RFR: 8210416: [linux] Poor StrictMath performance due to non-optimized compilation

Erik Joelsson erik.joelsson at oracle.com
Tue Sep 11 15:57:44 UTC 2018

Hello Severin,

Even if using the macro, I still think you need to add a condition on 
the compiler types where the switch can be reasonably expected to exist.


On 2018-09-11 05:02, Severin Gehwolf wrote:
> On Mon, 2018-09-10 at 09:29 -0700, Erik Joelsson wrote:
>> I see. I was not aware of that issue, but we clearly need to file a bug
>> for it and fix it. In this case I think it's fine to us the macro however.
> OK. Update webrev, which now uses FLAGS_COMPILER_CHECK_ARGUMENTS.
> http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8210416/webrev.04/
> Micro-benchmark results from running [1] for x86_64 and ppc64le are
> here (-O2 is sufficient it seems):
> http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8210416/microbenchmarks_results/
> More thoughts?
> Thanks,
> Severin
> [1] https://github.com/gromero/strictmath/

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