Better visibility into packet-dropping decisions
Better visibility into packet-dropping decisions
Posted Feb 26, 2022 4:49 UTC (Sat) by alison (subscriber, #63752)Parent article: Better visibility into packet-dropping decisions
Assuredly knowing when packets are dropped because NAPI polling isn't keeping up with what's incoming would be valuable. Yeah, I'm sure that patches and test data would be welcome.
Posted Feb 27, 2022 21:26 UTC (Sun)
by shemminger (subscriber, #5739)
[Link]
Better visibility into packet-dropping decisions
In order to see packets dropping because CPU can't keep up you have to look at the hardware statistics.
This is reported in rx_missed. Not sure if there more that HW can tell you.
There are lots of rx_dropped places in drivers, these could/should be instrumented.