RFR: 8273433: Enable parallelism in vmTestbase_nsk_sysdict tests

[David Holmes]

Hi Aleksey,

On 7/09/2021 11:24 pm, Aleksey Shipilev wrote:
> Current `vmTestbase_nsk_sysdict` suite contains about 20 tests, each running exclusively. There seem to be no reason to run them exclusively, though: they complete in reasonable time, are single-threaded, and consume the usual amount of memory.

I (or someone) will to need to check the history here. There's always a 
reason tests were set to run exclusively.

Thanks,
David

> 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.
> 
> Motivational performance improvements below.
> 
> Before:
> 
> 
> $ time CONF=linux-x86_64-server-fastdebug make run-test TEST=vmTestbase_nsk_sysdict | ts -s
> ...
> 00:45:14 ==============================
> 00:45:14 Test summary
> 00:45:14 ==============================
> 00:45:14    TEST                                              TOTAL  PASS  FAIL ERROR
> 00:45:14    jtreg:test/hotspot/jtreg:vmTestbase_nsk_sysdict      20    20     0     0
> 00:45:14 ==============================
> 00:45:14 TEST SUCCESS
> 00:45:14
> 00:45:15 Finished building target 'run-test' in configuration 'linux-x86_64-server-fastdebug'
> 
> real	45m14.839s
> user	149m49.850s
> sys	13m25.849s
> 
> 
> After:
> 
> 
> $ time CONF=linux-x86_64-server-fastdebug make run-test TEST=vmTestbase_nsk_sysdict | ts -s
> ...
> 00:03:25 ==============================
> 00:03:25 Test summary
> 00:03:25 ==============================
> 00:03:25    TEST                                              TOTAL  PASS  FAIL ERROR
> 00:03:25    jtreg:test/hotspot/jtreg:vmTestbase_nsk_sysdict      20    20     0     0
> 00:03:25 ==============================
> 00:03:25 TEST SUCCESS
> 00:03:25
> 00:03:25 Finished building target 'run-test' in configuration 'linux-x86_64-server-fastdebug'
> 
> real	3m24.702s
> user	119m7.488s
> sys	8m11.716s
> 
> -------------
> 
> Commit messages:
>   - Remove TEST.properties
> 
> Changes: https://git.openjdk.java.net/jdk/pull/5389/files
>   Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5389&range=00
>    Issue: https://bugs.openjdk.java.net/browse/JDK-8273433
>    Stats: 20 lines in 20 files changed: 0 ins; 20 del; 0 mod
>    Patch: https://git.openjdk.java.net/jdk/pull/5389.diff
>    Fetch: git fetch https://git.openjdk.java.net/jdk pull/5389/head:pull/5389
> 
> PR: https://git.openjdk.java.net/jdk/pull/5389
>