JEP 158 support for JIT

[Yasumasa Suenaga]

Hi Chris,

Thank you for your information.

IMHO, LogCompilation is too difficult to migrate to UL.
So I think we should implement basic (?) JIT logs at first.

I uploaded patches for using UL. Please see them.

   http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2017-January/025267.html


Thanks,

Yasumasa


On 2017/01/04 17:02, Chris Newland wrote:
> Hi Yasumasa-san, all,
>
> I'm also very interested in changes to JIT logging (I'm the author of the
> JITWatch tool [1] for visualising JIT-compiler decisions).
>
> JITWatch consumes the LogCompilation (XML) output which contains more
> detail (escape analysis etc.) and better contextualisation (inlining
> chains etc.) than the tty-based Print* outputs.
>
> I had a brief discussion on how LogCompilation/UL would interact back in
> Sep 2015:
> http://mail.openjdk.java.net/pipermail/hotspot-dev/2015-September/019788.html
> and John Rose left this comment on the JEP
> https://bugs.openjdk.java.net/browse/JDK-8046148#comment-13568278 but as
> far as I can tell there is no plan to migrate LogCompilation to UL yet.
>
> Kind regards,
>
> Chris
>
> [1] https://github.com/AdoptOpenJDK/jitwatch
>
> On Tue, January 3, 2017 04:08, Yasumasa Suenaga wrote:
>> Thanks Vladimir,
>>
>>
>>> Definitely not in JDK 9. And I can't say when it could be done or done
>>> at all.
>>
>> I hope this feature will be implemented ASAP.
>>
>>
>>
>> Yasumasa
>>
>>
>>
>> On 2017/01/03 12:00, Vladimir Kozlov wrote:
>>
>>> On 1/2/17 6:33 PM, Yasumasa Suenaga wrote:
>>>
>>>> Hi all,
>>>>
>>>>
>>>> Java 9 has JEP 158: Unified JVM Logging.
>>>> This JEP describes that existing 'tty->print...' logging should use
>>>> unified logging as output. However, C2 compiler does not seem to use
>>>> it.
>>>>
>>>> Do you have any plan to use JEP 158 in JIT codes?
>>>>
>>>
>>> Definitely not in JDK 9. And I can't say when it could be done or done
>>> at all.
>>>
>>> Regards,
>>> Vladimir
>>>
>>>
>>>>
>>>> I uploaded Unified JVM logging viewer to GitHub [1].
>>>> I want to draw chart(s) or list all JIT'ed methods on it if possible.
>>>> (Especially I want to get log from PrintCompilation and
>>>> PrintIntrinsics through Unified JVM logging)
>>>>
>>>>
>>>>
>>>> Thanks,
>>>>
>>>>
>>>> Yasumasa
>>>>
>>>>
>>>>
>>>> [1] https://github.com/YaSuenag/ulviewer
>>>>
>>>>
>>
>
>