On Tue, 2007-12-04 at 12:50 -0500, Lennart Sorensen wrote: > On Mon, Dec 03, 2007 at 02:35:31PM +0200, Gilboa Davara wrote: > > Intel's newest dual 10GbE NIC can easily (?) throw ~14M packets per > > second. (theoretical peak at 1514bytes/frame) > > Granted, installing such a device on a single CPU/single core machine is > > absurd - but even on an 8 core machine (2 x Xeon 53xx/54xx / AMD > > Barcelona) it can still generate ~1M packets/s per core. > > 10GbE can't do 14M packets per second if the packets are 1514 bytes. At > 10M packets per second you have less than 1000 bits per packet, which is > far from 1514bytes. > > 10Gbps gives you at most 1.25GBps, which at 1514 bytes per packet works > out to 825627 packets per second. You could reach ~14M packets per > second with only the smallest packet size, which is rather unusual for > high throughput traffic, since you waste almost all the bytes on > overhead in that case. But you do want to be able to handle at least a > million or two packets per second to do 10GbE.
... I corrected my math in the second email. [1] Never the less, a VOIP network (E.g. G729 and friends) can generate the maximum number of frames allowed on 10GbE Ethernet which is, AFAIR just below 15M -per- port. (~29M on a dual port card) While I doubt that any non-NPU based NIC can handle such a load, on mixed networks we're already seeing well-above 1M frames per port. - Gilboa [1] http://lkml.org/lkml/2007/12/3/69 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
