Jack Vogel wrote: > On 6/11/07, Andre Oppermann <[EMAIL PROTECTED]> wrote: >> Jack Vogel wrote: >> > On 6/11/07, Andre Oppermann <[EMAIL PROTECTED]> wrote: >> >> Jack Vogel wrote: >> >> > On 6/11/07, Jack Vogel <[EMAIL PROTECTED]> wrote: >> >> >> On 6/11/07, Sam Leffler <[EMAIL PROTECTED]> wrote: >> >> >> > Andre Oppermann wrote: >> >> >> > > andre 2007-06-11 20:08:12 UTC >> >> >> > > >> >> >> > > FreeBSD src repository >> >> >> > > >> >> >> > > Modified files: >> >> >> > > sys/net if.h >> >> >> > > Log: >> >> >> > > Add IFCAP_LRO flag for drivers to announce their TCP Large >> >> >> Receive Offload >> >> >> > > capabilities. >> >> >> > > >> >> >> > > Revision Changes Path >> >> >> > > 1.108 +1 -0 src/sys/net/if.h >> >> >> > > >> http://cvsweb.FreeBSD.org/src/sys/net/if.h.diff?r1=1.107&r2=1.108 >> >> >> > > >> >> >> > > >> >> >> > There are many offload capabilities defined that are not well >> >> thought >> >> >> > out. In particular we do not distinguish between ipv4 and >> ipv6 for >> >> >> > things like cksum and tso so there's no way to disable individual >> >> >> > features. The ability to tweak LRO is clearly needed and clearly >> >> >> belong >> >> >> > as an ifnet capability but unilateraly deciding this is the wrong >> >> >> approach. >> >> >> > >> >> >> > Sam >> >> >> >> >> >> We do distinguish between TSO4 and TSO6, its just that all the >> pieces >> >> >> for 6 arent actually there yet, you are right about the cksum >> >> >> granularity, >> >> >> but I'm not convinced its needed. You might be right on the need to >> >> >> fine tune the functionality, but having a big ON/OFF doesnt seem a >> >> >> bad thing to me. >> >> > >> >> > Oh, one other useful tidbit, for Oplin when RSS is enabled you >> can't do >> >> > CKSUM anyway, they reuse bits. >> >> >> >> What is Oplin? >> > >> > Our new 10G adapter, er, its code name, its really 82598. >> >> OK, then what is this 'RSS' feature? > > I think its a windowism, stands for Receive Side Scaling, and what it means > is multiple receive queues, each with an MSI/X vector so they can interrupt > different CPUs, or they can be tied to virtual guests, or MACs, etc etc...
To the best of my knowledge, it is a Solarisism and the 10G cards from Sun (now licensed to Marvel?) are already delivering this. What would be interesting is if you could tie specific rx/tx rings, interrupts, CPUs, etc, to jails... Darren _______________________________________________ cvs-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/cvs-all To unsubscribe, send any mail to "[EMAIL PROTECTED]"
