On Mon, 28 Feb 2000, jamal wrote:
> I _have_ measured the number of interupts per second that a PC could
> withstand running Linux; This is very recent.
> I was able to get something around 90K/sec when forwarding without utterly
> slowing down the system; At 64byte packets thats close to 100Mbps; at
> 640Byte packets thats close to 1Gigabit. This is of course without turning
> on Alexeys fast forwarding core. I think at some point the PCI bus becomes
> your bottleneck.
Raw PCI 2.1 bus in a PC is 1056Mbps (32bit, 33Mhz) minus
overhead. IIRC the Cisco 7206VXR is rated for 600Mbit *max* sustained
traffic over its main bus (33Mhz 32bit PCI) given the 600 - 800 Mbps a
high end linux system can do. (Remember though, shared HD bus, this
is *total* transfer, not network transfers each way)
I keep thinking of the Alpha units running all 64bit PCI 2.1
with a better memory system to boot.
PCI 2.1 *raw* rates
-------------------
32bit 33Mhz 1056Mbps
64bit 33Mhz 2112Mbps
64bit 66Mhz 4224Mbps
---
As folks might have suspected, not much survives except roaches,
and they don't carry large enough packets fast enough...
--About the Internet and nuclear war.
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