On Thu, 2 Dec 2021 20:43:56 GMT, Vamsi Parasa <d...@openjdk.java.net> wrote:
>> This change optimizes random number generators using
>> Math.unsignedMultiplyHigh()
>
> Vamsi Parasa has updated the pull request incrementally with one additional
> commit since the last revision:
>
> add seeds for the random generators to eliminate run-to-run variance
Looks good. Some comments on the benchmark.
test/micro/org/openjdk/bench/java/util/RandomGeneratorNext.java line 57:
> 55: rngL128X128MixRandom =
> RandomGeneratorFactory.of("L128X128MixRandom").create(42);
> 56: rngL128X256MixRandom =
> RandomGeneratorFactory.of("L128X256MixRandom").create(174);
> 57: rngL128X1024MixRandom =
> RandomGeneratorFactory.of("L128X1024MixRandom").create(308);
You can declare parameters:
@Param({"L128X128MixRandom", "L128X256MixRandom", "L128X1024MixRandom"})
String randomGeneratorName;
@Param("1024")
int size;
long[] buffer;
RandomGenerator randomGenerator;
@Setup
public void setup() {
buffer = new long[size];
randomGenerator = RandomGeneratorFactory.of(randomGeneratorName)
.create(randomGeneratorName.hashCode());
}
Then you can simplify to just two benchmark methods. Further, the benchmark can
be used for other PRNGs.
-------------
PR: https://git.openjdk.java.net/jdk/pull/6206
