RFR: [11, 10, 8]: Disable evac assist by default until bugfixes arrive

[Zhengyu Gu]

Okay.

-Zhengyu

On 08/23/2018 12:17 PM, Aleksey Shipilev wrote:
> Testing discovered the intermittent bug in evac assist code. I have a bugfix for sh/jdk, currently
> in stress testing. Until we get another bunch of backports integrated, it makes sense to disable it
> in backport repos. I am going to do this in all backports at once.
> 
> diff -r af8ae6c1be4e src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp
> --- a/src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp    Wed Aug 22 23:17:47 2018 +0200
> +++ b/src/hotspot/share/gc/shenandoah/shenandoah_globals.hpp    Thu Aug 23 18:14:56 2018 +0200
> @@ -100,5 +100,5 @@
>             "concurrent evacuation. Possible values: 'on', 'off', 'adaptive'")\
>                                                                               \
> -  experimental(uintx, ShenandoahEvacAssist, 10,                             \
> +  experimental(uintx, ShenandoahEvacAssist, 0,                              \
>             "How many objects to evacuate on WB assist path. "                \
>             "Use zero to disable.")                                           \
> 
> Testing: misbehaving tests
> 
> Thanks,
> -Aleksey
>