RFR (S) 8241740: Shenandoah: remove ShenandoahHeapRegion::_heap
Aleksey Shipilev
shade at redhat.com
Fri Mar 27 13:38:57 UTC 2020
RFE:
https://bugs.openjdk.java.net/browse/JDK-8241740
It is not seem to worth it to drag the _heap field in every region. Almost all the places where it
is used is not performance-critical, and ShenandoahHeap::heap() is actually as fast, especially
after JDK-8241743. Ditching this field saves 8 bytes per region.
I had to move seqnum_last_alloc_mutator to avoid including shenandoahHeap.inline.hpp in a generic
header.
Webrev:
https://cr.openjdk.java.net/~shade/8241740/webrev.02/
Testing: hotspot_gc_shenandoah, eyeballing shenandoahHeapRegion.o objdumps
--
Thanks,
-Aleksey
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