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Geeks3D's GPU Tools / Re: Linux. Iris. Gputest gimark has unwanted black liquorice flakes
« Last post by JeGX on November 21, 2019, 07:19:12 PM »
The GpuTest project is a bit stopped so I can't update it easily. But GpuTest successor will be released shortly  :P

I can confirm you the bug is from GpuTest. I reproduced it with GeeXLab.  The bug comes from the two vec4 variables that are not initialized in the vertex shader and used in a division in the pixel shader. I tested on Linux Mint 19.2 + Intel UHD 630.

If you want to see the demo in action, download GeeXLab for Linux here:

Download the OpenGL 2.1 demopack here:

The demo is in the d07-meshes-bug-intel-gpu-linux-mesa/ folder. Launch GeeXLab and drag and drop the demo main.xml.

You should see something like this:
GeeXLab - GLSL bug on Intel GPU on Linux + Mesa driver

Now edit the vertex shader: d07-meshes-bug-intel-gpu-linux-mesa/shaders/tex_vs.txt

Comment the line 25 and remove the comment line 28:
Code: [Select]
// Bug on Linux with Intel GPUs + Mesa drivers
// = -;

// BugFix.
v_lightdir = LP - view_vertex;

You should see:
GeeXLab - GLSL bug on Intel GPU on Linux + Mesa driver

The un-initialized vec4 bug seems to be visible only on Intel Mesa driver. I tested and the bug is not visible on the following systems:
- Windows 10 + GeForce 444.20 + RTX 2070
- Windows 10 + Intel driver v7463 + UHD 630
- Raspberry Pi 4 + latest raspbian + Mesa 19.2.0 rc1  ;D

I hope that helps!

Geeks3D's GPU Tools / Re: Linux. Iris. Gputest gimark has unwanted black liquorice flakes
« Last post by JeGX on November 21, 2019, 01:19:32 PM »
Thanks for the feedback. I will try to do some tests asap (the vec4 lightDir0/1 that are not properly initialized) to confirm if it's a bug or not.
3D-Tech News Around The Web / The return of Multi-GPU with NVIDIA new CFR rendering mode
« Last post by JeGX on November 21, 2019, 01:14:53 PM »
NVIDIA is working on the return of multi-GPU rendering (upcoming dual-GPU board?) with a new technique called Checkered Frame Rendering or Checkboard Frame Rendering:


- Checkered Frame Rendering" or "Checkboard Frame Rendering" based on a checkerboard approach
- available for DirectX 10/11/12 (but not OpenGL & Volcano)
- requires NVLink
- currently only available for Turing-based nVidia graphics cards (with NVLink)
- currently only activatable by means of tools such as the nvidiaProfileInspector
- currently still plenty of compatibility issues
- because of the checkerboard approach, however, no micro-stuttering problems as in the AFR mode


NVIDIA CFR multi-GPU rendering technique
Geeks3D's GPU Tools / Linux. Iris. Gputest gimark has unwanted black liquorice flakes
« Last post by DenKos363 on November 21, 2019, 12:16:49 PM »
Hello folks. Recently we investigated issue with gimark test on iris driver and found out some image corruptions.
During researching it was found out, that the problem might be in gimark benchmark, not in driver. Could you please check out the issue and participate/help with sorting it out?

Thank you in advance! 
Geeks3D's GPU Tools / Re: Does of FurMark support nVidia Quadro RTX 3000?
« Last post by JeGX on November 20, 2019, 09:11:43 PM »
Released one hour ago  :P
Geeks3D's GPU Tools / FurMark 1.20.9 released
« Last post by JeGX on November 20, 2019, 09:11:04 PM »
A new maintenance version of FurMark has been released:

Version - 2019-11-20
+ added support of NVIDIA Quadro RTX 3000/4000/5000 Mobile,
  GeForce GTX 1650 Mobile, GeForce GTX 1660 Ti Mobile,
  GeForce RTX 2060/2070/2080 Mobile, Quadro T1000/T2000 Mobile,
  and AMD Radeon RX 5500.
* fixed fan speed reading on NVIDIA GPUs.
! updated: GPU Shark
! updated: GPU-Z 2.27
! updated: ZoomGPU 1.24.2 (GPU monitoring library)
3D-Tech News Around The Web / NVIDIA CUDA SDK 10.2
« Last post by Stefan on November 20, 2019, 08:55:06 PM »
The NVIDIA CUDA Toolkit provides a development environment for creating high performance GPU-accelerated applications.

Download now

Latest Release notes

At the same time Windows insiders receive R445 GeForce drivers with CUDA 11 support  ::)
3D-Tech News Around The Web / AMD μProf 3.2
« Last post by Stefan on November 20, 2019, 08:50:53 PM »
AMD μProf is a performance analysis tool for applications running on Windows and Linux operating systems. It allows developers to better understand the runtime performance of their application and to identify ways to improve its performance.

What’s New
  • Performance improvements
    • Faster raw profile data processing and reporting on Linux
    • Faster flame graph generation
    • Reduced memory consumption during data processing on Linux
  • New platform support
    • On Linux, CPU Profiling support for AMD EPYC 7002 processor, requires specific Linux distro and kernel version. Refer the Release Notes.
    • Power profiling support on headless 3rd Gen AMD Ryzen Desktop Processor.
  • New Flame Graph features
    • Visualize flame graph by sorting based on larger callstack
    • Navigation from flame graph to source view for functions having self-samples
  • GUI features
    • Simplified SETTINGS page by consolidating user settings under Preferences window
    • More options for Symbols settings
    • Scaled Thread Concurrency chart for higher core systems
    • New look “System-wide Power Profile (Live)” page
  • New Command line tool options
    • Capability to profile only the specific task.
Geeks3D's GPU Tools / Re: Does of FurMark support nVidia Quadro RTX 3000?
« Last post by ChiMiya on November 20, 2019, 02:57:56 AM »
Hi JeGX,

Thank you for the replied.

Would you please share the release schedule to us?
GeeXLab - english forum / GeeXLab released (Win64, Linux64, RPi)
« Last post by JeGX on November 19, 2019, 07:37:59 PM »
GeeXLab has been released for Windows 64-bit, Linux 64-bit and Raspbian Buster.

Release notes:


Version - 2019.11.18
+ (2019.11.18) added support of imGuIZMO-quat with a new function added in gh_imgui: imguizmoquat_gizmo3d_v1().
  Currently imGuIZMO-quat is only available on Windows platform because of a compilation failure on Linux.
* (2019.11.17) [Vulkan plugin] improved and fixed swapchain resize code.
+ (2019.11.17) added vk_swapchain_has_changed() to gh_renderer for Vulkan renderer.
+ (2019.11.17) added bind_v2(), unbind_v2() and execute_cmd_buffer_v2() to gh_render_target for Vulkan renderer.
* (2019.11.17) fixed a buffer overflow bug in gh_mesh.instancing_set_position_rotation().
! (2019.11.14) [FFmpeg plugin] added set_option_1i(), video_init_texture_yuv420() and video_update_texture_yuv420() to gh_av_lib.
! (2019.11.11) [FFmpeg plugin / Windows] updated with snapshot ffmpeg-20191111 (v4.2.1).
! (2019.11.09) [FFmpeg plugin] frame seeking didn't work correctly near the end of video.
! (2019.11.07) [FFmpeg plugin] frame seeking now works even if video is in pause.
! (2019.11.05) [FFmpeg plugin] updated gh_av.seek_frame_time(). Video and audio streams are no longer reset if seeking time is equal to 0.

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