[vectorIntrinsics] RFR: 8263149: Adding some algorithms optimized by Vector API into JMH benc…

[Ningsheng Jian]

On Mon, 8 Mar 2021 03:31:38 GMT, Wang Zhuo <wzhuo at openjdk.org> wrote:

> Here are some code samples for panama-vector vectorIntrinsics JMH benchmarks. 
> These code were developed during our work on optimizing Alibaba applications with Vector API.
> VectorDistance contains Cosine distance and Euclidean distance, scalar code from 
> https://github.com/opendistro-for-elasticsearch/k-NN/blob/aa5d1d40b136e2b3d33a14e80a2a374b2be015f9/src/main/java/com/amazon/opendistroforelasticsearch/knn/plugin/script/KNNScoringUtil.java#L61
> In many scenarios, ElasticSearch engineers reported more than 4X E2E speedup using Vector API.
> 
> BooleanArrayCheck and ValueRangeCheckAndCastL2I were from OLAP applications.
> 
> Co-authored-by: Joshua Zhu <jzhu at openjdk.org>

Some more nits on style.

test/jdk/jdk/incubator/vector/benchmark/src/main/java/benchmark/bigdata/ValueRangeCheckAndCastL2I.java line 32:

> 30: import jdk.incubator.vector.VectorShape;
> 31: import jdk.incubator.vector.VectorSpecies;
> 32: import jdk.incubator.vector.VectorOperators;

Order the imports alphabetically?

test/jdk/jdk/incubator/vector/benchmark/src/main/java/benchmark/bigdata/VectorDistance.java line 125:

> 123:         xSquareV = FloatVector.zero(SPECIES);
> 124:         ySquareV = FloatVector.zero(SPECIES);;
> 125:         int i= 0;

whitespace between i=

test/jdk/jdk/incubator/vector/benchmark/src/main/java/benchmark/bigdata/VectorDistance.java line 149:

> 147:         xSquareV = FloatVector.zero(SPECIES);
> 148:         ySquareV = FloatVector.zero(SPECIES);;
> 149:         int i= 0;

whitespace between 'i='. Here and other methods with "i=". :-)

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

PR: https://git.openjdk.java.net/panama-vector/pull/45