On Thursday 10 November 2005 8:14 pm, Aras Vaichas wrote: > 2. Monitor the data transfer to check if: > (a) data is transferred with no errors; > (b) data is transferred with errors, but then data is re-sent > successfully; > (c) data is lost.
For (a) plus the "re-sent" part of (b), that's basic integrity testing that's hidden from userspace ... as a rule, it's implemented by host side USB controller hardware, not visible even to the kernel. You could modify some of the HCDs to notice whether re-sends were needed. As for (c), that would as a rule be a driver error. You omitted the obvious case where data could _not_ be successfully transferred, and that was reported properly to the driver. > Monitoring should include: > ... > (iii) raw and net bit error rates See above ... > ... > *(vii) operation of the "device reset detect" bit of circuitry on the > device port, and detection of that by the host. With CONFIG_USB_DEBUG you'll at least get syslog messages when devices are reset. You could filter out the ones related to the root hub ports. > (g) For immunity testing, we would require the test to run continuously, but > be > able to identify errors within one second of their occurrence. What's "immunity" testing, and how is it different from normal stress testing? > *(h) For production testing, we would want to send a fixed amount of data, > and > check the raw and net error rates. > > Can you please add a 'raw and net bit error count' monitoring output. This > will allow monitoring of the errors on a second by second basis Nope. - Dave ------------------------------------------------------- SF.Net email is sponsored by: Tame your development challenges with Apache's Geronimo App Server. Download it for free - -and be entered to win a 42" plasma tv or your very own Sony(tm)PSP. Click here to play: http://sourceforge.net/geronimo.php _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
