[Cerowrt-devel] Problems testing sqm (solved)
moeller0 at gmx.de
Sun Oct 25 16:33:30 EDT 2015
On Oct 25, 2015, at 21:02 , Richard Smith <smithbone at gmail.com> wrote:
> On 10/25/2015 01:36 PM, Rich Brown wrote:
>> We really do believe in this stuff. We've seen it work. But each of
>> us is enough of a scientist to believe that *we could be wrong*. (I
>> suspect that's why you really got everyone's attention)
> Indeed. An earlier version of the effort is running nicely on our gateway at work and that's what keeps the VoIP working. I was pretty certain I was the source of the problem I just didn't know where.
>> But, what a relief! Science Triumphs again! And now that we have a
>> sound basis for understanding what was wrong, a) we have one more
>> item for our troubleshooting questionnaire, and b) we can go back to
>> feeling just a little bit smug :-)
>> Thanks for sticking with us.
> Absolutely, Thanks for being patient.
I believe we are a rather friendly bunch (but who does not have that self image) and will put observed data before theory any day ;)
>> PS We'd love to hear the results of the experiment you really were
>> trying to perform.
> Working on it... I've run into a small snag in that I can't seem to
> return back to Linksys stock. For some reason the flash upload goes
> really, really, slow (I verified I'm using wired) and the upload times out before it completes.
Ihink I read in the openwrt forum people use the serial/jtag port for such things, but the memory is dim and the thread by now has reached like 900 pages or so...
> scping the linksys image to /tmp and trying with sysupgrade doesn't work
> either. I thought being sort of based on openwrt it might work...
> In the mean time I have some rrul logs running under designated driver. I've put them here:
> *nosqm* is with sqm disabled.
> *sqm-<N>-<N>* is with the ingress/egress set to N in MBits/s. using the
> simple.qos discipline.
Cool! I note it seems you are running an older flent version (or maybe even before the big rename, so netperf-wrapper). I think current flent includes enough improvements to merit a switch; I especially like “--remote-metadata=root at gw.home.lan” option to collect some data from the DUT automatically and save these into the output file, making it easy to answer a few question about the configuration used a few days/hours after the fact).
Also I want to note that if you shape ethernet you should use the link layer adaptation built into sqm (configurable via the GUI): Select Ethernet with overhead and specify the overhead to be: 24 Bytes (ethernet pre-amble & interframe gap & FCS, Linux will have already accounted for MACs & frame type 14 bytes, you may need to add vlan tag (4 additional bytes)).
> I'm happy to run any other tests if there is something specific desired.
> Note: I deleted the previous files I shared since they were bogus.
Ah, that got me confused, I see the new files just fine.
> I'm going to start playing wire wireless next. There's noise in the forms that it may not be working very well but its mixed in with 1200/1900AC so its hard to know how much applies to the ACS.
> Richard A. Smith
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