i915_oa_stream_enable(9)

💅 NAME 💅

okay bestie, welcome to the i915_oa_stream_enable(9) page from the Kernel API Manual — and the name is literally i915_oa_stream_enable - handle I915_PERF_IOCTL_ENABLE for OA stream. That’s it, that’s the whole vibe. 💖

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✨ SYNOPSIS ✨

the signature is giving short-and-slay:

void i915_oa_stream_enable (struct i915_perf_stream *stream );

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🎀 ARGUMENTS 🎀

• stream — an i915 perf stream opened for OA metrics. main character energy fr fr. 🫶

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🦋 DESCRIPTION 🦋

okay so what does it do? it [Re]enables hardware periodic sampling according to the period configured when opening the stream. no cap. 🌸

it also starts a hrtimer — yes bestie, a timer — that will periodically check for data in the circular OA buffer for notifying userspace (e.g. during a read or poll). literally iconic. 🔥

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🌈 SEE ALSO 🌈

bestie, go read the whole friend group — no skipping, iykyk: 👑

• Kernel file: ./drivers/gpu/drm/i915/i915_perf.c
• i915 Perf Overview(9)
• i915 Perf History and Comparison with Core Perf(9)
• OA Tail Pointer Race(9)
• struct perf_open_properties(9)
• oa_buffer_check_unlocked(9)
• append_oa_status(9)
• append_oa_sample(9)
• gen8_append_oa_reports(9)
• gen8_oa_read(9)
• gen7_append_oa_reports(9)
• gen7_oa_read(9)
• i915_oa_wait_unlocked(9)
• i915_oa_poll_wait(9)
• i915_oa_read(9)
• oa_get_render_ctx_id(9)
• oa_put_render_ctx_id(9)
• i915_oa_stream_disable(9)
• i915_oa_stream_init(9)
• i915_perf_read(9)
• i915_perf_poll_locked(9)
• i915_perf_poll(9)
• i915_perf_enable_locked(9)
• i915_perf_disable_locked(9)
• i915_perf_ioctl_locked(9)
• i915_perf_ioctl(9)
• i915_perf_destroy_locked(9)
• i915_perf_release(9)
• i915_perf_open_ioctl_locked(9)
• read_properties_unlocked(9)
• i915_perf_open_ioctl(9)
• i915_perf_register(9)
• i915_perf_unregister(9)
• i915_perf_add_config_ioctl(9)
• i915_perf_remove_config_ioctl(9)
• i915_perf_init(9)
• i915_perf_fini(9)
• i915_perf_ioctl_version(9)

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cute sign-off: source/version ./drivers/gpu/drm/i915, dated October 2026 — bye bestie, slay your perf stream! 💖✨