272720: Fix the implementation of loop unrolling heuristic with LoopPercentProfileLimit

[Christoph Langer]

On Fri, 5 Nov 2021 08:21:20 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> 8272720: Fix the implementation of loop unrolling heuristic with LoopPercentProfileLimit
>
>> /sponsor
> 
> Thanks @johnshajiang for your sponsoring.

> > The crash in GHA Windows build is a bit concerning... Maybe it's just infrastructure related, though. @DamonFool, could you check this?
> 
> Hi @RealCLanger ,
> 
> Thanks for your review.
> 
> The crash happened in `make` which shouldn't be caused by the hotspot code change.
> 
> ```
> /usr/bin/bash: line 1:  1076 Segmentation fault      (core dumped) /usr/bin/make -s -r -R -I /cygdrive/d/a/jdk11u-dev/jdk11u-dev/jdk/make/common SPEC=/cygdrive/d/a/jdk11u-dev/jdk11u-dev/jdk/build/windows-x64/spec.gmk MAKE_LOG_FLAGS="-s" -f ModuleWrapper.gmk -I/cygdrive/d/a/jdk11u-dev/jdk11u-dev/jdk/make -I/cygdrive/d/a/jdk11u-dev/jdk11u-dev/jdk/make/copy MODULE=java.base MAKEFILE_PREFIX=Copy
> ```
> 
> In theory, there is no risk for this backport. Thanks.

OK, yes, it must have been something in the environment. I just ran another GHA tests on a current branch which got past this step: https://github.com/RealCLanger/jdk11u-dev/actions/runs/1424808669

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PR: https://git.openjdk.java.net/jdk11u-dev/pull/588