Re: [osg-users] EditorConfig file?
Hi, It's been a couple of weeks, and I've not had any response about any official policy on indentation in the case of existing files that already break the global rule. Should I just go for the stance of "it's supposed to be spaces for everything except for files that are already entirely tabs"? Thank you! Cheers, Chris -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75761#75761 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CPU Performance issues with AMD 2700 vs Intel Corei7 4770S
I don't have any modern Apples to Apples comparisons to cite. I do know, that if you recall, we ran into threading issues when dealing with the massive plenoptic display IG back in 2015 or so on AMD cards, and it needed special assistance from AMD to unclog it. Do you know Graham Sellers at AMD? Maybe we could get some advising from him. On Mon, Apr 1, 2019 at 2:59 PM Robert Osfield wrote: > Hi All, > > I have recently got a new dev machine, a AMD2700 + Geforce 2060 > system. I wanted a quiet mulit-core system as well as to get some > experiment working with AMD chips as I've been using Intel Corei7 > chips for the last 8 years. The machine uses passive cooling for > everything except the graphics card so it's soo quiet you hardly know > it's on :-) > > I've begun performance testing and was expecting most improvements > across the board for single threaded tasks, and big improvement on > highly threaded tasks like building. I expected this based on a > number of online performance comparisons. For example: > > > https://cpu.userbenchmark.com/Compare/Intel-Core-i7-4770S-vs-AMD-Ryzen-7-2700/m2123vs3957 > > http://hwbench.com/cpus/amd-ryzen-7-2700-vs-intel-core-i7-4770s > > When using the OSG I'm seeing lower framerates for almost all the test > models I regularly use, in particular the cull traversal can be 20-40% > slower. > > Doing synthetic OSG + VSG scene graph creation, traversal tests shows > the OSG 32% slower on the AMD (running osggroups from the osg2vsg > project) while the equivalent VSG test is ~14% faster on the AMD > (running vsgvisitor from the vsgExamples project). > > Looking at the Linux perf stat utility it looks like the OSG runs for > AMD run are hitting up against 498 context-switches for the run of > osggroups, while the Intel just sees 24 context switches. Branch > misses are 0.66% on AMD vs 0.37% on Intel. Instructions per cycle are > all worse on the AMD too, 0.72 (AMD) vs 0.95 (Intel) > instrictions/cycle > > The same equivalent tests with the VSG shows that the AMD has 56 > context switches vs 2 on the Intel. Branch misses are also still > higher on the AMD, but the instructions per cycle are now 2.13 (AMD) > vs 1.96 (Intel) instructions/cycle. > > Another way of presenting this data, this OSG vs VSG tests runs a > testing of creation 11 deep quad tree, traversing every node in the > graph 10 times, then destroying the graph: > > VSG Intel 0.615 secs (VSG 6.33 x faster than OSG) > OSG Intel 3.895 secs > > VSG AMD 0.555 secs (VSG 9.36 x faster than OSG) > OSG AMD 5.196 secs > > > Despite the raw creation, traversals and destruction being quicker on > the AMD with the VSG, the VSG framerates on scenes are worse on the > AMD vs Intel though, except where the 2060's better fill rate gives it > advantage. Even when I take the VSG's traversals out of the equation > and just submitted the same command graph to render each frame the > frame rate is worse on the AMD vs Intel system, suggesting it's not > just the slower traversals that is at issue - the Vulkan driver and > hardware look to be struggling as well. > > The two systems aren't identical software wise, the Intel system in on > Kubuntu 18.04 with gcc 7.3.0 vs Kubuntu 18.10 with gcc 8.2.0. The > Intel system has NVidia 396.54.09 vs AMD system with NVidia 415.27. > > I wouldn't have thought the OS, compile and drivers to make such stark > differences in performance. The VSG's lighterweight design does seem > to help reduce the impact a bit and for some tests gives the AMD an > advantage, but it's still overall slower on the AMD. The OSG sees a > huge hit on complex scenes on the AMD system. > > So I'm perplexed what might be going on. The perf stat report > suggests that the AMD is running at around 3.9-4GHz vs Intel running > at 3.8 to 3.GHz. The perf stat results suggests that certain > workloads are really messing up the AMD's chip ability to efficiently > handle the load. > > On one upside, the AMD's 8 cores/16 threads vs Intel's 4cores/8 > threads certainly helps when compiling the OSG, but this is small > comfort as my job is far more focused on optimizing real-time > rendering performance than just getting code compiled. > > I'd really like some feedback from the community as to what might be > going wrong on my AMD system. Are others seeing significantly slower > CPU performance on AMD vs Intel for certain tasks? > > Any suggestions as what tests to do next? What to tweak? > > Cheers, > Robert. > > I have > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Training • Consulting • Contracting 3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL Legal/IP • Forensics • Imaging • UAVs • GIS • GPS •
[osg-users] CPU Performance issues with AMD 2700 vs Intel Corei7 4770S
Hi All, I have recently got a new dev machine, a AMD2700 + Geforce 2060 system. I wanted a quiet mulit-core system as well as to get some experiment working with AMD chips as I've been using Intel Corei7 chips for the last 8 years. The machine uses passive cooling for everything except the graphics card so it's soo quiet you hardly know it's on :-) I've begun performance testing and was expecting most improvements across the board for single threaded tasks, and big improvement on highly threaded tasks like building. I expected this based on a number of online performance comparisons. For example: https://cpu.userbenchmark.com/Compare/Intel-Core-i7-4770S-vs-AMD-Ryzen-7-2700/m2123vs3957 http://hwbench.com/cpus/amd-ryzen-7-2700-vs-intel-core-i7-4770s When using the OSG I'm seeing lower framerates for almost all the test models I regularly use, in particular the cull traversal can be 20-40% slower. Doing synthetic OSG + VSG scene graph creation, traversal tests shows the OSG 32% slower on the AMD (running osggroups from the osg2vsg project) while the equivalent VSG test is ~14% faster on the AMD (running vsgvisitor from the vsgExamples project). Looking at the Linux perf stat utility it looks like the OSG runs for AMD run are hitting up against 498 context-switches for the run of osggroups, while the Intel just sees 24 context switches. Branch misses are 0.66% on AMD vs 0.37% on Intel. Instructions per cycle are all worse on the AMD too, 0.72 (AMD) vs 0.95 (Intel) instrictions/cycle The same equivalent tests with the VSG shows that the AMD has 56 context switches vs 2 on the Intel. Branch misses are also still higher on the AMD, but the instructions per cycle are now 2.13 (AMD) vs 1.96 (Intel) instructions/cycle. Another way of presenting this data, this OSG vs VSG tests runs a testing of creation 11 deep quad tree, traversing every node in the graph 10 times, then destroying the graph: VSG Intel 0.615 secs (VSG 6.33 x faster than OSG) OSG Intel 3.895 secs VSG AMD 0.555 secs (VSG 9.36 x faster than OSG) OSG AMD 5.196 secs Despite the raw creation, traversals and destruction being quicker on the AMD with the VSG, the VSG framerates on scenes are worse on the AMD vs Intel though, except where the 2060's better fill rate gives it advantage. Even when I take the VSG's traversals out of the equation and just submitted the same command graph to render each frame the frame rate is worse on the AMD vs Intel system, suggesting it's not just the slower traversals that is at issue - the Vulkan driver and hardware look to be struggling as well. The two systems aren't identical software wise, the Intel system in on Kubuntu 18.04 with gcc 7.3.0 vs Kubuntu 18.10 with gcc 8.2.0. The Intel system has NVidia 396.54.09 vs AMD system with NVidia 415.27. I wouldn't have thought the OS, compile and drivers to make such stark differences in performance. The VSG's lighterweight design does seem to help reduce the impact a bit and for some tests gives the AMD an advantage, but it's still overall slower on the AMD. The OSG sees a huge hit on complex scenes on the AMD system. So I'm perplexed what might be going on. The perf stat report suggests that the AMD is running at around 3.9-4GHz vs Intel running at 3.8 to 3.GHz. The perf stat results suggests that certain workloads are really messing up the AMD's chip ability to efficiently handle the load. On one upside, the AMD's 8 cores/16 threads vs Intel's 4cores/8 threads certainly helps when compiling the OSG, but this is small comfort as my job is far more focused on optimizing real-time rendering performance than just getting code compiled. I'd really like some feedback from the community as to what might be going wrong on my AMD system. Are others seeing significantly slower CPU performance on AMD vs Intel for certain tasks? Any suggestions as what tests to do next? What to tweak? Cheers, Robert. I have ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] FPS camera
Hello. I looked for a ready to use FPS camera, but figured out, that it's really hard to do. So after some searching i found on the forum good example (thanks to Styx (Kazim Kamilov)) and did some work on it. So, here is primitive version of FPS camera if someone look for it: https://github.com/Ligvest/OSG_Learning/tree/master/FPS%20CameraManipulator%20And%20Skybox Here is original version of this manipulator from Styx (Kazim Kamilov): http://forum.openscenegraph.org/viewtopic.php?p=75757 Cheers, Anatoly -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75758#75758 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Free camera manipulator
Styx (Kazim Kamilov), Thank you very match. I looked for the camera, like you provided here. Thank you! Cheers, Anatoly -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75757#75757 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] First Person Camera disable inertial rotation
Ok. On the forum i found post, where is answer that provide a solution i want, but i didn't test it due i found whole FPS camera. Here's the post : http://forum.openscenegraph.org/viewtopic.php?t=15493 Cheers, Anatoly -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75756#75756 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to hide mouse cursor?
Ok. On the forum i found a post, where is answer that provide a solution i want, but i didn't test it due i found whole FPS camera. Here's the post : http://forum.openscenegraph.org/viewtopic.php?t=15493 Cheers, Anatoly -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75755#75755 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
