** Summary changed:
- [gallium] EGL clients that saturate the GPU cause the Mir server to slow,
freeze and stutter, showing very few frames
+ [gallium] EGL clients using a gallium driver (radeon, nouveau, freedreno)
that saturate the GPU cause the Mir server to slow, freeze and stutter,
displaying very few frames
** Also affects: mesa (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1211700
Title:
[gallium] EGL clients using a gallium driver (radeon, nouveau,
freedreno) that saturate the GPU cause the Mir server to slow, freeze
and stutter, displaying very few frames
Status in Mir:
Confirmed
Status in mesa package in Ubuntu:
New
Bug description:
GPU-heavy clients on Mesa gallium drivers (e.g. radeon, nouveau and
freedreno) cause the Mir server to slow, sometimes to a halt. This is
seen as a frozen screen, unable to move surfaces, or unable to switch
VTs (for a while).
For example:
mir_demo_client_egltriangle -n
mir_demo_client_eglplasma -n
The -n flag (swapinterval = 0) seems to cause the client to overload
the mir server to the point where it cannot render physical frames
very often.
$ es2_info
EGL_VERSION = 1.4 (Gallium)
EGL_VENDOR = Mesa Project
EGL_EXTENSIONS = EGL_WL_bind_wayland_display EGL_KHR_image_base
EGL_KHR_image_pixmap EGL_KHR_image EGL_KHR_reusable_sync EGL_KHR_fence_sync
EGL_KHR_surfaceless_context EGL_NOK_swap_region EGL_NV_post_sub_buffer
EGL_CLIENT_APIS = OpenGL OpenGL_ES OpenGL_ES2 OpenVG
GL_VERSION: OpenGL ES 3.0 Mesa 9.2.0-devel
GL_RENDERER: Gallium 0.4 on AMD CEDAR
...
$ es2_info
EGL_VERSION = 1.4 (Gallium)
EGL_VENDOR = Mesa Project
EGL_EXTENSIONS = EGL_WL_bind_wayland_display EGL_KHR_image_base
EGL_KHR_image_pixmap EGL_KHR_image EGL_KHR_reusable_sync EGL_KHR_fence_sync
EGL_KHR_surfaceless_context EGL_NOK_swap_region EGL_NV_post_sub_buffer
EGL_CLIENT_APIS = OpenGL OpenGL_ES OpenGL_ES2 OpenVG
GL_VERSION: OpenGL ES 3.0 Mesa 9.2.0-devel
GL_RENDERER: Gallium 0.4 on NVA8
...
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