RFR(S): 8184271: Time related C1 intrinsics produce inconsistent results when floating around

[Tobias Hartmann]

Thanks Vladimir!

Best regards,
Tobias

On 13.07.2017 17:40, Vladimir Kozlov wrote:
> Good.
> 
> Thanks,
> Vladimir K
> 
> On 7/13/17 7:24 AM, Tobias Hartmann wrote:
>> Hi,
>>
>> please review the following patch:
>> https://bugs.openjdk.java.net/browse/JDK-8184271
>> http://cr.openjdk.java.net/~thartmann/8184271/webrev.00/
>>
>> The problem is that the C1 intrinsics for System.nanoTime(), System.currentTimeMillis() and JVM.counterTime() are not pinned and may produce inconsistent results when floating around (see tests). The solution is to not unpin them.
>>
>> Thanks to Vladimir I. for the analysis!
>>
>> Tested with JPRT and RBT (running).
>>
>> Thanks,
>> Tobias
>>