Would like to ask ping for review patch set v2. thanks very much. BRs, Xiaolin On 10/19/2018 03:27 PM, Zhang, Xiaolin wrote: > To improve GVTg performance, it could reduce the mmio access trap > numbers within guest driver in some certain scenarios since mmio > access trap will introuduce vm exit/vm enter cost. > > the solution in this patch set is to setup a shared memory region > which accessed both by guest and GVTg without trap cost. the shared > memory region is allocated by guest driver and guest driver will > pass the region's memory guest physical address to GVTg through > PVINFO register and later GVTg can access this region directly without > trap cost to achieve data exchange purpose between guest and GVTg. > > in this patch set, 3 kind of pvmmio optimization implemented which is > controlled by enable_pvmmio PVINO register with different level flag. > 1. workload submission (context submission): reduce 4 traps to 1 trap. > 2. master irq: reduce 2 traps to 1 trap. > 3. ppgtt update: eliminate the cost of ppgtt write protection. > > based on the experiment, the performance was gained 4 percent (average) > improvment with regard to both media and 3D workload benchmarks. > > based on the pvmmio framework, it could achive more sceneario optimization > such as globle GTT update, display plane and water mark update with guest. > > v0: RFC patch set > v1: addressed RFC review comments > v2: addressed v1 review comments, added pv callbacks for pv operations > > Xiaolin Zhang (5): > drm/i915: introduced pv capability for vgpu > drm/i915: get ready of memory for pvmmio > drm/i915: context submission pvmmio optimization > drm/i915: master irq pvmmio optimization > drm/i915: ppgtt update pvmmio optimization > > drivers/gpu/drm/i915/i915_drv.c | 2 + > drivers/gpu/drm/i915/i915_drv.h | 15 +++++- > drivers/gpu/drm/i915/i915_gem_gtt.c | 67 +++++++++++++++++++++++++ > drivers/gpu/drm/i915/i915_irq.c | 82 ++++++++++++++++++++++++++++-- > drivers/gpu/drm/i915/i915_pvinfo.h | 43 +++++++++++++++- > drivers/gpu/drm/i915/i915_vgpu.c | 44 ++++++++++++++++- > drivers/gpu/drm/i915/intel_lrc.c | 88 +++++++++++++++++++++++++++++++-- > drivers/gpu/drm/i915/intel_ringbuffer.h | 3 ++ > 8 files changed, 333 insertions(+), 11 deletions(-) > _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
