[aarch64-port-dev ] RFR: 8186671: Use `yield` instruction in SpinPause on linux-aarch64

[Dmitry Chuyko]

On 08/24/2017 06:33 PM, Dmitry Chuyko wrote:
> On 08/23/2017 10:39 PM, White, Derek wrote:
>> Hi Andrew,
>>
>>> -----Original Message-----
>>> From: aarch64-port-dev [mailto:aarch64-port-dev-
>>> bounces at openjdk.java.net] On Behalf Of Andrew Haley
>>> Sent: Wednesday, August 23, 2017 12:32 PM
>>> To: aarch64-port-dev at openjdk.java.net
>>> Subject: Re: [aarch64-port-dev ] RFR: 8186671: Use `yield` 
>>> instruction in
>>> SpinPause on linux-aarch64
>>>
>>> On 23/08/17 17:07, Dmitry Chuyko wrote:
>>>> Please review a change in SpinPause implementation.
>>>>
>>>> related study:
>>>> http://cr.openjdk.java.net/~dchuyko/8186670/yield/spinwait.html
>>>> rfe: https://bugs.openjdk.java.net/browse/JDK-8186671
>>>> webrev: http://cr.openjdk.java.net/~dchuyko/8186671/webrev.00/
>>>>
>>>> The function was moved to platform .S file and now contains yield
>>>> instruction.
>>> ..........................................................................................................................................
>>>
>>> In any case we
>>>> Re the use of yield in SpinPause(): this looks correct to me.  OK.
> Good. This part seemed more scaring.
There were no objections to this part (extern). I need sponsorship to 
push the change.

It would be interesting to discuss the other (intrinsic) part a bit more 
at fireside chat.

-Dmitry
>
> -- 
> Dmitry
>>>
>>> -- 
>>> Andrew Haley
>>> Java Platform Lead Engineer
>>> Red Hat UK Ltd. <https://www.redhat.com>
>>> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
>