What is the priority of the JavaFX thread?

[Richard Bair]

I think maybe there are similar manifestations from different sources. I agree timers, vsync, etc are likely the cause of much of the current stutter. However thread priorities could also be responsible for decreased frame rate when the system is under load (depends more on the OS thread scheduling and interaction with the VM I think).

On Dec 6, 2012, at 2:06 PM, Kevin Rushforth <kevin.rushforth at oracle.com> wrote:

> I doubt this is related to thread priorities, but it would be worth verifying. More likely it's the interaction of thread scheduling, timers, and vsync.
> 
> -- Kevin
> 
> 
> Richard Bair wrote:
>> 
>> I don't *think* we set any thread priorities. I have tried different thread priorities in apps in the past (such as lowering the priority of background threads) and it didn't make a difference. I should look at the concurrent APIs in javaFX and see if they still set the thread priority…in fact it does. But I haven't noticed any app behavior that changed by doing so. But I haven't tried to set the thread priority from anywhere but within Java, and I'm on a mac, so maybe it works differently (although I am pretty certain I've talked to VM engineers who have said thread priorities are ignored on HotSpot).
>> 
>> Richard
>> 
>> On Dec 6, 2012, at 12:41 PM, Randahl Fink Isaksen <randahl at wefend.com> wrote:
>> 
>>   
>>> Does JavaFX intentionally set a priority for the JavaFX thread? I would very much like to hear what the decision behind setting or not setting such a priority is.
>>> 
>>> The reason I am asking is, on my development Mac, it seems the JavaFX thread is easily starved by other CPU load, and I was thinking if the developers of JavaFX did or did not expect application developers to manage JavaFX thread priority.
>>> 
>>> Thanks
>>> 
>>> Randahl
>>>     
>> 
>>