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New texture memory scheme

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This commit is contained in:
Brad Davis 2016-10-20 16:59:40 -07:00
parent b5881146df
commit 7900fd3e18
1 changed files with 10 additions and 38 deletions
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48
libraries/gpu-gl/src/gpu/gl/GLTexture.cpp
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@ -18,22 +18,6 @@ using namespace gpu::gl;
std::shared_ptr<GLTextureTransferHelper> GLTexture::_textureTransferHelper;
// FIXME placeholder for texture memory over-use
#define DEFAULT_MAX_MEMORY_MB 256
#define OVER_MEMORY_PRESSURE 2.0f
// FIXME other apps show things like Oculus home consuming large amounts of GPU memory
// which causes us to blur textures needlessly (since other app GPU memory usage will likely
// be swapped out and not cause any actual impact
//#define CHECK_MIN_FREE_GPU_MEMORY
#ifdef CHECK_MIN_FREE_GPU_MEMORY
#define MIN_FREE_GPU_MEMORY_PERCENTAGE 0.25f
#endif
// Allow 65% of all available GPU memory to be consumed by textures
// FIXME overly conservative?
#define MAX_CONSUMED_TEXTURE_MEMORY_PERCENTAGE 0.65f
const GLenum GLTexture::CUBE_FACE_LAYOUT[6] = {
GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
@ -105,37 +89,25 @@ const std::vector<GLenum>& GLTexture::getFaceTargets(GLenum target) {
return faceTargets;
}
// Default texture memory = GPU total memory - 2GB
#define GPU_MEMORY_RESERVE_BYTES MB_TO_BYTES(2048)
// Minimum texture memory = 1GB
#define TEXTURE_MEMORY_MIN_BYTES MB_TO_BYTES(1024)
float GLTexture::getMemoryPressure() {
// Check for an explicit memory limit
auto availableTextureMemory = Texture::getAllowedGPUMemoryUsage();
// If no memory limit has been set, use a percentage of the total dedicated memory
if (!availableTextureMemory) {
auto totalGpuMemory = getDedicatedMemory();
if (!totalGpuMemory) {
// If we can't query the dedicated memory just use a fallback fixed value of 256 MB
totalGpuMemory = MB_TO_BYTES(DEFAULT_MAX_MEMORY_MB);
auto totalMemory = getDedicatedMemory();
if ((GPU_MEMORY_RESERVE_BYTES + TEXTURE_MEMORY_MIN_BYTES) > totalMemory) {
availableTextureMemory = TEXTURE_MEMORY_MIN_BYTES;
} else {
#ifdef CHECK_MIN_FREE_GPU_MEMORY
// Check the global free GPU memory
auto freeGpuMemory = getFreeDedicatedMemory();
if (freeGpuMemory) {
static gpu::Size lastFreeGpuMemory = 0;
auto freePercentage = (float)freeGpuMemory / (float)totalGpuMemory;
if (freeGpuMemory != lastFreeGpuMemory) {
lastFreeGpuMemory = freeGpuMemory;
if (freePercentage < MIN_FREE_GPU_MEMORY_PERCENTAGE) {
qCDebug(gpugllogging) << "Exceeded min free GPU memory " << freePercentage;
return OVER_MEMORY_PRESSURE;
}
}
}
#endif
availableTextureMemory = totalMemory - GPU_MEMORY_RESERVE_BYTES;
}
availableTextureMemory = static_cast<gpu::Size>(totalGpuMemory * MAX_CONSUMED_TEXTURE_MEMORY_PERCENTAGE);
}
// Return the consumed texture memory divided by the available texture memory.