flowchart TD
  subgraph GPU
    slot-0[HW Run Queue]
    slot-1[HW Run Queue]
    slot-2[HW Run Queue]
  end

  sched0[drm_gpu_scheduler]
  sched1[drm_gpu_scheduler]
  sched2[drm_gpu_scheduler]

  runq00[drm_sched_rq<br>KERNEL]
  runq01[drm_sched_rq<br>HIGH]
  runq02[drm_sched_rq<br>NORMAL]
  runq03[drm_sched_rq<br>LOW]

  runq10[drm_sched_rq<br>KERNEL]
  runq11[drm_sched_rq<br>HIGH]

  runq20[drm_sched_rq<br>KERNEL]
  runq21[drm_sched_rq<br>HIGH]
  runq22[drm_sched_rq<br>NORMAL]

  entity00@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity01@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity02@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity03@{shape: docs, label: "drm_sched_entity<br>job chain"}

  entity10@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity11@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity12@{shape: docs, label: "drm_sched_entity<br>job chain"}


  entity20@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity21@{shape: docs, label: "drm_sched_entity<br>job chain"}
  entity22@{shape: docs, label: "drm_sched_entity<br>job chain"}

  entity00 --> entity01 --> entity02 --> entity03 --> runq00
  entity10 --> entity11 --> entity12 --> runq10
  entity20 --> entity21 --> entity22 --> runq02

  runq00 --> sched0
  runq01 --> sched0
  runq02 --> sched0
  runq03 --> sched0

  runq10 --> sched1
  runq11 --> sched1

  runq20 --> sched2
  runq21 --> sched2
  runq22 --> sched2

  sched0 --> slot-0
  sched1 --> slot-1
  sched2 --> slot-2

Power State

gfxstream

QEMU

virtio - 半虚拟化设备标准

flowchart TB
  subgraph p [Main Thread]
    subgraph p0 ["piglit_drm_create_dma_buf()"]
      p.a["drv->create(w, h, fourcc, src_data, drm_buf)"]
      p.b["drv->export(drm_buf)"]
    end
  end
  subgraph t1 [Thread 1]
    subgraph lo11 [Loop 1]
      t1.a["eglCreateContext()"]
      t1.b["eglMakeCurrent()"]
      t1.c["egl_image_for_dma_buf_fd<br>(buf, fd, fourcc, img)"]
      t1.d["texture_for_egl_image(img, texture)"]
      t1.e["eglDestroyImageKHR(display, img)"]
      t1.f["glDeleteTextures(1, &texture)"]
      t1.g["glFinish()"]
    end
  end

  subgraph t2 [Thread 2]
    subgraph lo21 [Loop 1]
      t2.a["eglCreateContext()"]
      t2.b["eglMakeCurrent()"]
      t2.c["egl_image_for_dma_buf_fd<br>(buf, fd, fourcc, img)"]
      t2.d["texture_for_egl_image(img, texture)"]
      t2.e["eglDestroyImageKHR(display, img)"]
      t2.f["glDeleteTextures(1, &texture)"]
      t2.g["glFinish()"]
    end
  end

  p.a --> p.b

  t1.a --> t1.b --> t1.c --> t1.d --> t1.e --> t1.f --> t1.g
  t2.a --> t2.b --> t2.c --> t2.d --> t2.e --> t2.f --> t2.g

  p --> t1
  p --> t2

  lo11 -- 100000 times --> lo11
  lo21 -- 100000 times --> lo21

  click p.a https://gitlab.freedesktop.org/mesa/piglit/-/blob/main/tests/util/piglit-framework-gl/piglit_drm_dma_buf.c#L519"
  click p.b https://gitlab.freedesktop.org/mesa/piglit/-/blob/main/tests/util/piglit-framework-gl/piglit_drm_dma_buf.c#L519"