Re: OMAP3 EHCI USB HS mode performance issue

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Hi Ajay,
I am transfering 100MB file to pen drive.  I have tried with pen drive with different manufacturer (Tanscend, SanDisk, Kingston).  I am using OMAP35x EVM. 

Thanks & Regards
Ganeshan

----- Original Message ----
From: "Gupta, Ajay Kumar" <ajay.gupta@xxxxxx>
To: Ganeshan N <nganeshan1@xxxxxxxxx>; "linux-omap@xxxxxxxxxxxxxxx" <linux-omap@xxxxxxxxxxxxxxx>
Sent: Wednesday, February 4, 2009 10:02:15 AM
Subject: RE: OMAP3 EHCI USB HS mode performance issue

> I am using OMAP3 based board,  running git based kernel 2..6.28, and enabled "EHCI HCD (USB 2.0)
> support", PHY mode.
> 
> EHCI HS performance is measured using Catalyst, USB analyzer. 

Are you doing bulk transfer to a pen drive to measure performance? If so then try using any USB hard disk. 
Which OMAP3 board are you using?

Ajay

> I supposed to get 480
> Mbits/s(theoritically), but getting around 80 Mbits/s for write and around 128 Mbits/s for read.
> Please suggest me some method/option to increase HS USB EHCI performance.
> 
> Thanks in advance
> Regards
> Ganeshan
> 
> 
> 
> 
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