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drm/i915/gvt: Support event based scheduling 

This patch decouple the time slice calculation and scheduler, let
other event be able to trigger scheduling without impact the
calculation for QoS.

v2: add only one new enum definition.
v3: fix typo.

Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
This commit is contained in:
Ping Gao 2017-05-24 20:30:17 +08:00 committed by Zhenyu Wang
parent 089f93c3f9
commit c713cb2f9b
3 changed files with 18 additions and 6 deletions
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4
drivers/gpu/drm/i915/gvt/gvt.c
View File

@ -147,7 +147,9 @@ static int gvt_service_thread(void *data)
mutex_unlock(&gvt->lock); mutex_unlock(&gvt->lock);
} }
if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED, if (test_bit(INTEL_GVT_REQUEST_SCHED,
(void *)&gvt->service_request) ||
test_bit(INTEL_GVT_REQUEST_EVENT_SCHED,
(void *)&gvt->service_request)) { (void *)&gvt->service_request)) {
intel_gvt_schedule(gvt); intel_gvt_schedule(gvt);
} }

5
drivers/gpu/drm/i915/gvt/gvt.h
View File

@ -256,7 +256,12 @@ static inline struct intel_gvt *to_gvt(struct drm_i915_private *i915)
enum { enum {
INTEL_GVT_REQUEST_EMULATE_VBLANK = 0, INTEL_GVT_REQUEST_EMULATE_VBLANK = 0,
/* Scheduling trigger by timer */
INTEL_GVT_REQUEST_SCHED = 1, INTEL_GVT_REQUEST_SCHED = 1,
/* Scheduling trigger by event */
INTEL_GVT_REQUEST_EVENT_SCHED = 2,
}; };
static inline void intel_gvt_request_service(struct intel_gvt *gvt, static inline void intel_gvt_request_service(struct intel_gvt *gvt,

15
drivers/gpu/drm/i915/gvt/sched_policy.c
View File

@ -198,11 +198,6 @@ static void tbs_sched_func(struct gvt_sched_data *sched_data)
struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler; struct intel_gvt_workload_scheduler *scheduler = &gvt->scheduler;
struct vgpu_sched_data *vgpu_data; struct vgpu_sched_data *vgpu_data;
struct intel_vgpu *vgpu = NULL; struct intel_vgpu *vgpu = NULL;
static uint64_t timer_check;
if (!(timer_check++ % GVT_TS_BALANCE_PERIOD_MS))
gvt_balance_timeslice(sched_data);
/* no active vgpu or has already had a target */ /* no active vgpu or has already had a target */
if (list_empty(&sched_data->lru_runq_head) || scheduler->next_vgpu) if (list_empty(&sched_data->lru_runq_head) || scheduler->next_vgpu)
goto out; goto out;
@ -227,9 +222,19 @@ out:
void intel_gvt_schedule(struct intel_gvt *gvt) void intel_gvt_schedule(struct intel_gvt *gvt)
{ {
struct gvt_sched_data *sched_data = gvt->scheduler.sched_data; struct gvt_sched_data *sched_data = gvt->scheduler.sched_data;
static uint64_t timer_check;
mutex_lock(&gvt->lock); mutex_lock(&gvt->lock);
if (test_and_clear_bit(INTEL_GVT_REQUEST_SCHED,
(void *)&gvt->service_request)) {
if (!(timer_check++ % GVT_TS_BALANCE_PERIOD_MS))
gvt_balance_timeslice(sched_data);
}
clear_bit(INTEL_GVT_REQUEST_EVENT_SCHED, (void *)&gvt->service_request);
tbs_sched_func(sched_data); tbs_sched_func(sched_data);
mutex_unlock(&gvt->lock); mutex_unlock(&gvt->lock);
} }