Hi Greg, I want to test the performance of a linux box (and the serial subsystem) that is connected to the internet with multiple (lets say 5 for this example) usb data sticks running at speed above 7.2MBs. I then end up with multiple ppp devices ppp0 to ppp4. My interest is whether this setup would be capable of e.g. downloading 5 different files from 5 different ip addresses (having set the routes properly to use the respective pppX device) at speeds around 50MBit/s? Thanks for your help so far, Axel > -----Ursprüngliche Nachricht----- > Von: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb- > owner@xxxxxxxxxxxxxxx] Im Auftrag von Greg KH > Gesendet: Montag, 13. September 2010 18:42 > An: Axel C. Voigt > Cc: linux-usb@xxxxxxxxxxxxxxx > Betreff: Re: artificial USB test environment, any help appreciated > > On Mon, Sep 13, 2010 at 06:23:32PM +0200, Axel C. Voigt wrote: > > Hello list, > > > > I am let alone with creating a linux process or kernel module that > creates a > > virtual tty interface on one side and connects directly to the > > usbserial/ttyACM module (as if it were a usb serial device such as a > modem) > > on the other end to be able to test the serial performance of a linux > host. > > > > When achieved, I am planning to start a pppd on both sides to create a > > tcp-over-serial connection to transfer data such as an ftp up/download as > if > > I were connected to the internet with a UMTS mobile phone or UMTS usb > stick. > > This could then be evolved to have multiple "virtual" UMTS sticks > connected > > to one linux host to generate load at the linux usb serial layer and is > > necessary since I want to be able to ensure that the new speed classes of > > serial devices such as HSDPA usb sticks (3.6 or 7.2MBit/s) or even DC- > HSPA > > (> 50MBit/s) will work flawlessly even when you connect multiple sticks > to > > one host. > > What is your goal here? To test your virtual devices? Or something > else? I don't seem to understand what exactly you are needing to test. > > thanks, > > greg k-h > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
