fm10k_update_itr(9)

✨ fm10k_update_itr(9) ✨

okay so this is a page from the Kernel API Manual, and bestie, it's a whole ~9~ section situation about one tiny little function that's out here doing math on your packets 💅

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🌸 NAME 🌸

fm10k_update_itr — update the dynamic ITR value based on packet size

like, it literally says it right there: dynamic ITR, updated, based on packet size. no cap. 🎀

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🦋 SYNOPSIS 🦋

void fm10k_update_itr (struct fm10k_ring_container *ring_container );

that's the whole signature. void, so nothing comes back out — it just goes in and does the thing. 💖

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💜 ARGUMENTS 💜

• ring_container — the container for the rings whose ITR is gonna get updated. so like... it's the little basket of rings, and this function reaches in and freshens up their ITR. 🧺✨

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🔥 DESCRIPTION 🔥

okay so the tea: this stores a new ITR value based strictly on packet size. not vibes, not timing, not whatever else — packet size. periodt.

the divisors and thresholds this function uses? they weren't just picked out of thin air, bestie 😭 they were determined based on theoretical maximum wire speed and testing data, all so it can minimize response time while increasing bulk throughput. it's giving "did the homework" energy fr fr. 📚🔬

so yeah — lowkey a tiny function, highkey doing performance math. main character energy honestly. 👑

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🌈 SEE ALSO 🌈

first up, the kernel file it lives in:

• Kernel file ./drivers/net/ethernet/intel/fm10k/fm10k_main.c

and then the whole friend group 💅 (iykyk):

• fm10k_init_module(9), fm10k_exit_module(9), fm10k_alloc_rx_buffers(9), fm10k_reuse_rx_page(9), fm10k_add_rx_frag(9), fm10k_process_skb_fields(9), fm10k_is_non_eop(9), fm10k_cleanup_headers(9), fm10k_receive_skb(9), fm10k_get_tx_pending(9), fm10k_tx_timeout_reset(9), fm10k_clean_tx_irq(9), fm10k_set_qos_queues(9), fm10k_set_rss_queues(9), fm10k_set_num_queues(9), fm10k_reset_num_queues(9), fm10k_alloc_q_vector(9), fm10k_free_q_vector(9), fm10k_alloc_q_vectors(9), fm10k_free_q_vectors(9), fm10k_reset_msix_capability(9), fm10k_init_msix_capability(9), fm10k_cache_ring_qos(9), fm10k_cache_ring_rss(9), fm10k_assign_rings(9), fm10k_init_queueing_scheme(9), fm10k_clear_queueing_scheme(9)

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💀 warning-ish heads up: the description literally says the ITR value gets stored based strictly on packet size — so don't go expecting it to consider anything else, bestie. read it and weep, it's just size. 🙈

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okay bye bestie, go read the source 🫶 — this page came from ./drivers/net/ethernet/intel/f..., dated October 2026, and it's your girl fm10k_update_itr(9) signing off. mwah 💋🍓