Hi Aaron,
On Aug 29, 2014, at 18:57 , Aaron Wood <[email protected]> wrote: > Comcast has upped the download rates in my area, from 50Mbps to 100Mbps. > This morning I tried to find the limit of the WNDR3800. And I found it. > 50Mbps is still well within capabilities, 100Mbps isn't. > > And as I've seen Dave say previously, it's right around 80Mbps total > (download + upload). > > http://burntchrome.blogspot.com/2014/08/new-comcast-speeds-new-cerowrt-sqm.html > > I tried disabling downstream shaping to see what the result was, and it > wasn't pretty. You could try to set the interface to 100Mbps with ethtool and exercise cerowrt BQL implementation a bit ;) > I also tried using the "simplest.qos" script, and that didn't really gain me > anything, so I went back to the simple.qos script (those results aren't > included above). > > It looks like it's definitely time for a new router platform (for me). > > Or, we need to find a way to implement the system such that it doesn't max > out a 680MHz mips core just to push 100Mbps of data. That's roughly 10K cpu > cycles per packet, which seems like an awful lot. Unless the other problem > is that the memory bus just can't keep up. My experience of a lot of these > processors is that the low-level offload engines have great DMA capabilities > for "wire-speed" operation, but that the processor core itself can't move > data to save it's life. Could you try simplest.qos and replace HTB with TBF? We still do not know whether there is a cheaper option than HTB that still works okay-ish (I only have 16D 2U, so can not easily test myself). I guess that TBF is just as expensive as HTB since both shaw more or less the same token bucket algorithm... > > What's the limit of the EdgeRouter Lite? I think this tops out at ~ 80-90Mbps combined, but there is no BQL yet. Given the price of tho unit it would be really nice if that would work for the 150-200Mbps combined that seem to be needed in the near future. > > Or should I start looking for something like this: > > http://www.gateworks.com/product/item/ventana-gw5310-network-processor > > (although that's an expensive board, given the very low production volume, > for the same cost I could probably build a small passively-cooled > mini/micro-atx setup running x86 and dual NICs). > > -Aaron > _______________________________________________ > Bloat mailing list > [email protected] > https://lists.bufferbloat.net/listinfo/bloat _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
