diff options
Diffstat (limited to 'indra/llwindow')
| -rw-r--r-- | indra/llwindow/llwindowwin32.cpp | 55 |
1 files changed, 40 insertions, 15 deletions
diff --git a/indra/llwindow/llwindowwin32.cpp b/indra/llwindow/llwindowwin32.cpp index 20443988ab..656439e71e 100644 --- a/indra/llwindow/llwindowwin32.cpp +++ b/indra/llwindow/llwindowwin32.cpp @@ -414,6 +414,7 @@ struct LLWindowWin32::LLWindowWin32Thread : public LL::ThreadPool HWND mWindowHandle = NULL; HDC mhDC = 0; + // best guess at available video memory in MB std::atomic<U32> mAvailableVRAM; IDXGIAdapter3* mDXGIAdapter = nullptr; @@ -4644,44 +4645,68 @@ void LLWindowWin32::LLWindowWin32Thread::updateVRAMUsage() LL_PROFILE_ZONE_SCOPED; if (mDXGIAdapter != nullptr) { + // NOTE: what lies below is hand wavy math based on compatibility testing and observation against a variety of hardware + // It doesn't make sense, but please don't refactor it to make sense. -- davep + DXGI_QUERY_VIDEO_MEMORY_INFO info; mDXGIAdapter->QueryVideoMemoryInfo(0, DXGI_MEMORY_SEGMENT_GROUP_LOCAL, &info); - // try to use no more than the available reserve minus 10% - U32 target = info.Budget / 1024 / 1024; +#if 0 // debug 0 budget and 0 CU + info.Budget = 0; + info.CurrentUsage = 0; +#endif + + U32 budget_mb = info.Budget / 1024 / 1024; + U32 afr_mb = info.AvailableForReservation / 1024 / 1024; + // correct for systems that misreport budget + if (budget_mb == 0) + { + // fall back to available for reservation clamped between 512MB and 2GB + budget_mb = llclamp(afr_mb, (U32) 512, (U32) 2048); + } + + U32 cu_mb = info.CurrentUsage / 1024 / 1024; + + // get an estimated usage based on texture bytes allocated + U32 eu_mb = LLImageGL::getTextureBytesAllocated() * 2 / 1024 / 1024; - // EXPERIMENTAL - // Trying to zero in on a good target usage, code here should be tuned against observed behavior - // of various hardware. - if (target > 4096) // if 4GB are installed, try to leave 2GB free + if (cu_mb == 0) + { // current usage is sometimes unreliable on Intel GPUs, fall back to estimated usage + cu_mb = llmax((U32)1, eu_mb); + } + F32 eu_error = (F32)((S32)eu_mb - (S32)cu_mb) / (F32)cu_mb; + + U32 target_mb = info.Budget / 1024 / 1024; + + if (target_mb > 4096) // if 4GB are installed, try to leave 2GB free { - target -= 2048; + target_mb -= 2048; } else // if less than 4GB are installed, try not to use more than half of it { - target /= 2; + target_mb /= 2; } - U32 used_vram = info.CurrentUsage / 1024 / 1024; - - mAvailableVRAM = used_vram < target ? target - used_vram : 0; + mAvailableVRAM = cu_mb < target_mb ? target_mb - cu_mb : 0; LL_INFOS("Window") << "\nLocal\nAFR: " << info.AvailableForReservation / 1024 / 1024 << "\nBudget: " << info.Budget / 1024 / 1024 << "\nCR: " << info.CurrentReservation / 1024 / 1024 - << "\nCU: " << info.CurrentUsage / 1024 / 1024 << LL_ENDL; + << "\nCU: " << info.CurrentUsage / 1024 / 1024 + << "\nEU: " << eu_mb << llformat(" (%.2f)", eu_error) + << "\nTU: " << target_mb + << "\nAM: " << mAvailableVRAM << LL_ENDL; - mDXGIAdapter->QueryVideoMemoryInfo(0, DXGI_MEMORY_SEGMENT_GROUP_NON_LOCAL, &info); + /*mDXGIAdapter->QueryVideoMemoryInfo(0, DXGI_MEMORY_SEGMENT_GROUP_NON_LOCAL, &info); LL_INFOS("Window") << "\nNon-Local\nAFR: " << info.AvailableForReservation / 1024 / 1024 << "\nBudget: " << info.Budget / 1024 / 1024 << "\nCR: " << info.CurrentReservation / 1024 / 1024 - << "\nCU: " << info.CurrentUsage / 1024 / 1024 << LL_ENDL; + << "\nCU: " << info.CurrentUsage / 1024 / 1024 << LL_ENDL;*/ } else if (mD3DDevice != NULL) { // fallback to D3D9 mAvailableVRAM = mD3DDevice->GetAvailableTextureMem() / 1024 / 1024; } - } void LLWindowWin32::LLWindowWin32Thread::run() |