OK, I did a different experiment this time by putting each channel about 5 feet apart and 10 feet apart between computers. Walla, I got double the speed. Basically, my channels were too close to each other. After all, Greg was right, it was a nature of the wireless. Sorry for all the trouble for you guys.
Thanks and regards, Adisorn. --- aermongk <[EMAIL PROTECTED]> wrote: > Hi Alan, > > I did indeed miss your email and I am sorry about > that. > The other USB device is the card reader which is > built-in > with the PC and I don't have anything plug to it. > It would > be hard for me to remove it. > > BTW, I have new finding last night. I searched > through > the wireless driver forum of the device I am using > and > found this post. It seems that this guy has the > same > issue as I do. And he is not using the USB wireless > device. > > http://rt2x00.serialmonkey.com/phpBB2/viewtopic.php?t=914&highlight=channels > > I need to do more investigation since one of my > experiment > contradicts his finding. One of my experiment is > the one > I described before with 4 computers with each > channel > per computer. I don't see the drop in the speed > when I > use 4 computer. Anyway, more research. > > Thanks Alan, Oliver, and Greg for your response. I > will let > you know if I discover anything. > > Regards, > Adisorn. > > > > Alan Stern wrote: > > >On Mon, 22 May 2006, aermongk wrote: > > > > > > > >>Hi USB guru, > >> > >>Here is the update on my testing. I went out and > bought 2 more USB > >>wireless devices > >>with different chipset. The original device is > DLink DWL-G122 with > >>Ralink chip > >>and new device is DLink DWL-AG132 which has > Atheros chip. This is to > >>make sure > >>that I am using different driver for each device. > I then hooked both > >>DWL-G122 and > >>DWL-AG132 up to a PC and installed their driver > and did the same to > >>another PC. > >>Run one channel at a time with ttcp, speed is good > as expected. Again, > >>when I ran > >>both of them simultaneously, their speed drop > again, same result as my first > >>experiment. > >> > >>I couldn't explain why when I ran Wireless + Flash > devices simultaneous, > >>the wireless > >>speed didn't drop (Hope I didn't do anything wrong > here. Basically, I > >>just copied a > >>large file to Flash device (cp command followed by > sync command) and at > >>the same > >>time run "ttcp"). But when I ran 2 different > Wireless devices, > >>their speed dropped. > >>Any suggestion? > >> > >> > > > >No. This merely suggests that the slowdown isn't > caused by anything in > >the USB stack. > > > > > > > >>BTW, Alan, do you have chance to look at the > usbmon files I sent you? I > >>tried to post my > >>zip file to the forum but got rejected. I browse > through them and > >>didn't spot anything. > >> > >> > > > >I did look at them. Apparently you missed my > response: > > > >http://marc.theaimsgroup.com/?l=linux-usb-users&m=114796416906901&w=2 > > > >Alan Stern > > > > > > > >------------------------------------------------------- > >Using Tomcat but need to do more? Need to support > web services, security? > >Get stuff done quickly with pre-integrated > technology to make your job easier > >Download IBM WebSphere Application Server v.1.0.1 > based on Apache Geronimo > >http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > >_______________________________________________ > >[email protected] > >To unsubscribe, use the last form field at: > >https://lists.sourceforge.net/lists/listinfo/linux-usb-users > > > > > > > > > > ------------------------------------------------------- > All the advantages of Linux Managed Hosting--Without > the Cost and Risk! > Fully trained technicians. The highest number of Red > Hat certifications in > the hosting industry. Fanatical Support. Click to > learn more > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642 > _______________________________________________ > [email protected] > To unsubscribe, use the last form field at: > https://lists.sourceforge.net/lists/listinfo/linux-usb-users > ------------------------------------------------------- All the advantages of Linux Managed Hosting--Without the Cost and Risk! Fully trained technicians. The highest number of Red Hat certifications in the hosting industry. Fanatical Support. Click to learn more http://sel.as-us.falkag.net/sel?cmd=lnk&kid=107521&bid=248729&dat=121642 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
