The main goal is to reduce time in GDI callback (PresentDisplayOnly) and avoid situation when the processing takes more than 2 seconds causing class driver watchdog.
1. We offload sending of drawable commands to separate thread (waiting for room in command ring may take unpredictable time) 2. In case the usage of device memory is high, allocation of bitmap for rectangle to draw also may take unpredictable time (note that single full screen redraw requires >3 MB of space) We make drawable objects allocation from GDI callback fast and non-forced and in case they fail we provide alternate allocation from OS heap 3. The thread before it sends drawable command down takes care on objects that were allocated from OS heap and allocates them from device memory (forced, as now we are not limited by time) 4. We still do not enable VSync automatically, but this can be done for evaluation/testing purpose via setting in the driver's registry Changes from V2: Fixed coding style Added checks for allocation result (patch 1) Removed duplicated code (patch 2) Splitted commit of non-forced bitmap allocation (patches 4-5) Added reduced processing in thread after PnP stop received (patch 6) Extended commit comment (patch 6) Other cosmetic changes Changes from V1: Changed allocations style and coding style Removed additional synchronization on deallocation upon allocation failure Removed waiting for thread start on driver startup Other cosmetic changes [email protected] (3): qxl-wddm-dod: Prepare for failure to allocate memory qxl-wddm-dod: PutBytesAlign supports non-forced allocation qxl-wddm-dod: Optimize allocation of memory chunks qxl-wddm-dod: Dedicated procedure for bitmap creation qxl-wddm-dod: Implement non-forced bitmap allocation qxl-wddm-dod: Non-forced memory allocations with VSync qxldod/QxlDod.cpp | 390 ++++++++++++++++++++++++++++++++++++++++++------------ qxldod/QxlDod.h | 18 ++- 2 files changed, 324 insertions(+), 84 deletions(-) -- 2.7.0.windows.1 _______________________________________________ Spice-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/spice-devel
