Hi Mike yes this is expected, ZC adds some padding for performance reasons.
Alfredo > On 09 Oct 2015, at 17:49, Michael Nicolazzo <[email protected]> wrote: > > Alfredo, > > I finally got it to work. It appears I needed to call max_packet_len from > zutils.c. I assume something in there, maybe open_pfring, is needed to get > the zc-aware driver to accept the zc open device call. But one thing I find > puzzling. Our MTU is set to 2048. When I open the device with the standard > driver call (no zc:), max_packet_len return 2066. But when I open it > zc-aware, it returns 3072. Is this expected? > > Mike > >> On Oct 6, 2015, at 9:50 PM, Michael Nicolazzo <[email protected]> >> wrote: >> >> OK, thanks. Haven’t gotten it to work yet, but I’ll play with the buffer >> allocation a bit more. >> >> Mike >> >>> On Oct 6, 2015, at 6:00 PM, Alfredo Cardigliano <[email protected]> >>> wrote: >>> >>> Hi Mike >>> it seems the buffer_len parameter you are passing to >>> pfring_zc_create_cluster() is not big enough, >>> please refer to zcount to get the correct value. >>> >>> Alfredo >>> >>>> On 06 Oct 2015, at 23:57, Michael Nicolazzo <[email protected]> >>>> wrote: >>>> >>>> Hi, >>>> >>>> I have an issue with my application using ZC and I hope you can provide >>>> some insight to where the problem might be. The application runs perfectly >>>> using standard drivers. But when I run the ZC aware driver (ixgbe) and >>>> attempt to open the device with zc:eth3, the call to pfring_zc_open_device >>>> fails with errno = 94. Zcount runs fine, so I assume I have installed the >>>> driver properly. Any thoughts? >>>> >>>> Thanks, >>>> >>>> Mike >>>> >>>> _______________________________________________ >>>> Ntop-misc mailing list >>>> [email protected] >>>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >>> >>> _______________________________________________ >>> Ntop-misc mailing list >>> [email protected] >>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >> > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc _______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc
