RFR: 8309130: x86_64 AVX512 intrinsics for Arrays.sort methods (int, long, float and double arrays) [v40]

[Srinivas Vamsi Parasa]

On Thu, 21 Sep 2023 16:44:52 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   change variable names of indexPivot* to pivotIndex*
>
> test/jdk/java/util/Arrays/Sorting.java line 30:
> 
>> 28:  * @build Sorting
>> 29:  * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:DisableIntrinsic=_arraySort,_arrayPartition, Sorting -shortrun
>> 30:  * @run main/othervm -XX:CompileThreshold=1 -XX:-TieredCompilation Sorting -shortrun
> 
> It would be useful to target the compilation threshold only for the intrinsic methods, but i suspect that is not possible?

Hi Paul,

Did some further study and found that it's possible to scale the compilation threshold only for the intrinsic methods (`sort `and `partition`)  using the `CompileCommand` and `CompileThersholdScaling` 

 ``` 
-XX:-TieredCompilation -XX:CompileCommand=CompileThresholdScaling,java.util.DualPivotQuicksort::sort,0.0001  -XX:CompileCommand=CompileThresholdScaling,java.util.DualPivotQuicksort::partition,0.0001


Will push this change along with build script change suggested by Magnus.

Thanks,
Vamsi

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/14227#discussion_r1333797193