amdgpu_fenc...rt_timestamp(9)

📦 version 7.3.1, in nixpkgs unstable

💅 amdgpu_fence_update_start_timestamp(9) — the kernel API manual, but make it friendly

okay so bestie, welcome to the amdgpu_fence_update_start_timestamp(9) page 💖 this is from the Kernel API Manual (that's the manual name, iykyk) and it's literally one function, but she's an icon.

✨ NAME ✨

amdgpu_fence_update_start_timestamp — update the timestamp of the fence 🎀

like. the whole job. she stamps the fence. periodt.

🌸 SYNOPSIS 🌸

void amdgpu_fence_update_start_timestamp (struct amdgpu_ring *ring ,
uint32_t seq , ktime_t timestamp );

returns void, so no take-backs, no return value to obsess over 💀

🦋 ARGUMENTS 🦋

  • ring — the ring the fence is associated with 🌀 (yes that ring, the amdgpu one)
  • seq — the fence seq number to update. the specific one. no cap.
  • timestamp — the start timestamp to update. this is the whole point of the function, slay ⭐

👑 DESCRIPTION 👑

so here's the tea 🍓: this function gets called at the time the fence and the related ib is about to be resubmitted to the gpu — specifically in the MCBP scenario. main character energy, honestly.

and because of when it's called, we do not consider race conditions with amdgpu_fence_process to modify the same fence. like, that's just not a thing we're worried about here 🙈 the timing means it's not an issue, fr fr.

lowkey important: that "we do not consider race condition" line is doing real work. don't go adding your own locking adventure, bestie 💅

🔥 SEE ALSO 🔥

the kernel file, in all her glory:

./drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

and the whole fence friend group 🫶 — every single one, no skips:

and that's the page, bestie 🌈💜 she lives in ./drivers/gpu/drm/amd/amdgpu, she's dated October 2026, and honestly? iconic. go update some timestamps responsibly 🎀✨ </output>

📦 where this page comes from