[Spice-devel] [PATCH 00/12] Set of patches for further support of VSync

[Yuri Benditovich]

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)
   So, we make drawable objects allocation from GDI callaback fast and non-forced and in case they
   fail we provide alternate allocation from OS heap
3. The thread before send drawable command shall take care on these objects that was allocated from
   OS heap and allocate them from device memory (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

Yuri Benditovich (12):
  qxl-wddm-dod: Prepare system thread for rendering
  qxl-wddm-dod: Use rendering offload thread
  qxl-wddm-dod: Introduce TimeMeasurement class for timing debugging
  qxl-wddm-dod: Debug warning on long wait on event
  qxl-wddm-dod: Reduce amount of unnecessary printouts
  qxl-wddm-dod: Registry-based control over VSync
  qxl-wddm-dod: Set VSync indication period to 200ms
  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: Implement non-forced bitmap allocation
  qxl-wddm-dod: Non-forced memory allocations with VSync

 qxldod/QxlDod.cpp | 581 +++++++++++++++++++++++++++++++++++++++++++++---------
 qxldod/QxlDod.h   |  87 +++++++-
 qxldod/driver.cpp |  35 ++++
 3 files changed, 606 insertions(+), 97 deletions(-)

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2.7.0.windows.1