RFR (XS) 8241534: Shenandoah: region status should include update watermark

[Roman Kennke]

Indeed. Looks good!

Thank you!
Roman

Am 24.03.20 um 18:08 schrieb Aleksey Shipilev:
> RFE:
>   https://bugs.openjdk.java.net/browse/JDK-8241534
> 
> Fix:
> 
> diff -r b58660116a42 src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp        Tue Mar 24 17:49:58 2020 +0100
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp        Tue Mar 24 18:04:13 2020 +0100
> @@ -992,5 +992,5 @@
>    st->print_cr("EU=empty-uncommitted, EC=empty-committed, R=regular, H=humongous start,
> HC=humongous continuation, CS=collection set, T=trash, P=pinned");
>    st->print_cr("BTE=bottom/top/end, U=used, T=TLAB allocs, G=GCLAB allocs, S=shared allocs, L=live
> data");
> -  st->print_cr("R=root, CP=critical pins, TAMS=top-at-mark-start (previous, next)");
> +  st->print_cr("R=root, CP=critical pins, TAMS=top-at-mark-start, UWM=update watermark");
>    st->print_cr("SN=alloc sequence number");
> 
> diff -r b58660116a42 src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Tue Mar 24 17:49:58 2020 +0100
> +++ b/src/hotspot/share/gc/shenandoah/shenandoahHeapRegion.cpp  Tue Mar 24 18:04:13 2020 +0100
> @@ -414,4 +414,6 @@
>    st->print("|TAMS " INTPTR_FORMAT_W(12),
>              p2i(_heap->marking_context()->top_at_mark_start(const_cast<ShenandoahHeapRegion*>(this))));
> +  st->print("|UWM " INTPTR_FORMAT_W(12),
> +            p2i(_update_watermark));
>    st->print("|U " SIZE_FORMAT_W(5) "%1s", byte_size_in_proper_unit(used()),
> proper_unit_for_byte_size(used()));
>    st->print("|T " SIZE_FORMAT_W(5) "%1s", byte_size_in_proper_unit(get_tlab_allocs()),
> proper_unit_for_byte_size(get_tlab_allocs()));
> 
> Testing: hotspot_gc_shenandoah, eyeballing artificially triggered hs_errs
>