MPC8347 USB problem : Copying big file[>150MB] discontinuous via Samba

MPC8347 USB problem : Copying big file[>150MB] discontinuous via Samba

[Sam Song]

Hi all,

We met a USB performance problem on a custom 8347

board with 2.4.31. When copying small files no 
more than 100MB in size, it worked smoothly with 
NEC or VIA PCI card. But copying a big file like 
more than 150MB in size would decrease the
copying
speed a lot. Serial console even couldn't
response 
'ls' command. The target has a 128MB DDR RAM.

While the same driver with 2.4.31 worked fine on
a 
8248 custom board. What could the problem be?

Sorry to distrub you during Christmas Time.

Thanks in advance,

Sam


Best regards,

Sam

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Re : MPC8347 USB problem : Copying big file[>150MB] discontinuous via Samba

[Sam Song]

Sam Song <samlinuxppc@yahoo.com.cn> wrote:
> Hi all,
> 
> We met a USB performance problem on a custom
> 8347board with 2.4.31. When copying small 
> files no more than 100MB in size, it worked 
> smoothly with NEC or VIA PCI card. But 
> copying a big file like more than 150MB 
> in size would decrease the copying
> speed a lot. Serial console even couldn't
> response 'ls' command. The target has a 
> 128MB DDR RAM.

Ummm, actually, 256MB DDR RAM.

> While the same driver with 2.4.31 worked fine
> on a 8248 custom board. What could the 
> problem be?

Arhhhh, it was due to USB 1.1 limitation
itself(8347 USB 2.0 driver wasn't added 
yet when I posted it). Only on the 
workable 8248 target with USB 1.1 driver, 
it would have such a phenomena. There was 
even a network error displayed. If working
with USB 2.0, no any problem. New to me:-)

But Well, I don't have the guts
to say this is a kernel's bug:-)

> Sorry to distrub you during Christmas Time.

OK, stay on relax, pls.

Best regards,

Sam

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