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Re: measuring usb transfer throughput

On 4/4/06, johnd <john@xxxxxxxxx> wrote:
> I recently did the same thing.  I used g_ether to do my benchmarking
> and ttcp.  You can use sync to help with the caching issue
> like this:
> #mount /dev/mmc /mnt
> dd if=/dev/zero  of=/mnt/4MB_file count=4096
> #umount /dev/mmc
> sync
>
> I put that in a script
>
>
>
> also you can use the open system call with O_SYNC
>
> like this:

Thanks, I think I will use a similar method first, and then use usbfs
as suggested earlier.

> you can also try using rawdevice
>   http://www.linux.com/howtos/SCSI-2.4-HOWTO/rawdev.shtml
>

man raw(8) says this is deprecated and for non-cacheable file reads
O_DIRECT must be used instead.

Thanks,
Bahadir

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