Integrated: 8316142: Enable parallelism in vmTestbase/nsk/monitoring/stress/lowmem tests

[Aleksey Shipilev]

On Tue, 12 Sep 2023 19:20:16 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Similar to [JDK-8315437](https://bugs.openjdk.org/browse/JDK-8315437), current vmTestbase/nsk/monitoring/stress/lowmem tests contains 36 tests, each running exclusively. This drags the tier4 test times up. There seem to be no reason to run these tests exclusively, though: they complete in reasonable time, are moderately-threaded, and consume the usual amount of memory.
> 
> We should consider enabling parallelism for them and get improved test performance. Currently it is blocked by TEST.properties with exclusiveAccess.dirs directives in them.
> 
> Current run on 18-core machine:
>  6385.39s user 8568.61s system 1308% cpu 19:02.97 total
> 
> Fully parallel:
>  3885.67s user 295.13s system 2772% cpu 2:30.77 total 
> 
> Additional testing:
>  - [x] 100x Linux x86_64 fastdebug, `vmTestbase/nsk/monitoring/stress/lowmem`

This pull request has now been integrated.

Changeset: 4421951d
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/4421951d8f1c6fb16255851a803252fe96a453e5
Stats:     828 lines in 36 files changed: 0 ins; 828 del; 0 mod

8316142: Enable parallelism in vmTestbase/nsk/monitoring/stress/lowmem tests

Reviewed-by: lmesnik, cjplummer

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PR: https://git.openjdk.org/jdk/pull/15689