On Sat, Jul 27, 2013 at 9:22 AM, Andre Oppermann <an...@freebsd.org> wrote:
> On 27.07.2013 10:42, Alexander V. Chernikov wrote: > >> On 27.07.2013 12:15, Luigi Rizzo wrote: >> >>> On Sat, Jul 27, 2013 at 10:02 AM, Alexander V. Chernikov >>> <melif...@freebsd.org> wrote: >>> This makes me curious because i believe people have used netmap with >>> the 82598 and achieved close to line rate even with 64-byte frames/one >>> port, >>> and i thought (maybe I am wrong ?) the various 2-port NICs use 4 lanes >>> per port. >>> So the number i remember does not match with your quote of 2.5Gt/s. >>> Are all 82598 using 2.5GT/s (which is a gen.1 speed) instead of 5 ? >>> >> > > >> Quoting 82598EB datasheet: >> The PCIe v2.0 (2.5 GT/s) interface is used by the 82598EB as a host >> interface. It supports x8, x4, >> x2 and x1 configurations at a speed of 2.5 GHz. The maximum aggregated >> raw ban.. >> >> Actually I discovered this exactly with netmap and 82598*-DA2 NIC :) >> > > Discussing the 82598 is moot because it has been replaced with the 82599 > which supports x1-x8 at 5 GT/s. AFAIK you can't event buy the 82598 > anymore. > > Yes, and the new quad port adapters on PCIE Gen 3 give you 8GT/s bandwidth for the device. I'm not sure if you could buy the 82598 but I surely would not recommend it to anyone :) Jack _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
