ixgbevf_update_itr(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ixgbevf_update_itr(9) — like, the dynamic ITR glow-up function

okay so bestie, welcome to the Kernel API Manual, section 9, and today's main character is ixgbevf_update_itr. she's not flashy, she's not loud, but she is literally keeping your interrupt rate from being a whole mess. iykyk 🎀

✨ NAME ✨

ixgbevf_update_itr — update the dynamic ITR value based on statistics 🌸

✨ SYNOPSIS ✨

void ixgbevf_update_itr (struct ixgbevf_q_vector *q_vector , struct
       ixgbevf_ring_container *ring_container );

no return value, she just does the thing. periodt 💅

✨ ARGUMENTS ✨

  • q_vector — the struct holding your interrupt and ring info. she's the whole vibe container, fr fr 🫶
  • ring_container — the struct holding the ring performance data. this is where the actual receipts live 📊

✨ DESCRIPTION ✨

So basically she stores a new ITR value based on the packets and byte counts from the last interrupt. 🦋 That's it. That's the job.

The whole point of doing this per-interrupt (instead of on some slower schedule) is that you get faster updates and a more accurate ITR for the current traffic pattern — like, the value actually matches what your NIC is doing right now, not what it was doing five minutes ago. highkey iconic behavior 👑

And about the constants inside this function: they were computed based on theoretical maximum wire speed, and the thresholds were set based on testing data, plus a genuine attempt to minimize response time while increasing bulk throughput. So it's not vibes-based math, it's science with a sprinkle of tuning ✨🧚

✨ SEE ALSO ✨

Okay so the source of truth is right here in the kernel tree:

Kernel file ./drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

and then here's the entire friend group, no one left behind, we don't do exclusion in this house 💖:

ngl the head of this page has a slightly truncated source path on it — ./drivers/net/ethernet/intel/i... — so if you need the fully spelled-out one, the kernel file line up in SEE ALSO has you covered 🫶

and that's the page, bestie!! 🎀 signed off from ./drivers/net/ethernet/intel/i... with the manual dated October 2026, and the page name is ixgbevf_update_itr(9) if you need to cite her in your notes. slay, go read the rest of the ixgbevf cinematic universe 🌈💜

📦 where this page comes from