Dung Patrick writes: > Correct me if I am wrong: > > To use the zero copy 'receive' on i386, you need to set the MTU to 4096 bytes(page > size) or 4096 multiples.
No, just larger than a page-size plus headers. FreeBSD's tcp automagically sets the mss to a page-sized multiple for large MTUs. And you need a nic which can do header splitting (ie, DMA the headers and the payload to different places in the host). > If it is true, until zero copy receive can do auto fitting, I think zero copy > receive is more useful in gigabit ethernet than in fast ethernet (I assume MTU > 1500(or smaller) is suitable for fast ethernet/Internet.) Fast ethernet is slow enough, it doesn't really make sense there. These days, one could argue that it really only makes sense for 10GbE. Drew _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
