GPU hang appears when trying to render scene to FBO (framebuff=
er object) with
attached texture with resident handle, but if all the handles of attached
texture are not reesident (or if there is no handles), hang disappears. For
example this pseudocode causes GPU hang:
GLuint renderbufId;
glCreateRenderbuffers(1, &renderbufId);
glNamedRenderbufferStorage(renderbufId, GL_DEPTH_COMPONENT, width(),
height());
GLuint texId;
glCreateTextures(GL_TEXTURE_2D, 1, &texId);
glTextureStorage2D(texId, 1, GL_RGBA8, width(), height());
GLuint64 handle =3D glGetTextureHandleARB(texId);
glMakeTextureHandleResidentARB(handle);
glBindFramebuffer(GL_FRAMEBUFFER, fboID);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texId, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, rboId);
//render some triangles
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//render main scene
glSwapBuffers();
And this not:
GLuint renderbufId;
glCreateRenderbuffers(1, &renderbufId);
glNamedRenderbufferStorage(renderbufId, GL_DEPTH_COMPONENT, width(),
height());
GLuint texId;
glCreateTextures(GL_TEXTURE_2D, 1, &texId);
glTextureStorage2D(texId, 1, GL_RGBA8, width(), height());
GLuint64 handle =3D glGetTextureHandleARB(texId);
std::cout << handle << std::endl; //prevent optimizing out
glBindFramebuffer(GL_FRAMEBUFFER, fboID);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texId, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, rboId);
//render some triangles
glBindFramebuffer(GL_FRAMEBUFFER, 0);
//render main scene
glSwapBuffers();
I can try to write full cpp sample for exposing the hang, if it's needed. T=
here
is already open source graphic engine (my "pet" project) affected=
by the hang,
but code is quite complex (https://gitlab.com/KawaiiGraphics/Kawaii3D
https://gitlab.com/K=
awaiiGraphics/Misaka3D ;=20
workaround added in commit b53d98dacff2b0392c2143c8901289e93ddd8623, so only
previous versions are affected).
My hardware:
APU: AMD Ryzen 5 2400G (with integrated GPU Radeon Vega 11 Graphics)
System board: MSI AM4 X470 Gaming Pro
RAM: Goodram Iridium 16Gb (8+8 Gb dual-channel 2800MHz)