On Thu, 6 Jun 2002 19:41, Jan Menzel wrote: > Hi all, > sins I upgraded from 2.4.7 to 2.4.16 my self constructed USB > device is very slow (~ 25% of the old speed) handled by the kernel. I also > tested this with 2.4.18 and found no difference. > My computers are (a) a laptop with some Intel chipset (usb-uhci) > and (b) a desktop with some VIA chipsed (usb-ohci). The module i wrote to This isn't right. Via doesn't make any OHCI chipsets. Check what lspci -vvv shows.
> communicate with the device is attached in the archive and does basicly > only translate IOCTLs into usb_control_msg() calls. My usb device does > only communicate using the default pipe. The included test program > (measure_update.c, sorry comments only in German) does only read and write > 512 bytes from my device and counts the time. The speed was only limited > by the device. With the 2.4.7 kernel I had about 60 transfers per second. > With 2.4.16 and 2.4.18 this has dropped down to 14. I don't really have any idea (its too late to read code now, sorry), but maybe you should try 2.4.19-pre10? Let us know if anything changes. Brad -- http://conf.linux.org.au. 22-25Jan2003. Perth, Australia. Birds in Black. _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
