[Soekris] net5501 USB port speed?

[Jared D. McNeill]

Malcolm Herbert wrote:
> On Mon, Jan 21, 2008 at 10:59:41AM -0800, Joel Jaeggli wrote:
> |Malcolm Herbert wrote:
> |> I'm wondering about the usual speed of the net5501 USB port, as I seem
> |> to get no better than about 700KB/s to an attached external disk.
> |
> |That sounds really close to what you'd expect from usb1, about 5.6Mb/s...
> 
> that was my thinking, yes ... 
> 
> |I'll connect one up to my soekris and see what I get.
> 
> thanks for that ... it may also be that the driver I have for USB doesn't
> recognise the chipset as being USB2-capable ... NetBSD-4.0 dmesg says:
> 
> |ohci0 at pci0 dev 21 function 0: Advanced Micro Devices CS5536 OHCI USB Controller (rev. 0x02)
> |ohci0: interrupting at irq 15
> |ohci0: OHCI version 1.0, legacy support
> |usb0 at ohci0: USB revision 1.0
> |uhub0 at usb0
> |uhub0: Advanced Micro OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> |uhub0: 4 ports with 4 removable, self powered
> |ehci0 at pci0 dev 21 function 1: Advanced Micro Devices CS5536 EHCI USB Controller (rev. 0x02)
> |ehci0: interrupting at irq 15
> |ehci0: EHCI version 1.0
> |ehci0: companion controller, 4 ports each: ohci0
> |usb1 at ehci0: USB revision 2.0
> |uhub1 at usb1
> |uhub1: Advanced Micro Devices EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
> |uhub1: 4 ports with 4 removable, self powered
> 
> These two lines seem to be the culprit:
> 
> |ohci0: OHCI version 1.0, legacy support
> |usb0 at ohci0: USB revision 1.0

This should be fine, so long as your USB hard disk is attaching to uhub1 
and not uhub0.

> ... so, I wonder if I'd get a better response from using the internal USB port or
> somehow the driver binding is ohci first then ehci ... 
> 
> |> I haven't yet worked out where the bottleneck is, but a 250GB RAID
> |> mirror is expected to take 4 days to sync, which seems to be a little 
> |> too long to me ... it also seems to pound the CPU pretty hard when
> |> I do any sustained USB traffic ... 
> |
> |So there's two disks in an external enclosure and one is being copied to
> |the other?
> 
> no, one internal 2.5in 250GB PATA disk and one external USB disk in an enclosure
> which has gotten good reports from the vendor, hence my surprise at the performance
> 
> I'll ask around on the netbsd-users list to see if I can either suppress ohci or
> reorder their binding and see if that makes a difference ...

I see about 12MB/s read times from an external USB 2.0 disk using LFS on 
NetBSD 4.99.22. What are you using to test?

Cheers,
Jared