STRUCT DRM_MOCK_SCHEDULER(9)

💅 struct drm_mock_scheduler(9) 💅

okay so bestie, welcome to the struct drm_mock_scheduler(9) page from the Kernel API Manual — this is the whole entire glow-up tour of a fake-but-fabulous GPU execution engine, and yes, I'm obsessed 🫶

---

✨ NAME ✨

struct drm_mock_scheduler — it implements a trivial mock GPU execution engine. That's it, that's the vibe. A pretend little scheduler for your tests, no real hardware required, no cap 💅

---

🌸 SYNOPSIS 🌸

struct drm_mock_scheduler {
    struct drm_gpu_scheduler base;
    struct kunit            *test;
    spinlock_t lock;
    struct list_head        job_list;
    struct {
      u64 context;
      atomic_t next_seqno;
      unsigned int    cur_seqno;
    } hw_timeline;
 };

---

🎀 Members 🎀

• base — the DRM scheduler base class, literally the whole foundation of this struct's main character energy ✨
• test — a backpointer to the kunit test case that owns this thing, iykyk 🧚
• lock — the lock that protects the simulated hw_timeline and the job_list. keep 'em safe, queen 👑
• job_list — the list of jobs submitted to the mock GPU. everybody queued up in here 🦋
• hw_timeline — the simulated hardware timeline! it's got a context, a next_seqno and a cur_seqno, which together implement a struct dma_fence signaling the simulated job completion. so extra, so iconic 🔥

---

⭐ Description ⭐

This trivial mock GPU execution engine tracks submitted jobs and — here's the slay — enables completing them strictly in submission order. no jumping the queue, no cutting in line, periodt 💀

---

💖 SEE ALSO 💖

Kernel file ./drivers/gpu/drm/scheduler/tests/sched_tests.h and its besties: struct drm_mock_sched_entity(9), struct drm_mock_sched_job(9), drm_mock_sched_job_submit(9), drm_mock_sched_job_set_duration_us(9), drm_mock_sched_job_is_finished(9), drm_mock_sched_job_wait_finished(9), drm_mock_sched_job_wait_scheduled(9) — go read them all, fr fr 🌈

---

and that's the page bestie!! 🍓 live from ./drivers/gpu/drm/scheduler/tests, dated October 2026, brought to you by the struct drm_mock_scheduler(9) of the Kernel API Manual 💜 mwah, go write some tests ✨