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0 pointsjustincormack13y ago0 comments

IO performance on these CPUs is fairly poor, so gigabit is unlikely to actually be worthwhile.

0 comments

On my TS-7800 [1] which has GigE and a 500MHz (!) CPU, Samba outperforms the Raspberry Pi (15MB/s vs 7MB/s). Note that on the RPi not even the whole 100Mb link is utilized despite the CPU being slightly faster in general (yes, I did some benchmarks) - and the CPU on the TS-7800 was actually designed for storage applications. So there may be something on to your claim, and it would appear that CPUs that include graphics and stuff are not that good at I/O.

[1] http://www.embeddedarm.com/products/board-detail.php?product...

dredge13y ago

You may already know this, but the Ethernet controller on the Pi is actually a USB device, built into the LAN9512 [0] USB controller/hub.

The TS-7800 has a dedicated Ethernet controller, which presumably explains some of the difference.

[0] http://www.smsc.com/index.php?tid=300&pid=135

nitrogen13y ago

...it would appear that CPUs that include graphics and stuff are not that good at I/O.

I made the same observation on my blog[0]. It's a shame that decent I/O and fast CPUs/GPUs are rarely if ever combined in ARM systems. What good is a quad core CPU if you can't get any data to it?

[0] http://nitrogen.posterous.com/the-ideal-arm-platform

jrockway13y ago

That page says "Quantity 100 starts at $229." Does that mean one board is $2.29?

jmaygarden13y ago

I don't think so. Bulk pricing usually lists the per unit price. The quantity is denoted since you can get better pricing for larger quantity orders. For example, I may get a microcontroller for $4 when I order 10k, but you'd pay $25 if you just ordered one from DigiKey.

dangrossman13y ago

No, it means the price is $229 each if you order at least 100. Without the quantity discount, it's $269 each.

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