igbvf_update_itr(9)

💅 igbvf_update_itr — the kernel API manual, but make it make sense

okay so bestie, this is page igbvf_update_itr(9) from the Kernel API Manual, and we're gonna get into it ✨

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🎀 NAME 🎀

igbvf_update_itr — update the dynamic ITR value based on statistics

like, it literally recalculates your interrupt throttling based on what the stats are saying. that's the whole vibe check. 💫

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✨ SYNOPSIS ✨

enum latency_range igbvf_update_itr (struct igbvf_adapter *adapter ,
enum latency_range itr_setting , int packets , int bytes );

yes she returns an enum latency_range, no cap. 👑

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🌸 ARGUMENTS 🌸

• adapter — pointer to adapter. that's your whole igbvf adapter struct, the main character 🫶
• itr_setting — current adapter->itr, like the value it's rocking right now
• packets — the number of packets during this measurement interval 📦
• bytes — the number of bytes during this measurement interval 🔢

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🦋 DESCRIPTION 🦋

So here's the tea: it stores a new ITR value based on the packets and byte counts from the last interrupt. 🎯

And the whole reason it's per-interrupt? The advantage of per interrupt computation is faster updates and more accurate ITR for the current traffic pattern. it's giving real-time responsiveness, honestly 💅

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 like, science + vibes + actual benchmarks. iconic 🧚

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🎀 SEE ALSO 🎀

Kernel file ./drivers/net/ethernet/intel/igbvf/netdev.c — that's where she lives 🏠

and then the whole friend group, fr fr:

• igbvf_desc_unused(9)
• igbvf_receive_skb(9)
• igbvf_alloc_rx_buffers(9)
• igbvf_clean_rx_irq(9)
• igbvf_setup_tx_resources(9)
• igbvf_setup_rx_resources(9)
• igbvf_clean_tx_ring(9)
• igbvf_free_tx_resources(9)
• igbvf_clean_rx_ring(9)
• igbvf_free_rx_resources(9)
• igbvf_clean_tx_irq(9)
• igbvf_configure_msix(9)
• igbvf_set_interrupt_capability(9)
• igbvf_request_msix(9)
• igbvf_alloc_queues(9)
• igbvf_request_irq(9)
• igbvf_irq_disable(9)
• igbvf_irq_enable(9)
• igbvf_poll(9)
• igbvf_set_rlpml(9)
• igbvf_configure_tx(9)
• igbvf_setup_srrctl(9)
• igbvf_configure_rx(9)
• igbvf_set_multi(9)
• igbvf_set_uni(9)
• igbvf_configure(9)
• igbvf_sw_init(9)
• igbvf_open(9)
• igbvf_close(9)
• igbvf_set_mac(9)
• igbvf_update_stats(9)
• igbvf_watchdog(9)
• igbvf_tx_timeout(9)
• igbvf_change_mtu(9)
• igbvf_io_error_detected(9)
• igbvf_io_slot_reset(9)
• igbvf_io_resume(9)
• igbvf_io_prepare(9)
• igbvf_io_reset_done(9)
• igbvf_probe(9)
• igbvf_remove(9)
• igbvf_init_module(9)
• igbvf_exit_module(9)

like, the whole squad. every single one. nobody left behind 🫶💖

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real talk though: this page is dated October 2026 and the source got truncated to ./drivers/net/ethernet/intel/i... in the footer, but that's just how the manpage renders it — the version tag is igbvf_update_itr(9). don't come for me, i'm just the messenger 😭

k bye, go read the source, mwah 💋🌈⭐