Can iperf work with no qos? (TCP mode)

[Michael Büsch]

On Sat, 11 Jun 2011 19:47:31 +0200
Rafał Miłecki <zajec5 at gmail.com> wrote:

> I can not get any results when trying to use iperf in TCP mode with
> driver not supporting qos.
> 
> Is this expected? Does iperf fill connection with so many packets,
> it's not possible to get response from the iperf receiver? Should not
> Linux somehow schedule packet to allow bi-direction communication,
> even on really filled connection?

iperf will only fill the best effort queue. At least that's what it did
last time when I looked into the code.
You can verify that with b43's ring statistics.