WRTnode Opened for $25 • Hacker News Board

ajb wrote: post #23

rffn wrote: post #13

Could I have this please with 802.11ac WiFi, 5GHz, preferrably supporting a 4x4 MIMO setup. I would love to have an open access point for my network. I like to have more than 300Mbps and to avoid the 2.4GHz network though even more. I understand this owuld be more expensive, but would be willing to pay a higher price.

I don't think networking is the market of this thing, despite the name. In fact, it could probably use a different name. It's a mips24k; I doubt it can do software networking at the 300mb speed the wifi runs at.

[deleted]

Re: WRTnode Opened for $25

#97

Post by listic » Wed, Aug 20, 2014, 12:58 PM UTC

ajb wrote: post #54

listic wrote: post #27

Earlier quoted context omitted.

Do you have an idea how much of bandwidth a MIPS cpu like that can push? The chip is actually made for routers: it has 802.11n "MAC/BBP", 5-port 10/100 switch, etc. http://www.anz.ru/files/mediatek/MT7620_Datasheet.pdf I wonder how "Hardware NAT with IPv6 and 2 Gbps wired speed" works if the switch is only 100 Mbits... I guess if what you want out of this is really a router, you are supposed to either build the rest…

I do, thanks.Hmm, let's see if I can give you the information without breaking a confidentiality agreement. Ah, here is a discussion on the openwrt mailing list: https://lists.openwrt.org/pipermail/openwrt-devel/2013-Augus... As you can see, they reported 90mb/s (they also quote 710, but I think that is the switch doing that). And that's on a mips74k. I know it's made for routers, but most likely not for doing a lot…

90Mb/s at least? Makes sense that they won't go for the gigabit Ethernet. Any idea how that compares to ARM with the same frequency? I'd say about the same. That's not bad, right?

Re: WRTnode Opened for $25

#98

Post by ajb » Wed, Aug 20, 2014, 8:46 PM UTC

listic wrote: post #97

ajb wrote: post #54

Earlier quoted context omitted.

I do, thanks.Hmm, let's see if I can give you the information without breaking a confidentiality agreement. Ah, here is a discussion on the openwrt mailing list: https://lists.openwrt.org/pipermail/openwrt-devel/2013-Augus... As you can see, they reported 90mb/s (they also quote 710, but I think that is the switch doing that). And that's on a mips74k. I know it's made for routers, but most likely not for doing a lot…

90Mb/s at least? Makes sense that they won't go for the gigabit Ethernet. Any idea how that compares to ARM with the same frequency? I'd say about the same. That's not bad, right?

I would guess about the same; I didn't have two similar ones to compare. The mips might be a bit slower though. I had the sense that the limitation was really L1 thrashing of code space, so the ARM being a bit denser might help. It would also help if the SOC had a smaller latency to memory as well - don't know what this one has.

Bear in mind that it's probably a packet rate rather than a bit rate limitation. That really bit us in our application because we were trying to run many lines of voip, which means lots of small packets. - YMMV.