[LARTC] txqueuelen in ifconfig and tc

[LARTC] txqueuelen in ifconfig and tc

[Jonas Lindqvist]

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Hi there,

when reading "man ifconfig" it says the following:
" txqueuelen length
Set the length of the transmit queue of the device. It is useful to set this to small values  for slower  devices  with a high latency (modem links, ISDN) to prevent fast bulk transfers from dis­turbing interactive traffic like telnet too much."

This seems to normally be 100 (packets i guess?)

Is this queue affected by tc or is it after all shaping?

I wonder this because im doing the Wondershaper ACK-priority thing, but people with a small windowsize is still affected very much by not recieving their ACK fast enough on my system.

Any ideas anyone?

Regards
Jonas

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Re: [LARTC] txqueuelen in ifconfig and tc

[Werner Almesberger]

Jonas Lindqvist wrote:
> Is this queue affected by tc or is it after all shaping?

tx_queue_len provides default values for the queue size in
all FIFO qdiscs, and an in unconfigured GRED (which acts
just as a pfifo)),

In HTB, it sets the limit of the queue of class qdisc:0,
so it affects traffic that doesn't get shaped.

In any case, any additional queuing after traffic control
is at the discretion of the network interface driver, and
not affected by tx_queue_len.

- Werner

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 / Werner Almesberger, Buenos Aires, Argentina         wa@almesberger.net /
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