hg: jdk9/hs-rt/hotspot: 8067341: Modify PLAB sizing algorithm to waste less

[thomas.schatzl at oracle.com]

Changeset: be685a5356a4
Author:    tschatzl
Date:      2015-09-01 10:53 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/be685a5356a4

8067341: Modify PLAB sizing algorithm to waste less
Summary: Change the G1 PLAB resizing algorithm to waste less memory by being more conservative about the PLAB sizes.
Reviewed-by: ecaspole, jmasa

! src/share/vm/gc/g1/g1EvacStats.cpp
! src/share/vm/gc/g1/g1_globals.hpp