RFR: Add diagnostic flag to disable inline assembler write barrier

[Aleksey Shipilev]

On 08/31/2017 08:02 PM, Roman Kennke wrote:
> Am 31.08.2017 um 19:33 schrieb Aleksey Shipilev:
>> On 08/31/2017 07:15 PM, Roman Kennke wrote:
>>> This patch adds a (diagnostic) flag to disable the inline assembler
>>> write barrier code. This should enable to measure the performance impact
>>> of it.
>>>
>>> http://cr.openjdk.java.net/~rkennke/disableasmwb/webrev.00/
>>
>> We should avoid "Disable" options that yield double negations like -XX:-ShenandoahDisableAsmWB.
>> Otherwise seems fine.
>>
>> Thanks,
>> -Aleksey
>>
> 
> Right. Like this?
> 
> http://cr.openjdk.java.net/~rkennke/disableasmwb/webrev.01/

Yes.

-Aleksey