i40e_update_itr(9)

okay so bestie, this is i40e_update_itr(9) from the Kernel API Manual, and it's literally the function that updates the dynamic ITR value based on statistics. no cap, it's giving tiny-but-mighty stats gremlin energy 💅✨

🎀 NAME 🎀

i40e_update_itr — update the dynamic ITR value based on statistics 🌸

✨ SYNOPSIS ✨

void i40e_update_itr (struct i40e_q_vector *q_vector , struct i40e_ring_container *rc );

💅 ARGUMENTS 💅

• q_vector — the structure containing interrupt and ring information. it's the main character holding the interrupt + ring lore.
• rc — the structure containing ring performance data. performance data goes here, periodt.

🦋 DESCRIPTION 🦋

okay so what it does: it stores a new ITR value based on the packets and byte counts during the last interrupt. the way that per-interrupt computation hits different is that you get faster updates and a more accurate ITR for the current traffic pattern — highkey iconic.

the constants in this function were computed based on theoretical maximum wire speed, and the thresholds were set based on testing data as well as attempting to minimize response time while increasing bulk throughput. so yes, there's actual math behind the vibe check, not just vibes 🔥

🌈 SEE ALSO 🌈

Kernel file ./drivers/net/ethernet/intel/i40e/i40e_txrx.c is the home base, and the full SEE ALSO crew is: i40e_fdir(9), i40e_program_fdir_filter(9), i40e_create_dummy_packet(9), i40e_create_dummy_udp_packet(9), i40e_create_dummy_tcp_packet(9), i40e_create_dummy_sctp_packet(9), i40e_prepare_fdir_filter(9), i40e_change_filter_num(9), i40e_add_del_fdir_udp(9), i40e_add_del_fdir_tcp(9), i40e_add_del_fdir_sctp(9), i40e_add_del_fdir_ip(9), i40e_add_del_fdir(9), i40e_fd_handle_status(9), i40e_unmap_and_free_tx_resource(9), i40e_clean_tx_ring(9), i40e_free_tx_resources(9), i40e_get_tx_pending(9), i40e_detect_recover_hung(9), i40e_clean_tx_irq(9), i40e_enable_wb_on_itr(9), i40e_force_wb(9), i40e_reuse_rx_page(9), i40e_clean_programming_status(9), i40e_setup_tx_descriptors(9), i40e_clean_rx_ring(9), i40e_free_rx_resources(9), i40e_setup_rx_descriptors(9), i40e_release_rx_desc(9), i40e_alloc_mapped_page(9), i40e_alloc_rx_buffers(9), i40e_rx_checksum(9), i40e_rx_hash(9), i40e_process_skb_fields(9), i40e_cleanup_headers(9), i40e_can_reuse_rx_page(9), i40e_rx_buffer_flip(9), i40e_get_rx_buffer(9), i40e_put_rx_buffer(9), i40e_process_rx_buffs(9), i40e_construct_skb(9), i40e_build_skb(9), i40e_is_non_eop(9), i40e_run_xdp(9), i40e_xdp_ring_update_tail(9), i40e_update_rx_stats(9), i40e_finalize_xdp_rx(9), i40e_inc_ntp(9), i40e_add_xdp_frag(9), i40e_consume_xdp_buff(9), i40e_clean_rx_irq(9), i40e_buildreg_itr(9), i40e_update_enable_itr(9), i40e_napi_poll(9), i40e_atr(9), i40e_tx_prepare_vlan_flags(9), i40e_tso(9), i40e_tsyn(9), i40e_tx_enable_csum(9), i40e_create_tx_ctx(9), __i40e_maybe_stop_tx(9), __i40e_chk_linearize(9), i40e_tx_map(9), i40e_xmit_xdp_ring(9), i40e_xmit_frame_ring(9), i40e_lan_xmit_frame(9), i40e_xdp_xmit(9).

kisses and 🫶 — this page comes from ./drivers/net/ethernet/intel/i40e and is dated October 2026; Kernel API Manual energy forever, fr fr. 💖✨