idpf_update_dim_sample(9)

✨ idpf_update_dim_sample(9) ✨

okay so real talk, this one is from the Kernel API Manual (section 9, kernel internals bestie 💅) and it's lowkey a little bookkeeping gremlin — but an important bookkeeping gremlin. Let's get into it 🫶

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🌸 NAME 🌸

idpf_update_dim_sample — the function that updates a dim sample with packets and bytes 🎀

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🦋 SYNOPSIS 🦋

void idpf_update_dim_sample (struct idpf_q_vector *q_vector , struct
dim_sample *dim_sample , struct dim *dim , u64 packets , u64 bytes );

like, void in, void out — she does her thing and doesn't return anything to you, no cap ✨

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💖 ARGUMENTS 💖

• q_vector — bestie, this is the vector that's associated with the interrupt 🔥
• dim_sample — the dim sample that's getting updated, she's the main character here 👑
• dim — the dim instance structure, the actual struct in question 🎀
• packets — total packets, as a u64 📦
• bytes — total bytes, also a u64 🌈

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💅 DESCRIPTION 💅

So what she does is: she updates the dim sample with the packets and bytes that get passed into this function. That's it, that's the whole vibe 💖

And then — this is the part that actually matters — she sets the dim state appropriately if the dim settings get stale. Like, if the settings are giving expired milk, she notices and adjusts the state so it's not sitting there rotting 😭 periodt.

it's giving "quietly keeping the interrupt moderation from going off the rails" energy and honestly? we love her for it 🧚

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⭐ SEE ALSO ⭐

Kernel file ./drivers/net/ethernet/intel/idpf/idpf_txrx.c — yes, that's where she lives 🏠

and the whole extended found family of idpf friends (iykyk, there are so many of them, I'm listing every single one because I'm not doing y'all dirty 🙈):

idpf_chk_linearize(9), idpf_tx_timeout(9), idpf_tx_buf_rel_all(9), idpf_tx_desc_rel(9), idpf_compl_desc_rel(9), idpf_tx_desc_rel_all(9), idpf_tx_buf_alloc_all(9), idpf_tx_desc_alloc(9), idpf_compl_desc_alloc(9), idpf_tx_desc_alloc_all(9), idpf_rx_page_rel(9), idpf_rx_hdr_buf_rel_all(9), idpf_rx_buf_rel_bufq(9), idpf_rx_buf_rel_all(9), idpf_rx_desc_rel(9), idpf_rx_desc_rel_bufq(9), idpf_rx_desc_rel_all(9), idpf_rx_buf_hw_update(9), idpf_rx_hdr_buf_alloc_all(9), idpf_post_buf_refill(9), idpf_rx_post_buf_desc(9), idpf_rx_post_init_bufs(9), idpf_rx_buf_alloc_singleq(9), idpf_rx_bufs_init_singleq(9), idpf_rx_buf_alloc_all(9), idpf_rx_bufs_init(9), idpf_rx_bufs_init_all(9), idpf_rx_desc_alloc(9), idpf_bufq_desc_alloc(9), idpf_rx_desc_alloc_all(9), idpf_vector_to_queue_set(9), idpf_qp_switch(9), idpf_txq_group_rel(9), idpf_rxq_sw_queue_rel(9), idpf_rxq_group_rel(9), idpf_vport_queue_grp_rel_all(9), idpf_vport_queues_rel(9), idpf_vport_init_fast_path_txqs(9), idpf_vport_init_num_qs(9), idpf_vport_calc_num_q_desc(9), idpf_vport_calc_total_qs(9), idpf_vport_calc_num_q_groups(9), idpf_vport_calc_numq_per_grp(9), idpf_rxq_set_descids(9), idpf_txq_group_alloc(9), idpf_rxq_group_alloc(9), idpf_vport_queue_grp_alloc_all(9), idpf_vport_queues_alloc(9), idpf_tx_read_tstamp(9), idpf_tx_splitq_clean(9), idpf_tx_clean_bufs(9), idpf_tx_handle_rs_completion(9), idpf_tx_clean_complq(9), idpf_wait_for_sw_marker_completion(9), idpf_tx_splitq_build_ctb(9), idpf_tx_splitq_build_flow_desc(9), idpf_txq_has_room(9), idpf_tx_maybe_stop_splitq(9), idpf_tx_buf_hw_update(9), idpf_tx_res_count_required(9), idpf_tx_splitq_bump_ntu(9), idpf_tx_get_free_buf_id(9), idpf_tx_splitq_pkt_err_unmap(9), idpf_tx_splitq_map(9), idpf_tso(9), idpf_tx_splitq_get_ctx_desc(9), idpf_tx_drop_skb(9), idpf_tx_tstamp(9), idpf_tx_set_tstamp_desc(9), idpf_tx_splitq_need_re(9), idpf_tx_splitq_frame(9), idpf_tx_start(9), idpf_rx_hash(9), idpf_rx_csum(9), idpf_rx_splitq_extract_csum_bits(9), idpf_rx_rsc(9), idpf_rx_hwtstamp(9), __idpf_rx_process_skb_fields(9), idpf_rx_hsplit_wa(9), idpf_rx_splitq_test_staterr(9), idpf_rx_splitq_is_eop(9), idpf_rx_splitq_clean(9), idpf_rx_update_bufq_desc(9), idpf_rx_clean_refillq(9), idpf_rx_clean_refillq_all(9), idpf_vport_intr_clean_queues(9), idpf_vport_intr_napi_del_all(9), idpf_vport_intr_napi_dis_all(9), idpf_vport_intr_rel(9), idpf_vport_intr_rel_irq(9), idpf_vport_intr_dis_irq_all(9), idpf_vport_intr_buildreg_itr(9), idpf_net_dim(9), idpf_vport_intr_update_itr_ena_irq(9), idpf_vport_intr_req_irq(9), idpf_vport_intr_write_itr(9), idpf_vport_intr_ena_irq_all(9), idpf_vport_intr_dis_dim_all(9), idpf_vport_intr_deinit(9), idpf_tx_dim_work(9), idpf_rx_dim_work(9), idpf_init_dim(9), idpf_vport_intr_napi_ena_all(9), idpf_tx_splitq_clean_all(9), idpf_rx_splitq_clean_all(9), idpf_vport_splitq_napi_poll(9), idpf_vport_intr_map_vector_to_qs(9), idpf_vport_intr_init_vec_idx(9), idpf_vport_intr_napi_add_all(9), idpf_vport_intr_alloc(9), idpf_vport_intr_init(9), idpf_config_rss(9), idpf_fill_dflt_rss_lut(9), idpf_init_rss_lut(9), idpf_deinit_rss_lut(9)

(no I did not skip any, we don't do that here 💀)

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go read idpf_init_dim(9) and idpf_tx_dim_work(9) / idpf_rx_dim_work(9) next if you want the full dim lore, bestie — it's giving connected universe 🌸

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🎀 that's the whole page! this one lives in ./drivers/net/ethernet/intel/idpf, dated October 2026 — ty for coming to my ted talk, mwah 💖✨🫶