[Bloat] CAKE in openwrt high CPU

[Toke Høiland-Jørgensen]

Jonathan Foulkes <jf at jonathanfoulkes.com> writes:

>> Right, so some benefit might be possible here. Does the NIC have
>> multiple hardware queues (`ls /sys/class/net/$IFACE/queues` should tell
>> you)?
>
> Here is the output of:
> /sys/devices/virtual/net/eth0.2/queues# ls
> rx-0  tx-0
> /sys/devices/virtual/net/eth0.2/queues/rx-0# cat rps_cpus 
> 0
>
> /sys/devices/virtual/net/eth0.2/queues/tx-0# cat xps_cpus 
> 0

Hmm, so no multiq support on this driver, it looks like. So not sure to
what extent it will be possible to effectively utilise both cores on
this box, sadly :/

>> Yup, the number of cores is only going to go up, so for CAKE to stay
>> relevant it'll need to be able to take advantage of this eventually :)
>
> True, the mid-range market is already there, and so soon will be the
> lower-end. And with ISPs lighting up more and more capacity, the
> demand will be there to be able to shape higher and higher rates.
>
> But I agree with Jonathan Morton that once every deice has sufficient
> capacity, more makes no difference. I went for 100/15 to 300/24 and
> never noticed the difference.
>
> Hell, there are days I switch to my backup 10/0.7 DSL line for a test,
> and forget to switch back, and will work for hours and not notice I’m
> not on the 300Mbps line ;-)

Heh, if you can live with a 10/0.7 line without noticing I think you're
more patient than me ;) But still, fair point; doesn't mean that people
will still not *want* to run a higher speeds, though... :)

-Toke