RFR: 8272970: Parallelize runtime/InvocationTests/

[David Holmes]

On Wed, 25 Aug 2021 11:58:27 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Current runtime/InvocationTests/ are long and serial. They take about half an hour on a modern desktop, mostly using a single CPU. They can be parallelized better, at least on sub-test level. This would be important as [JDK-8272914](https://bugs.openjdk.java.net/browse/JDK-8272914) would start to run them in tier3.
> 
> Sample run times:
> 
> 
> $ time CONF=linux-x86_64-server-fastdebug make run-test TEST=runtime/InvocationTests/
> 
> # Before
> real	32m2.188s
> user	59m12.818s
> sys	0m45.612s
> 
> # After
> real	17m21.110s
> user	63m31.851s
> sys	0m55.391s
> 
> 
> I think we can technically go even deeper, for example parallelising by `packageSet` in the generators themselves, but that would be much more intrusive. I think 17 minutes is already quite good, given other tests running in prospective `hotspot:tier3`.

Marked as reviewed by dholmes (Reviewer).

Hi Aleksey,

I can't find any jtreg documentation that indicates that multiple @test entries within a single Java file will be run concurrently. ??

That aside the split you have done seem quite reasonable.

Thanks,
David

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PR: https://git.openjdk.java.net/jdk/pull/5250