On Tue, 27 Mar 2007, DuRui wrote: > Hello everybody > > I have creat 3 endpiont, which one for intrrupt in, one for bulk in, > and the third for bluk out. my driver could reach the transport rate at > 20MB/s in 2.4 version kernel. but in 2.6 version i only got a half, 10MB/s. > the same mechanism > been used to implement driver. i confuse about it. it should faster in 2.6 > kernel. > the data mainly from host to target, and the intrrupt in recive some data > from target every 2 milliseconds.driver use a queue to submit bulk out urb, > could submit 32 urb each time. and the urb buffer is 16KB, and the intrrupt > urb is submit in intrrupt callback function. when intrrupt endpiont is > disable, the data rate from host to target may gain about 2 Mbytes. > kmalloc is used to allocate urb buf. > which aspect should take care to transplant driver from 2.4 to 2.6, and > how to optimize the usb speed? > Any comments will be appreciate !
It's possible that your driver is affected by the HZ setting. If you set CONFIG_HZ_1000 in 2.6, perhaps the throughput will improve. Alan Stern ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
