[PATCH v5 0/8] make performance is associated with vGPU type

[Gao, Ping A]

v5:     1. use ktime to replace get_cycles.
        2. remove idle_vgpu from schedule queue and simplify some logic.
        3. Proper define weight and it's limitation.

On 2017/3/28 14:47, Gao, Ping A wrote:
> v4:	1. re-arrange the patch order, put the weight interface before
> 	   the weight implementation.
> 	2. Define fixed weight according to the fixed vGPU type.
>
> v3:     1. rename dummy vGPU to idle vGPU.
>         2. introduce an enum for num_vgpu_sched.
>         3. rename some structure and function.
>         4. comments elaborating.
>         5. didnot add statitic interface as no per-vgpu interface exist.
>
> v2:
>         1. use hrtimer to replace delay_work to trigger scheduler.
>         2. introduce dummy vGPU to help handle performance control.
>         3. introduce vGPU LRU list to handle longest unsched vGPU.
>         4. Test result(stability and precision) seems good.
>
> v1:
>         1. Currrently, scheduler is triggered by delay_work, it's only can be
>            accurate at 10ms level, so have to change the scheduler period to
>            10ms, it will have stability impact.
>         2. Test two vGPU type 2 and type 5, the fps of tropic in two guest show
>            about 5:2, it's workable but the precision is not good.
>
>         TODO: 1. Use htimer replace the delay_work to trigger scheduler.
>               2. Create dummy vGPU to help caculation.
>
> Ping Gao (8):
>   drm/i915/gvt: use hrtimer replace delayed_work in scheduler
>   drm/i915/gvt: add some statistic routine for scheduler
>   drm/i915/gvt: factor out the scheduler
>   drm/i915/gvt: introduce the vGPU LRU list
>   drm/i915/gvt: define weight according to vGPU type
>   drm/i915/gvt: add basic function for weight control
>   drm/i915/gvt: create an idle vGPU
>   drm/i915/gvt: let timeslice usage control vGPU scheduling
>
>  drivers/gpu/drm/i915/gvt/gvt.c          |  16 ++
>  drivers/gpu/drm/i915/gvt/gvt.h          |  13 ++
>  drivers/gpu/drm/i915/gvt/handlers.c     |   1 +
>  drivers/gpu/drm/i915/gvt/kvmgt.c        |   6 +-
>  drivers/gpu/drm/i915/gvt/sched_policy.c | 343 +++++++++++++++++++++++++++-----
>  drivers/gpu/drm/i915/gvt/sched_policy.h |   2 +
>  drivers/gpu/drm/i915/gvt/vgpu.c         |  85 +++++++-
>  7 files changed, 407 insertions(+), 59 deletions(-)
>