Integrated: 8311178: JMH tests don't scale well when sharing output buffers

[Swati Sharma]

On Sat, 1 Jul 2023 07:53:17 GMT, Swati Sharma <duke at openjdk.org> wrote:

> The below benchmark files have scaling issues due to cache contention and leads to poor scaling when run on multiple threads. The patch sets the scope from benchmark level to thread level to fix the issue:
> - org/openjdk/bench/java/io/DataOutputStreamTest.java
> - org/openjdk/bench/java/lang/ArrayCopyObject.java
> - org/openjdk/bench/java/lang/ArrayFiddle.java
> - org/openjdk/bench/java/time/format/DateTimeFormatterBench.java
> - org/openjdk/bench/jdk/incubator/vector/IndexInRangeBenchmark.java
> - org/openjdk/bench/jdk/incubator/vector/MemorySegmentVectorAccess.java
> - org/openjdk/bench/jdk/incubator/vector/StoreMaskedBenchmark.java
> - org/openjdk/bench/jdk/incubator/vector/StoreMaskedIOOBEBenchmark.java
> - org/openjdk/bench/vm/compiler/ArrayFill.java
> - org/openjdk/bench/vm/compiler/IndexVector.java
> 
> Also removing the static scope for variables in org/openjdk/bench/jdk/incubator/vector/VectorFPtoIntCastOperations.java for better scaling.
> 
> Please review and share your feedback.
> 
> Thanks,
> Swati

This pull request has now been integrated.

Changeset: a03a3a43
Author:    Swati Sharma <swati.sharma at intel.com>
Committer: Sandhya Viswanathan <sviswanathan at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/a03a3a43bb16ddc7df78f64e07db823224bde6fb
Stats:     17 lines in 12 files changed: 0 ins; 0 del; 17 mod

8311178: JMH tests don't scale well when sharing output buffers

Co-authored-by: Vladimir Ivanov <vaivanov at openjdk.org>
Reviewed-by: ecaspole, sviswanathan, mli

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PR: https://git.openjdk.org/jdk/pull/14746