Re: [Development] Status of QtDeclarative on Windows?
Well it looks like the slowness I'm seeing is due to the rendering thread using all of the CPU. I tried toggling the nvidia driver settings for vsync and triple-buffering but that doesn’t change the behavior. Is there anything else I can try? Do other people see acceptable performance on Windows currently? -Todd -Original Message- From: development-bounces+todd.rose=nokia@qt-project.org [mailto:development-bounces+todd.rose=nokia@qt-project.org] On Behalf Of ext todd.r...@nokia.com Sent: Saturday, January 14, 2012 4:47 PM To: Storm-Olsen Marius (Nokia-MP/Austin); development@qt-project.org Subject: Re: [Development] Status of QtDeclarative on Windows? It seems equally slow when running debug and release libs, but will double check later this weekend to make sure it's not user-error. I think it has more to do with running with a video card that doesn't provide much (if any?) hardware acceleration. But I was assuming that even in that case that QML2 would be just as good as QML1. Clearly something is causing that to not be the case. What's the expectation when using video cards that don't offer OpenGL hardware acceleration? -Todd -Original Message- From: Storm-Olsen Marius (Nokia-MP/Austin) Sent: Saturday, January 14, 2012 9:12 AM To: development@qt-project.org; Rose Todd (Nokia-M/Alpharetta) Subject: Re: [Development] Status of QtDeclarative on Windows? Are you sure you are at least running the release version of your application? Debug version uses the debug CRT libs (and a debug Qt which does the same), so everything will be a lot slower than the end product. You cannot really evaluate performance with debug builds. -- Sent from my Nokia N9 On 1/13/12 23:12 ext todd.r...@nokia.com wrote: Just for fun I’ve been playing with a medium-sized QML app that we had written for 4.7/Symbian and porting it to Qt5/QML2. Mostly have been working on Linux but the past few days I finally got around to compiling Qt5 on Windows and playing around with the project enough so that it would compile and run under qmlscene (it’s mostly qml/js with a C++ plugin module as well). Anyway, the performance on my Windows box is horrible. ListView scrolling, image loading, animations, everything is like it’s running in quicksand. Is this expected? If not, what do I need to do to in order to troubleshoot? This machine is relatively old and has a crappy video card (older Nvidia Quadro), but it should be more than good enough to run this app smoothly. Any tips or tricks to enable extra debug tracing? Thanks, Todd ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
Re: [Development] Status of QtDeclarative on Windows?
Hi Todd, It looks like the qwindowsglcontext.cpp file does not request a swap interval of 1 anywhere, which would mean you have to pick the option always vsync, regardless of what application requests-option if such a thing exists. If you did this and it makes no difference then the driver is broken :) Another option is to disable the threaded renderer on windows using the environment variable QML_BAD_GUI_RENDER_LOOP, doing this would put it on par with X11/XCB. This is something we anyways need in order to support multiple toplevel QML windows as the current threaded implementation expects to block on a full buffer queue per window rather than swapBuffers to block immediately. The environment variable will switch to use the timer driven, GUI-only render loop. This also disables the vsync driven animations, but for a driver that ignores vsync, this is what we have to use. If we played nice, we would expose this behavior from the QPlatformIntegration / QPlatformGLContext so QtDeclarative could adapt properly, but we currently don't have API and implementation in place to catch this. cheers, Gunnar On Jan 16, 2012, at 1:45 AM, ext todd.r...@nokia.com wrote: Well it looks like the slowness I'm seeing is due to the rendering thread using all of the CPU. I tried toggling the nvidia driver settings for vsync and triple-buffering but that doesn’t change the behavior. Is there anything else I can try? Do other people see acceptable performance on Windows currently? -Todd -Original Message- From: development-bounces+todd.rose=nokia@qt-project.org [mailto:development-bounces+todd.rose=nokia@qt-project.org] On Behalf Of ext todd.r...@nokia.com Sent: Saturday, January 14, 2012 4:47 PM To: Storm-Olsen Marius (Nokia-MP/Austin); development@qt-project.org Subject: Re: [Development] Status of QtDeclarative on Windows? It seems equally slow when running debug and release libs, but will double check later this weekend to make sure it's not user-error. I think it has more to do with running with a video card that doesn't provide much (if any?) hardware acceleration. But I was assuming that even in that case that QML2 would be just as good as QML1. Clearly something is causing that to not be the case. What's the expectation when using video cards that don't offer OpenGL hardware acceleration? -Todd -Original Message- From: Storm-Olsen Marius (Nokia-MP/Austin) Sent: Saturday, January 14, 2012 9:12 AM To: development@qt-project.org; Rose Todd (Nokia-M/Alpharetta) Subject: Re: [Development] Status of QtDeclarative on Windows? Are you sure you are at least running the release version of your application? Debug version uses the debug CRT libs (and a debug Qt which does the same), so everything will be a lot slower than the end product. You cannot really evaluate performance with debug builds. -- Sent from my Nokia N9 On 1/13/12 23:12 ext todd.r...@nokia.com wrote: Just for fun I’ve been playing with a medium-sized QML app that we had written for 4.7/Symbian and porting it to Qt5/QML2. Mostly have been working on Linux but the past few days I finally got around to compiling Qt5 on Windows and playing around with the project enough so that it would compile and run under qmlscene (it’s mostly qml/js with a C++ plugin module as well). Anyway, the performance on my Windows box is horrible. ListView scrolling, image loading, animations, everything is like it’s running in quicksand. Is this expected? If not, what do I need to do to in order to troubleshoot? This machine is relatively old and has a crappy video card (older Nvidia Quadro), but it should be more than good enough to run this app smoothly. Any tips or tricks to enable extra debug tracing? Thanks, Todd ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
Re: [Development] Status of QtDeclarative on Windows?
Are you sure you are at least running the release version of your application? Debug version uses the debug CRT libs (and a debug Qt which does the same), so everything will be a lot slower than the end product. You cannot really evaluate performance with debug builds. -- Sent from my Nokia N9 On 1/13/12 23:12 ext todd.r...@nokia.com wrote: Just for fun I’ve been playing with a medium-sized QML app that we had written for 4.7/Symbian and porting it to Qt5/QML2. Mostly have been working on Linux but the past few days I finally got around to compiling Qt5 on Windows and playing around with the project enough so that it would compile and run under qmlscene (it’s mostly qml/js with a C++ plugin module as well). Anyway, the performance on my Windows box is horrible. ListView scrolling, image loading, animations, everything is like it’s running in quicksand. Is this expected? If not, what do I need to do to in order to troubleshoot? This machine is relatively old and has a crappy video card (older Nvidia Quadro), but it should be more than good enough to run this app smoothly. Any tips or tricks to enable extra debug tracing? Thanks, Todd ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
Re: [Development] Status of QtDeclarative on Windows?
It seems equally slow when running debug and release libs, but will double check later this weekend to make sure it's not user-error. I think it has more to do with running with a video card that doesn't provide much (if any?) hardware acceleration. But I was assuming that even in that case that QML2 would be just as good as QML1. Clearly something is causing that to not be the case. What's the expectation when using video cards that don't offer OpenGL hardware acceleration? -Todd -Original Message- From: Storm-Olsen Marius (Nokia-MP/Austin) Sent: Saturday, January 14, 2012 9:12 AM To: development@qt-project.org; Rose Todd (Nokia-M/Alpharetta) Subject: Re: [Development] Status of QtDeclarative on Windows? Are you sure you are at least running the release version of your application? Debug version uses the debug CRT libs (and a debug Qt which does the same), so everything will be a lot slower than the end product. You cannot really evaluate performance with debug builds. -- Sent from my Nokia N9 On 1/13/12 23:12 ext todd.r...@nokia.com wrote: Just for fun I’ve been playing with a medium-sized QML app that we had written for 4.7/Symbian and porting it to Qt5/QML2. Mostly have been working on Linux but the past few days I finally got around to compiling Qt5 on Windows and playing around with the project enough so that it would compile and run under qmlscene (it’s mostly qml/js with a C++ plugin module as well). Anyway, the performance on my Windows box is horrible. ListView scrolling, image loading, animations, everything is like it’s running in quicksand. Is this expected? If not, what do I need to do to in order to troubleshoot? This machine is relatively old and has a crappy video card (older Nvidia Quadro), but it should be more than good enough to run this app smoothly. Any tips or tricks to enable extra debug tracing? Thanks, Todd ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
[Development] Status of QtDeclarative on Windows?
Just for fun I've been playing with a medium-sized QML app that we had written for 4.7/Symbian and porting it to Qt5/QML2. Mostly have been working on Linux but the past few days I finally got around to compiling Qt5 on Windows and playing around with the project enough so that it would compile and run under qmlscene (it's mostly qml/js with a C++ plugin module as well). Anyway, the performance on my Windows box is horrible. ListView scrolling, image loading, animations, everything is like it's running in quicksand. Is this expected? If not, what do I need to do to in order to troubleshoot? This machine is relatively old and has a crappy video card (older Nvidia Quadro), but it should be more than good enough to run this app smoothly. Any tips or tricks to enable extra debug tracing? Thanks, Todd ___ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
