Jakub Kicinski [off-list ref]

Sent: Thursday, August 10, 2023 2:38 AM

[...]

High weight will cause higher latency for other softirq and RT
processing, it's not a good idea. Even with weight/budget of 64
if there's no higher prio work to do the driver will be polled
again immediately if it consumed the budget and has more packets.

I mean that only the slow platform uses more than 64 budget,
even I set the weight to 256.
That is, for the fast platform, the actual used budget is always less than 64,
even the weight is 256.

Do you have some actual data on how the device performs with budget
of 64 and 256? And maybe perf traces to show where the difference goes?

I tested that slow embedded platform many years ago, so I
don't remember the actual data.
I think the difference is more than 400Mbps.

Best Regards,
Hayes