xe_lrc_timestamp(9)

💅 xe_lrc_timestamp(9) — like, the current lrc timestamp, bestie

okay so this is a page from the Kernel API Manual (fancy, I know 👑) and it's all about xe_lrc_timestamp, which literally just hands you the current lrc timestamp. that's it. that's the vibe. ✨

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🌸 SYNOPSIS 🌸

u64 xe_lrc_timestamp (struct xe_lrc *lrc );

yes she returns a u64 and yes she takes exactly one arg. iconic signature, no notes. 🎀

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🦋 ARGUMENTS 🦋

• lrc — pointer to the lrc. that's the whole thing. just a pointer. to the lrc. 🫶

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💖 DESCRIPTION 💖

so the function returns the latest lrc timestamp. easy enough, right?

but here's the tea ☕ — with support for active contexts/queues, the calculation may be slightly racy 😭 so you gotta follow a read-again logic to make sure the context/queue is still active before you return the right timestamp. no cap, that's the important bit. don't skip the re-check, bestie, or you'll get a timestamp that's giving stale energy 💀

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⭐ RETURN ⭐

the new lrc timestamp value. that's it. that's the return. slay. 💅

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🔥 SEE ALSO 🔥

• the kernel file ./drivers/gpu/drm/xe/xe_lrc.c
• xe_gt_lrc_hang_replay_size(9)
• xe_lrc_reg_size(9)
• xe_lrc_engine_state_size(9)
• xe_lrc_ctx_timestamp_ggtt_addr(9)
• xe_lrc_ctx_timestamp_udw_ggtt_addr(9)
• xe_lrc_ctx_timestamp(9)
• xe_lrc_queue_timestamp(9)
• xe_lrc_ctx_job_timestamp_ggtt_addr(9)
• xe_lrc_ctx_job_timestamp(9)
• xe_default_lrc_update_memirq_regs_with_address(9)
• xe_lrc_update_memirq_regs_with_address(9)
• xe_lrc_setup_wa_bb_with_scratch(9)
• xe_lrc_set_multi_queue_priority(9)
• xe_lrc_create(9)
• xe_lrc_destroy(9)
• xe_lrc_update_hwctx_regs_with_address(9)
• xe_lrc_alloc_seqno_fence(9)
• xe_lrc_free_seqno_fence(9)
• xe_lrc_init_seqno_fence(9)
• xe_lrc_engine_id(9)
• xe_lrc_update_timestamp(9)
• xe_lrc_ring_is_idle(9)

like, the whole lrc friend group showed up to the party 🎉 iykyk.

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k bye bestie, go read your timestamps responsibly 💜

this masterpiece lives in ./drivers/gpu/drm/xe and it was stamped with love in October 2026 🗓️✨ mwah 💋