JavaFX Application Heat up MacBook Pro

[Scott Palmer]

This must be something else then.  How many cores are on the that MacBook? I’m thinking maybe there are four cores and 25% CPU could indicate that there is one thread stuck in a busy loop.  That could explain the heat.

Do you have any animations running?  A static application just sitting there shouldn’t have noticeable CPU usage. I have tons of stuff running now, not JavaFX though, and CPU usage is around 2%.
What is the minimal application that exhibits the issue?

Scott


> On Mar 25, 2016, at 6:15 PM, Tai Hu <tai.hu at veroanalytics.com> wrote:
> 
> I have a MacBook Pro 13 inch (2014 model). If I remembered correctly, it
> only has an integrated GPU. There is no discreet GPU
> 
> Thanks,
> 
> Tai
> 
> On Friday, March 25, 2016, Phil Race <philip.race at oracle.com> wrote:
> 
>> 
>> 
>> See https://developer.apple.com/library/mac/qa/qa1734/_index.html
>> It is mentioned in (one of) the bugs you can get to if you follow the JBS
>> bug trail
>> 
>> -phil.
>> 
>> On 3/25/2016 2:48 PM, Tai Hu wrote:
>> 
>>> Thanks for the info. What entry should I put into info.plist?
>>> 
>>> Thanks
>>> 
>>> On Friday, March 25, 2016, Kevin Rushforth <kevin.rushforth at oracle.com>
>>> wrote:
>>> 
>>> Yes, 8u77 has the FX fix for this issue:
>>>> 
>>>> https://bugs.openjdk.java.net/browse/JDK-8132775
>>>> 
>>>> However, due to the way Apple chose to enable this, you will need to
>>>> package your application with the appropriate entry in the Info.plist
>>>> file.
>>>> 
>>>> The equivalent AWT fix --
>>>> https://bugs.openjdk.java.net/browse/JDK-8041900
>>>> -- is fixed in 8u92 which is scheduled to be released next month.
>>>> 
>>>> -- Kevin
>>>> 
>>>> 
>>>> Tai Hu wrote:
>>>> 
>>>> I am on the latest 8u77.
>>>>> 
>>>>> On Friday, March 25, 2016, Scott Palmer <swpalmer at gmail.com> wrote:
>>>>> 
>>>>> 
>>>>> 
>>>>> What version of JavaFX are you running?
>>>>>> There is a known issue, where JavaFX (and AWT/Swing) trigger activation
>>>>>> of
>>>>>> the discreet GPU.  I believe for FX the issue has been resolved in the
>>>>>> latest version, but the equivalent AWT fix hasn't made it to a released
>>>>>> version yet.
>>>>>> 
>>>>>> Scott
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> On Mar 25, 2016, at 4:12 PM, Tai Hu <tai.hu at veroanalytics.com
>>>>>>> 
>>>>>>> 
>>>>>>> <javascript:;>> wrote:
>>>>>> 
>>>>>> 
>>>>>> My JavaFX application runs fine on a Windows box with less than 10% of
>>>>>>> 
>>>>>>> 
>>>>>>> CPU usage. However, if I run the same application on a MacBook Pro 13
>>>>>> inch
>>>>>> (Laptop monitor, no external monitor). About 30 seconds after I
>>>>>> launched
>>>>>> application, MacBook cooling fan will kick in and running high, just a
>>>>>> few
>>>>>> minutes later, laptop is too hot to put directly on your lap. Actually
>>>>>> I
>>>>>> tried Ensemble app, which has exactly same issue. Few minutes after
>>>>>> launch,
>>>>>> fan kicks in and laptop become hot. I put my application under VisualVM
>>>>>> and
>>>>>> also checked Mac Activity Monitor, based on the number both of them
>>>>>> show
>>>>>> the CPU usage is not extremely high and average out about 25% and
>>>>>> sometimes
>>>>>> spike to 40%. But entire machine heats up. Almost all of our Mac
>>>>>> clients
>>>>>> complained about this issue to us. Does anyone could shield some light
>>>>>> on
>>>>>> this issue?
>>>>>> 
>>>>>> 
>>>>>> Thanks,
>>>>>>> 
>>>>>>> Tai