Interpreting ethtool Coalesce output

Question

Other than tx and rx being the transmit and recieve, can anyone explain what the fields mean in ethtool -c's (Coalescing output) and what effect they have on how coalescing works?

Coalesce parameters for eth0:
Adaptive RX: off  TX: off
stats-block-usecs: 999936
sample-interval: 0
pkt-rate-low: 0
pkt-rate-high: 0

rx-usecs: 18
rx-frames: 12
rx-usecs-irq: 18
rx-frames-irq: 2

tx-usecs: 80
tx-frames: 20
tx-usecs-irq: 18
tx-frames-irq: 2

rx-usecs-low: 0
rx-frame-low: 0
tx-usecs-low: 0
tx-frame-low: 0

rx-usecs-high: 0
rx-frame-high: 0
tx-usecs-high: 0
tx-frame-high: 0

Answer 1

the delay between the tx and rx events and the generation of interrupts for those events.

rx-frames[-irq] rx-usecs[-irq] tx-frames[-irq] tx-usecs[-irq]

The frames parameters specify how many packets are received/transmitted before generating an interrupt. The usecs parameters specify how many microseconds after at least 1 packet is received/transmitted before generating an interrupt. The [-irq] parameters are the corresponding delays in updating the status when the interrupt is disabled.

Answer 2

Usable interrupt coalescing parameters for the Tigeon 3 Network cards Image

From: https://monarch.qucosa.de/api/qucosa%3A19496/attachment/ATT-0/

Answer 3

I have found this: https://knowledge.informatica.com/s/article/80204?language=en_US

If I'm not mistaken, rx-max-frames is the same with rx-frames, so wherever you see rx-max-frames, translate it to rx-frames (e.g. rx-max-frames-low is rx-frame-low). Same for tx.