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GPU monitoring of RAM available when allocating FBO

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Warning when allocation of FBO is critical.
This commit is contained in:
Bruno Herbelin
2022-04-16 01:31:09 +02:00
parent 0f4076acab
commit 739559783b
1 changed files with 82 additions and 7 deletions
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89
FrameBuffer.cpp
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@@ -31,6 +31,14 @@
#include <stb_image.h>
#include <stb_image_write.h>
#ifndef NDEBUG
//#define FRAMEBUFFER_DEBUG
#endif
#define GL_GPU_MEM_INFO_TOTAL_AVAILABLE_MEM_NVX 0x9048
#define GL_GPU_MEM_INFO_CURRENT_AVAILABLE_MEM_NVX 0x9049
#define GL_TEXTURE_FREE_MEMORY_ATI 0x87FC
const char* FrameBuffer::aspect_ratio_name[5] = { "4:3", "3:2", "16:10", "16:9", "21:9" };
glm::vec2 FrameBuffer::aspect_ratio_size[5] = { glm::vec2(4.f,3.f), glm::vec2(3.f,2.f), glm::vec2(16.f,10.f), glm::vec2(16.f,9.f) , glm::vec2(21.f,9.f) };
const char* FrameBuffer::resolution_name[5] = { "720", "1080", "1200", "1440", "2160" };
@@ -131,15 +139,19 @@ void FrameBuffer::init()
// attach the 2D texture to intermediate FBO (intermediate_framebufferid_)
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureid_, 0);
// Log::Info("New FBO %d Multi Sampling ", framebufferid_);
#ifdef FRAMEBUFFER_DEBUG
g_printerr("New FBO %d Multi Sampling ", framebufferid_);
#endif
}
else {
// direct attach the 2D texture to FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureid_, 0);
// Log::Info("New FBO %d Single Sampling ", framebufferid_);
#ifdef FRAMEBUFFER_DEBUG
g_printerr("New FBO %d Single Sampling ", framebufferid_);
#endif
}
checkFramebufferStatus();
@@ -157,6 +169,11 @@ FrameBuffer::~FrameBuffer()
glDeleteTextures(1, &textureid_);
if (intermediate_textureid_)
glDeleteTextures(1, &intermediate_textureid_);
#ifdef FRAMEBUFFER_DEBUG
GLint framebufferMemoryInKB = ( width() * height() * 5 ) / 1024;
g_printerr("Framebuffer deleted %d x %d, %d kB freed\n", width(), height(), framebufferMemoryInKB);
#endif
}
@@ -329,10 +346,68 @@ void FrameBuffer::checkFramebufferStatus()
Log::Warning(" GL_FRAMEBUFFER_UNDEFINED​ is returned if target​ is the default framebuffer, but the default framebuffer does not exist.");
break;
case GL_FRAMEBUFFER_COMPLETE:
//#ifndef NDEBUG
// g_print("Framebuffer created %d x %d\n", width(), height());
//#endif
break;
{
static int meminfomode = -1;
// first time check which way to get memory info
if (meminfomode<0) {
meminfomode = 0;
GLint numExtensions = 0;
glGetIntegerv( GL_NUM_EXTENSIONS, &numExtensions );
for (int i = 0; i < numExtensions; ++i){
const GLubyte *ccc = glGetStringi(GL_EXTENSIONS, i);
if ( strcmp( (const char*)ccc, "GL_NVX_gpu_memory_info") == 0 ){
meminfomode = 1;
break;
}
else if ( strcmp( (const char*)ccc, "GL_ATI_meminfo") == 0 ){
meminfomode = 2;
break;
}
}
}
GLint framebufferMemoryInKB = ( width() * height() * 5 ) / 1024;
// NVIDIA
if (meminfomode == 1) {
static GLint nTotalMemoryInKB = -1;
if (nTotalMemoryInKB<0)
glGetIntegerv( GL_GPU_MEM_INFO_TOTAL_AVAILABLE_MEM_NVX, &nTotalMemoryInKB );
GLint nCurAvailMemoryInKB = 0;
glGetIntegerv( GL_GPU_MEM_INFO_CURRENT_AVAILABLE_MEM_NVX, &nCurAvailMemoryInKB );
if ( nCurAvailMemoryInKB < framebufferMemoryInKB )
Log::Warning("Cannot allocate frame buffer: only %d kB GPU RAM remaining on the %d kB available (%d %%).",
nCurAvailMemoryInKB, nTotalMemoryInKB, int(float(nCurAvailMemoryInKB) / float(nTotalMemoryInKB) * 100.f ) );
#ifdef FRAMEBUFFER_DEBUG
else
g_printerr("Framebuffer created %d x %d, %d kB allocated (%d kB remaining on %d kB)\n", width(), height(), framebufferMemoryInKB, nCurAvailMemoryInKB, nTotalMemoryInKB);
#endif
}
// ATI
else if (meminfomode == 2) {
GLint nCurAvailMemoryInKB = 0;
glGetIntegerv( GL_TEXTURE_FREE_MEMORY_ATI, &nCurAvailMemoryInKB );
if ( nCurAvailMemoryInKB < framebufferMemoryInKB )
Log::Warning("Cannot allocate frame buffer: only %d kB GPU RAM remaining.", nCurAvailMemoryInKB );
#ifdef FRAMEBUFFER_DEBUG
else
g_printerr("Framebuffer created %d x %d, %d kB allocated (%d kB remaining)\n", width(), height(), framebufferMemoryInKB, nCurAvailMemoryInKB);
#endif
}
#ifdef FRAMEBUFFER_DEBUG
else
g_printerr("Framebuffer created %d x %d, %d kB allocated\n", width(), height(), framebufferMemoryInKB);
#endif
}
break;
}
}