Windows Hi-DPI

[Bogdan Ibanescu]

The point I'm trying to make is that if you're running a single threaded application, it'll use 1 core.

What you need to understand is that javafx does not magically figure out how organize rendering procedures across the systems' resources.

The reason for which whatever you're trying to test seems to be about as fast on your computer as it is on your wife's' is because it's most likely not multi-threaded, or plainly badly implemented.
Cross-fire and SLI and all that other crap is useless if you're only using 1% of your resources. All windows does when you select the GPU is the driver end-point. Activating it makes it run slightly faster because of the differences in hardware... but the lack of performance is the poor code in your software.

----- Original Message -----
From: "Felix Bembrick" <felix.bembrick at gmail.com>
To: "Bogdan Ibanescu" <bibanescu at montran.com>
Cc: "Chris Nahr" <chris.nahr at gmail.com>, openjfx-dev at openjdk.java.net
Sent: Friday, October 30, 2015 5:37:35 PM
Subject: Re: Windows Hi-DPI

Yes, but unless you are saying that having more cores, more VRAM, faster VRAM and a much faster clock speed are actually going to slow down the performance of JavaFX then I don't know what point you are trying to make.

> On 31 Oct 2015, at 01:03, Bogdan Ibanescu <bibanescu at montran.com> wrote:
> 
> Having 200 cores won't help you with anything unless you explicitly customize your code to make use of them.
> 
> ----- Original Message -----
> From: "Felix Bembrick" <felix.bembrick at gmail.com>
> To: "Chris Nahr" <chris.nahr at gmail.com>
> Cc: openjfx-dev at openjdk.java.net
> Sent: Friday, October 30, 2015 11:55:19 AM
> Subject: Re: Windows Hi-DPI
> 
> The NVIDIA Control Panel allowed me to disable SLI completely and I even rebooted.  I also upgraded to Java 8u72.
> 
> Sadly JavaFX still performs like a one-legged dog dragging a cannon ball on a chain.
> 
> All other 3D apps, games etc. perform blindingly fast as I would expect.
> 
> So, if it's not an SLI or driver problem, what is going on here (or not going on)?
> 
> Felix
> 
>> On 30 Oct 2015, at 19:47, Felix Bembrick <felix.bembrick at gmail.com> wrote:
>> 
>> That's curious. SLI is designed specifically with gamers in mind!
>> 
>> I'll investigating running without SLI and report back.
>> 
>> Felix 
>> 
>>> On 30 Oct 2015, at 19:44, Chris Nahr <chris.nahr at gmail.com> wrote:
>>> 
>>> If it's slower on an SLI machine than on an ordinary one then yes, I suspect JavaFX just can't handle SLI properly. Among gamers I've often heard that it's a notoriously problematic configuration. Can you switch your card to non-SLI mode and retest performance?
>>> 
>>> --Chris
>>> 
>>>> On 2015-10-30 09:19, Felix Bembrick wrote:
>>>> I am using Java 8u66 and performance is really poor.
>>>> 
>>>> I suspected a driver issue but I have the latest driver for my Titan X card (4 in SLI mode) and running the 4K monitor tests in 3DMark says my machine is in the top 1% fastest computers ever to run the tests.
>>>> 
>>>> It looks to me that JavaFX just can't deliver acceptable performance on 4K monitors, even with the most powerful graphics cards on the planet. Or maybe it doesn't support SLI?
>>>> 
>>>> It could be Windows 10 related but I don't think so. And I am definitely getting hardware acceleration according to the output so I suspect JavaFX has trouble moving so many pixels around on these hi-res monitors.
>>>> 
>>>> All other 3D apps and games run blindingly fast but JavaFX actually runs slower on this beast than on my wife's little i5 powered Dell machine with a low range graphics card, also running Windows 10.
>>>> 
>>>> Any ideas?
>>>> 
>>>> Felix
>>>> 
>>>>> On 30 Oct 2015, at 17:33, Chris Nahr<chris.nahr at gmail.com> wrote:
>>>>> 
>>>>> Hi-DPI is supported on Windows, assuming you have 8u60 or later (better 8u66 or later so a ComboBox doesn't freeze the application!). On my Dell XPS-15 with Windows 10 and 4K displays JavaFX also uses hardware acceleration, in this case with the Intel 4600 integrated GPU.
>>>>> 
>>>>> However, this causes frequent Intel display driver crashes and restarts because the Windows 10 drivers are still so immature. Same happens in WPF applications, so it's not specific to JavaFX. I've grabbed my driver directly from the Intel website. Possibly your system runs an older driver that causes JavaFX not to use HA.
>>>>> 
>>>>> Given how unstable it currently is on Windows 10, that might not be a bad idea. But of course you could try manually updating and see what happens to JavaFX performance.
>>>>> 
>>>>> Cheers, Chris
>>>>> 
>>>>> 
>>>>>> On 2015-10-28 17:24:38, Felix Bembrick <felix.bembrick at gmail.com> wrote:
>>>>>> I just installed JavaFX on my new Windows 10 machine which is extremely powerful but has two 4K monitors and while everything looks great and the right "size", the performance is very sluggish to say the least.
>>>>>> 
>>>>>> Is this because Hi-DPI is not yet supported in JavaFX on Windows?
>>>>>> 
>>>>>> Thanks,
>>>>>> 
>>>>>> Fix
>>>>> 
> 
> -- 
> Best Regards, 
> -- Bogdan Marius Ibanescu 
> -- Montran Corporation - Branch of Cluj-Napoca 
> 

-- 
Best Regards, 
-- Bogdan Marius Ibanescu 
-- Montran Corporation - Branch of Cluj-Napoca