On Tue, 1 Jun 2021 11:14:36 -0700 Jesse Brandeburg wrote:

quoted

3. ethool(netlink with cqe mode) + kernel with cqe mode:
estuary:/$ ethtool -c eth0
Coalesce parameters for eth0:
Adaptive RX: on  TX: on
stats-block-usecs: n/a
sample-interval: n/a
pkt-rate-low: n/a
pkt-rate-high: n/a

rx-usecs: 20
rx-frames: 0
rx-usecs-irq: n/a
rx-frames-irq: n/a

tx-usecs: 20
tx-frames: 0
tx-usecs-irq: n/a
tx-frames-irq: n/a

rx-usecs-low: n/a
rx-frame-low: n/a
tx-usecs-low: n/a
tx-frame-low: n/a

rx-usecs-high: 0
rx-frame-high: n/a
tx-usecs-high: 0
tx-frame-high: n/a

CQE mode RX: off  TX: off  

BTW, thanks for working on something like this.
I hope it's not just me, but I don't like the display of the new CQE
line, at the very least, it's not consistent with what is there already
in the output of this command, and at worst, it surprises the user and
makes it hard to parse for any scripting tools.

Tools should parse JSON output ;)

Can I suggest something like:

rx-cqe: off
tx-cqe: off
rx-eqe: off
tx-eqe: off

Then, if hardware is in EQE mode it is clear that it's supported and
ON/OFF, as well as for CQE mode.

This is how "Adaptive" is displayed, maybe we should move the line up
so that it's closer to its inspiration?

Having cqe/eqe both listed when only one can be "on" may not be 100%
intuitive either (assuming my understanding that this feature is just
about restarting the timer on new packet arrival is correct).