Well, this page http://processors.wiki.ti.com/index.php/AM335x-PSP_04.06.00.06_Features_and_Performance_Guide#USB_Drivercertainly suggests that the BBW can do much better. I'll try to investigate this further ...
On Tuesday, November 5, 2013 3:53:42 PM UTC+1, Juanjo wrote: > > It seems 3.12 has DMA support enabled for USB (3.8 isn't) so it should be > a bit better or at least not choke the CPU on interrupts. > > Anyway it seems USB isn't the brilliant part of the BBB :( > > Maybe the BBW with 3.2 runs faster on USB. > > On Saturday, November 2, 2013 12:22:45 PM UTC-3, [email protected] wrote: >> >> I'm trying to use the BBB as a (very) lightweight NAS. Unfortunately, I'm >> a bit disappointed with the transfer speed I can achieve over the USB port. >> I've now tried different kernels such as Robert C Nelsons 3.8.13-bone28 and >> 3.12.0-rc5-bone6, different USB storage devices (such as a USB 2.0 flash >> drive and a USB 3.0 hard disk), and tried both directly attaching the flash >> drive to the BBB as well as using a powered USB hub. The HD of course only >> works on the hub. The BBB is running on a 5V external power supply. >> >> Using different tools (hdparm and dd) the USB read speed always maxes out >> at about 9MB/s which is far less than the same devices deliver on other >> systems (e.g. about 25MB/s on my Raspberry Pi). >> >> Does anyone have an idea why this is the case or how this can be improved? >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
