RFR: 8233029: Obsolete flag GCTaskTimeStampEntries

[Kim Barrett]

> On Nov 21, 2019, at 1:12 PM, Leo Korinth <leo.korinth at oracle.com> wrote:
> 
> Hi,
> 
> When I changed ParallelGC to use WorkGangs instead of GCTasks, I unfortunately missed to remove (thereafter unused) command line option GCTaskTimeStampEntries. Here is a fix for that.
> 
> CSR:
> https://bugs.openjdk.java.net/browse/JDK-8234396
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8233029
> 
> Webrev:
> http://cr.openjdk.java.net/~lkorinth/8233029/00
> 
> Testing:
> tier 1-3
> 
> Thanks,
> Leo

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test/hotspot/jtreg/gc/parallel/TestPrintGCDetailsVerbose.java

With the removal of -XX:GCTaskTimeStampEntries=1 from the second @run
line, we now have two identical @run lines.

That second @run with the additional option was added by JDK-8177963
"Parallel GC fails fast when per-thread task log overflows".  Seems
like it's no longer relevant with the change to use WorkGang. So I
think the duplcate test can just be removed, rather than looking for
some other option(s) to make it different.

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Other than that, looks good.  I don't need a new webrev for removal of
the now duplicate test @run line.