<div dir="ltr">Do you have the latest (head) version of netperf and netperf-wrapper? some changes were made to both that give better UDP results.<div><br></div><div>-Aaron</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Mon, Feb 24, 2014 at 3:36 PM, Rich Brown <span dir="ltr"><<a href="mailto:richb.hanover@gmail.com" target="_blank">richb.hanover@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
CeroWrt <a href="tel:3.10.28-14" value="+13102814">3.10.28-14</a> is doing a good job of keeping latency low. But... it has two other effects:<br>
<br>
- I don't get the full "7 mbps down, 768 kbps up" as touted by my DSL provider (Fairpoint). In fact, CeroWrt struggles to get above 6.0/0.6 mbps.<br>
<br>
- When I adjust the SQM parameters to get close to those numbers, I get increasing levels of packet loss (5-8%) during a concurrent ping test.<br>
<br>
So my question to the group is whether this behavior makes sense: that we can have low latency while losing ~10% of the link capacity, or that getting close to the link capacity should induce large packet loss...<br>
<br>
Experimental setup:<br>
<br>
I'm using a Comtrend 583-U DSL modem, that has a sync rate of 7616 kbps down, 864 kbps up. Theoretically, I should be able to tell SQM to use numbers a bit lower than those values, with an ATM plus header overhead with default settings.<br>
<br>
I have posted the results of my netperf-wrapper trials at <a href="http://richb-hanover.com" target="_blank">http://richb-hanover.com</a> - There are a number of RRUL charts, taken with different link rates configured, and with different link layers.<br>
<br>
I welcome people's thoughts for other tests/adjustments/etc.<br>
<br>
Rich Brown<br>
Hanover, NH USA<br>
<br>
PS I did try the <a href="tel:3.10.28-16" value="+13102816">3.10.28-16</a>, but ran into troubles with wifi and ethernet connectivity. I must have screwed up my local configuration - I was doing it quickly - so I rolled back to <a href="tel:3.10.28.14" value="+13102814">3.10.28.14</a>.<br>
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