Hi Phil,
Thank you for the comments. Actually, the battery life is not the only issue
that experience our customers. I am getting crash reports that are reproducible
only with discrete cards on MBP. Some users report hangs with discrete cards.
All this issues are eliminated by switching on the integrated GPU. I am not
sure, that discrete card gives significant performance improvement in jdk
implementation. Other applications, like Chrome, use discrete video card only
for WebGl or similar tasks.
Thank you,
Denis
> 27 мая 2015 г., в 21:09, Phil Race <philip.r...@oracle.com> написал(а):
>
> I suppose that NSOpenGLPFAAllowOfflineRenderers must prevent whatever
> 'tickling'
> of the discrete GPU we do from automatically making it the active GPU ?
>
> This seems to merit a source code comment as at face value it seems like an
> API that allows
> you to use that (other) discrete GPU alongside the active GPU, but so we don't
> need that part, just the side-effect behaviour.
>
> But do we want this fix in this form ? The integrated GPU is going to perform
> far less well
> than the discrete GPU. If the issue is battery life, then perhaps it should
> be tied
> to whether we are running on battery or mains power. And then perhaps you
> need to figure out
> how to switch GPU on the fly when you go from mains to battery.
>
>
> -phil.
>
>
>
>> On 05/27/2015 08:08 AM, Denis Fokin wrote:
>> Hi, Sergey,
>>
>> Basically, you should close all apps that can switch the vc including the
>> utility for switching video cards. Make sure in About This Mac -> Displays
>> that the integrated card is enabled. Start an application with the patched
>> version of Java. Check About This Mac -> Displays. Integrated video card
>> should be still active.
>>
>>
>>
>>> 27 мая 2015 г., в 17:30, Sergey Bylokhov <sergey.bylok...@oracle.com>
>>> написал(а):
>>>
>>> Hi, Denis.
>>> Can you describe the steps on how to test it. On my mac it still change the
>>> vc.
>>>
>>>> On 27.05.15 17:16, Denis Fokin wrote:
>>>> Please review the fix for jdk9
>>>>
>>>> The fix allows do not force discrete video card usage on MacBook Pro
>>>> models with two video cards. I have tested the fix on several MPBs.
>>>>
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8041900
>>>> Webrev: http://cr.openjdk.java.net/~denis/8041900/webrev.00
>>>> <http://cr.openjdk.java.net/%7Edenis/8041900/webrev.00>
>>>
>>> --
>>> Best regards, Sergey.
>
