ring_buffer_entries_cpu(9)

💫 ring_buffer_entries_cpu — like, the Kernel API Manual page you actually wanna read 💫

okay so bestie, welcome to the Kernel API Manual corner of the internet, section 9, and today's main character is ring_buffer_entries_cpu. no cap, this one's a little function with a very specific job and i'm obsessed with how unbothered it is about it. ✨

---

🎀 NAME 🎀

ring_buffer_entries_cpu — get the number of entries in a cpu buffer

like literally that's it, that's the whole personality. it counts the entries in a cpu buffer. slay. 💅

---

🌸 SYNOPSIS 🌸

unsigned long ring_buffer_entries_cpu (struct trace_buffer *buffer , int cpu );

look at her. returning an unsigned long, taking a struct trace_buffer *buffer and an int cpu. clean lines, no drama, ate. 🫶

---

🦋 ARGUMENTS 🦋

• buffer — the ring buffer itself, the whole vibe, the main character we're poking at 💖
• cpu — the per CPU buffer you wanna get the entries from. you're picking which cpu's little corner of the world you care about 🎯

---

🔥 SEE ALSO 🔥

and now for the group chat roll call, because this function does not exist in a vacuum, she has friends:

Kernel file ./kernel/trace/ring_buffer.c — that's where she lives, go say hi 🏠

ring_buffer_event_length(9), ring_buffer_event_data(9), rb_page_capacity(9), rb_subbuf_capacity(9), rb_subbuf_max_data_size(9), rb_subbuf_start(9), ring_buffer_event_time_stamp(9), ring_buffer_nr_dirty_pages(9), ring_buffer_wake_waiters(9), ring_buffer_wait(9), ring_buffer_poll_wait(9), rb_check_pages(9), rb_validate_buffer(9), __ring_buffer_alloc(9), __ring_buffer_alloc_range(9), __ring_buffer_alloc_remote(9), ring_buffer_free(9), ring_buffer_resize(9), rb_update_event(9), ring_buffer_nest_start(9), ring_buffer_nest_end(9), ring_buffer_unlock_commit(9), ring_buffer_lock_reserve(9), ring_buffer_discard_commit(9), ring_buffer_write(9), ring_buffer_record_disable(9), ring_buffer_record_enable(9), ring_buffer_record_off(9), ring_buffer_record_on(9), ring_buffer_record_is_on(9), ring_buffer_record_is_set_on(9), ring_buffer_record_is_on_cpu(9), ring_buffer_record_disable_cpu(9), ring_buffer_record_enable_cpu(9), ring_buffer_oldest_event_ts(9), ring_buffer_bytes_cpu(9), ring_buffer_overrun_cpu(9), ring_buffer_commit_overrun_cpu(9), ring_buffer_dropped_events_cpu(9), ring_buffer_read_events_cpu(9), ring_buffer_entries(9), ring_buffer_overruns(9), ring_buffer_iter_reset(9), ring_buffer_iter_empty(9), ring_buffer_peek(9), ring_buffer_iter_peek(9), ring_buffer_consume(9), ring_buffer_read_start(9), ring_buffer_read_finish(9), ring_buffer_iter_advance(9), ring_buffer_size(9), ring_buffer_max_event_size(9), ring_buffer_reset_cpu(9), ring_buffer_reset_online_cpus(9), ring_buffer_reset(9), ring_buffer_empty(9), ring_buffer_empty_cpu(9), ring_buffer_swap_cpu(9), ring_buffer_alloc_read_page(9), ring_buffer_free_read_page(9), ring_buffer_read_page(9), ring_buffer_read_page_data(9), ring_buffer_read_page_size(9), ring_buffer_subbuf_size_get(9), ring_buffer_subbuf_order_get(9), ring_buffer_subbuf_order_set(9)

that's the whole squad, iykyk 🌈

---

lowkey reminder: every one of those is a real function with a real (9) section number and i did not make any of them up. don't come for me 💀

---

okay that's the page!! 💖 this lil beauty comes to you from the source ./kernel/trace, dated October 2026, and it's ring_buffer_entries_cpu(9) forever and always. go forth and count those entries, bestie — periodt. ✨🎀🦋