drm/i915/gvt: Audit and shadow workload during ELSP writing
Let the workload audit and shadow ahead of vGPU scheduling, that
will eliminate GPU idle time and improve performance for multi-VM.
The performance of Heaven running simultaneously in 3VMs has
improved 20% after this patch.
v2:Remove condition current->vgpu==vgpu when shadow during ELSP
writing.
Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index 7929c02..bd59c6d 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -201,6 +201,9 @@ int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload)
struct intel_vgpu *vgpu = workload->vgpu;
int ret;
+ if (workload->shadowed)
+ return 0;
+
shadow_ctx->desc_template &= ~(0x3 << GEN8_CTX_ADDRESSING_MODE_SHIFT);
shadow_ctx->desc_template |= workload->ctx_desc.addressing_mode <<
GEN8_CTX_ADDRESSING_MODE_SHIFT;
@@ -228,6 +231,10 @@ int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload)
}
ret = populate_shadow_context(workload);
+ if (ret)
+ goto out;
+
+ workload->shadowed = true;
out:
return ret;