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On 25/08/16 15:53, <a class="moz-txt-link-abbreviated" href="mailto:techicist@gmail.com">techicist@gmail.com</a> wrote:<br>
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cite="mid:CANiaOCkME_ksXuLVntatmBt7WzfD47Gt3-p0fWB39MG2OOj9-g@mail.gmail.com"
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<pre wrap="">Sorry, what is flowblind? Yes, I am using cake :)</pre>
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flowblind gives you a single queue, who's maximum size is managed by
(a modified) codel. It's useful for testing the codel.<br>
<br>
In the default (non- flowblind), each stream is randomly assigned to
one of hundreds of queues. In fact cake magically avoids flows
sharing queues until they have to. Then each queue is treated
"fairly" w.r.t the bandwidth it can use.<br>
<br>
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cite="mid:CANiaOCkME_ksXuLVntatmBt7WzfD47Gt3-p0fWB39MG2OOj9-g@mail.gmail.com"
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<pre wrap="">So is that latency increase when uploading and downloading? And so I should
be aiming to achieve that as I slowly increase the bandwidth?</pre>
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That's the general idea, yes.<br>
<br>
For looking at latency statistics, FLENT also has a cumulative
probability graph.<br>
<br>
If you'd rather have the numbers summarized for you, you might
prefer Richard's netperfrunner. That's what I used to start with.
It's not 100% the same but very close. (It's designed to only use
ping for latency, which means it can use as close a target - on the
other side of the ISP link - as possible. E.g. taken from
"traceroute". I found that was useful for sensitivity).<br>
<br>
<a class="moz-txt-link-freetext" href="https://github.com/richb-hanover/CeroWrtScripts">https://github.com/richb-hanover/CeroWrtScripts</a><br>
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<pre wrap="">
On 24 August 2016 at 20:49, Alan Jenkins <<a class="moz-txt-link-abbreviated" href="mailto:alan.christopher.jenkins@gmail.com">alan.christopher.jenkins@gmail.com</a>
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<pre wrap="">wrote:
</pre>
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<pre wrap="">
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<pre wrap="">On 24/08/16 20:47, Alan Jenkins wrote:
So you can read off (+calculate) overall throughput, in both directions.
And it looks like your latency under load rises by only about 2ms. That's
the sort of thing we're aiming for.
Pure codel aims for 5ms, so I take it you're using fq_codel.
/reads subject line
or using standard cake, and not passing `flowblind` to disable the fair
queuing
And... yes
(1500 * 8) / 4_000_000 = 0.003
It takes 3ms to transmit a full packet in the slower direction. So when
it's busy, ping can be delayed on average by 1.5ms (while the current
packet is transmitted). Something like that anyway.
On 24/08/16 20:33, <a class="moz-txt-link-abbreviated" href="mailto:techicist@gmail.com">techicist@gmail.com</a> wrote:
Thanks for the reply. I understand now 😀
What can be taken from these graphs? I'm afraid I really am lost now.
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