Dung Patrick writes: > Hi > > I have read http://people.freebsd.org/~ken/zero_copy/ > > To correctly use zero copy receive, it seems it need to set the MTU to: > have to be at least page sized, and be aligned on page boundaries.
Yes. > So is the default MTU for ethernet network card 1500 works? No, you need to have an MTU of at least PAGE_SIZE + headers. And a NIC which is smart enough to do the header splitting. Currently, the Alteon Tigon2 is the only nic which fits the bill. I keep meaning to implement header splitting in the Myricom Myrinet firmware, and I keep not getting time for it.. Note that send-side zero-copy works on any NIC, and with a standard MTU. Drew _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
