[RFC v3 0/9] make performance is associated with vGPU type
Gao, Ping A
ping.a.gao at intel.com
Thu Mar 2 08:20:37 UTC 2017
On 2017/3/2 15:16, Zhenyu Wang wrote:
> On 2017.03.02 10:19:34 +0800, Ping Gao wrote:
>> 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.
> Just have a quick review, I think there's some order issues, preceding patch
> in series should not depend on later ones, e.g should first add weight
> interface for vgpu, then add weight based timeslice scheduling function, etc.
> We need each one to be bisect-able, so be careful on patch order.
OK, I will put the last patch forward.
> And weight value setting for vgpu type needs to refresh on latest gvt-staging
> change for fixed vgpu types.
OK, I will rebase the last patch on your newest code.
>
>> 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 (9):
>> drm/i915/gvt: use hrtimer replace delayed_work in scheduler
>> drm/i915/gvt: create an idle vGPU
>> drm/i915/gvt: insert the idle vGPU into 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: add basic function for weight control
>> drm/i915/gvt: control the scheduler by timeslice usage
>> drm/i915/gvt: define weight according to vGPU type
>>
>> drivers/gpu/drm/i915/gvt/gvt.c | 17 ++
>> drivers/gpu/drm/i915/gvt/gvt.h | 15 ++
>> drivers/gpu/drm/i915/gvt/handlers.c | 1 +
>> drivers/gpu/drm/i915/gvt/kvmgt.c | 4 +-
>> drivers/gpu/drm/i915/gvt/sched_policy.c | 356 +++++++++++++++++++++++++++-----
>> drivers/gpu/drm/i915/gvt/sched_policy.h | 2 +
>> drivers/gpu/drm/i915/gvt/vgpu.c | 59 ++++++
>> 7 files changed, 402 insertions(+), 52 deletions(-)
>>
>> --
>> 2.7.4
>>
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