Re: question about usbtest.c, test.sh and testusb.c?
David Brownell <[email protected]>
| Newsgroups | gmane.linux.usb.devel |
|---|---|
| Message-ID | <[email protected]> |
> > > > The buffer is created in usbtest.c:iso_alloc_urb(), at the point where it > > calls usb_buffer_alloc(). > > Actually cant i fill this buffer in user space? No. > it is more logic to fill the buffer in the user-space (testusb.c) > then let the usbtest.c module send the iso-packet that contains the > data of the filled buffer. Not really ... remember that one of the things being tested is whether certain kinds of operation trigger low level races in peripheral and/or host side controller drivers. Forcing round-trip delays to userspace in the critical between-packets paths would prevent such testing. ------------------------------------------------------------------------- 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 _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel