RFR (S): 8245129: Enhance jstat gc option output and tests

[Daniil Titov]

Hi Paul,

The change looks good to me.

Thanks!
--Daniil


On 6/22/20, 8:48 AM, "serviceability-dev on behalf of Hohensee, Paul" <serviceability-dev-bounces at openjdk.java.net on behalf of hohensee at amazon.com> wrote:

    Thanks very much for review, Volker. I'll file a follow-up issue.

    One more reviewer, please? :)

    Paul

    On 6/22/20, 8:10 AM, "serviceability-dev on behalf of Volker Simonis" <serviceability-dev-bounces at openjdk.java.net on behalf of volker.simonis at gmail.com> wrote:

        Hi Paul,

        thanks for fixing jstat for larger heaps. I like that you've added
        explicit tests for ParallelGC which hasn't been tested since G1 was
        made the default collector.

        I also agree that sizes should all be right justified. I only wonder
        if the header of a right justified column shouldn't be right justified
        as well? However, taking into account that this already hasn't been
        handled consistently before your change, I'm fine to postpone that to
        a follow-up cleanup change.

        I think the change looks good so thumbs up from me.

        Thank you and best regards,
        Volker


        On Thu, Jun 18, 2020 at 11:53 PM Hohensee, Paul <hohensee at amazon.com> wrote:
        >
        > Ping. Any takers for this simple patch?
        >
        >
        >
        > Thanks,
        >
        > Paul
        >
        >
        >
        > From: serviceability-dev <serviceability-dev-bounces at openjdk.java.net> on behalf of "Hohensee, Paul" <hohensee at amazon.com>
        > Date: Monday, May 18, 2020 at 8:25 AM
        > To: serviceability-dev <serviceability-dev at openjdk.java.net>
        > Subject: RFR (S): 8245129: Enhance jstat gc option output and tests
        >
        >
        >
        > Please review an enhancement to the jstat gc option output to make the columns wider (for up to a 2TB heap) so one can read the output without going cross-eyed.
        >
        >
        >
        > Bug: https://bugs.openjdk.java.net/browse/JDK-8245129
        >
        > Webrev: http://cr.openjdk.java.net/~phh/8245129/webrev.00/
        >
        >
        >
        > I added tests using ParallelGC since the output can differ for non-G1 collectors. Successfully ran the test/hotspot/jtreg/serviceability/tmtools/jstat and test/jdk/sun/tools/jstat tests. A submit repo run had one failure
        >
        >
        >
        > runtime/MemberName/MemberNameLeak.java
        >
        > tier1
        >
        > macosx-x64-debug
        >
        >
        >
        > but rerunning it on my laptop succeeded, and there’s no connection between this test and my patch.
        >
        >
        >
        > Thanks,
        >
        > Paul
        >
        >
        >
        >