Re: [Make-wifi-fast] [PATCH v2] iw: Print TXQ statistics for stations and interfaces

[Pete Heist <peteheist@gmail.com>]

> On Feb 22, 2018, at 11:18 AM, Toke Høiland-Jørgensen <toke@toke.dk> wrote:
> 
> Sample output:
> 
> $ iw dev wlp2s0 station dump -v
> Station xx:xx:xx:xx:xx:xx (on wlp2s0)
> [...]
> 	TXQs:
> 		TID	qsz-byt	qsz-pkt	flows	drops	marks	overlmt	hashcol	tx-bytes	tx-packets
> 		0	0	0	0	0	0	0	0	0		0
> 		1	0	0	0	0	0	0	0	0		0
> 		2	0	0	0	0	0	0	0	0		0
> 		3	0	0	0	0	0	0	0	0		0
> 		4	0	0	0	0	0	0	0	0		0
> 		5	0	0	0	0	0	0	0	0		0
> 		6	0	0	0	0	0	0	0	0		0
> 		7	0	0	0	0	0	0	0	0		0
> 		8	0	0	0	0	0	0	0	0		0
> 		9	0	0	0	0	0	0	0	0		0
> 		10	0	0	0	0	0	0	0	0		0
> 		11	0	0	0	0	0	0	0	0		0
> 		12	0	0	0	0	0	0	0	0		0
> 		13	0	0	0	0	0	0	0	0		0
> 		14	0	0	0	0	0	0	0	0		0
> 		15	0	0	0	0	0	0	0	0		0
> [...]
> 
> $ iw dev wlp2s0 info
> Interface wlp2s0
> 	ifindex 9
> 	wdev 0x1
> 	addr xx:xx:xx:xx:xx:xx
> 	type AP
> 	wiphy 0
> 	channel 165 (5825 MHz), width: 20 MHz, center1: 5825 MHz
> 	txpower 24.00 dBm
> 	multicast TXQ:
> 		qsz-byt	qsz-pkt	flows	drops	marks	overlmt	hashcol	tx-bytes	tx-packets
> 		0	0	72	0	0	0	0	7380		72
> 

Could these stats make possible a userspace tool for determining the proportion of delay that is introduced by congestion vs by link layer issues? Such a tool could be really helpful for network engineers wanting to mitigate delay issues and not sure where to best focus their efforts...

Pete