June 29, 2017
Debugging graphics performance in a simple and high-level manner is possible for all Gallium based Mesa drivers.
GALLIUM_HUD is a feature that adds performance graphs to applications that describe various aspects like FPS, CPU usage, etc in realtime.
It is enabled using an environment variable, GALLIUM_HUD, that can be set for GL/EGL/etc applications. It only works for Mesa drivers that are Gallium based, which means that the most drivers (with the notable exception of some Intel drivers) support GALLIUM_HUD.
See GALLIUM_HUD options:
export GALLIUM_HUD=help glxgears
If you're building Android, you can supply system-wide environment values by doing an export in the init.rc file of the device you are using, like this.
# Go to android source code checkout cd android # Add export to init.rc (linaro/generic is the device I use) nano device/linaro/generic/init.rc export GALLIUM_HUD cpu,cpu0+cpu1+cpu2+cpu3;pixels-rendered,fps,primitives-generated
If you're using one of the usual Linux distros, GALLIUM_HUD can be enabled by setting the environtment variable in a place that it loaded early.
# Add export to /etc/environment nano /etc/environment export GALLIUM_HUD cpu,cpu0+cpu1+cpu2+cpu3;pixels-rendered,fps,primitives-generated
This post has been a part of work undertaken by my employer Collabora.
Syzkaller is much needed tool for Linux kernel testing and debugging. With some work, it can also be enhanced to find bugs in specific drivers,…
Previously, we discussed about how Rust can be a great language for embedded programming. In this article, we'll explain an easy setup to…
Adaptive streaming is a technique to provide flexibility and scalability by offering variable bit-rate streams to the client. Here's a quick…
With only free software, a Mali G31 chip can now run Wayland compositors with zero-copy graphics, including GNOME 3. We can run every scene…
Device drivers can support more revisions and SoC platforms by abstracting away specific hardware interface layouts. Let's examine a specific…
gst-build is one of the main build systems used by the community to develop the GStreamer platform. In my last blog post, I presented gst-build…