Re: measuring usb transfer throughput

[Ming Zhang <mingz@xxxxxxxxxxx>]

open that file with O_DIRECT flag

or u can use sg_dd to read u usb device like /sdX directly with
o_direct=1. man sg_dd for information. search sg3_utils via google to
get this.

ming

On Tue, 2006-04-04 at 16:13 +0100, Bahadir Balban wrote:
> Hi,
> 
> I am trying to measure usb transfer throughput by timing file read
> operations from a usb flashdisk into main memory. The results seems to
> be imprecise and I suspect this is due to filesystem caching. How
> could I prohibit filesystem caching in the kernel?
> 
> Do you know of any GPL'ed usb benchmarks? Maybe I should measure this
> in the kernel rather then application space?
> 
> Thanks,
> Bahadir
> 
> --
> Kernelnewbies: Help each other learn about the Linux kernel.
> Archive:       http://mail.nl.linux.org/kernelnewbies/
> FAQ:           http://kernelnewbies.org/faq/
> 


--
Kernelnewbies: Help each other learn about the Linux kernel.
Archive:       http://mail.nl.linux.org/kernelnewbies/
FAQ:           http://kernelnewbies.org/faq/