USENIX 2001 Abstract
Flexible Control of Parallelism in a Multiprocessor PC Router
Benjie Chen and Robert Morris, Massachusetts Institute of Technology
SMP Click is a software router that provides both
flexibility and high performance on stock multiprocessor
PC hardware. It achieves high performance using device,
buffer, and queue management techniques optimized for
multiprocessor routing. It allows vendors or network
administrators to configure the router in a way that
indicates parallelizable packet processing tasks, and
adaptively load-balances those tasks across the
SMP Click's absolute performance is high: it can forward
494,000 64-byte IP packets per second on a 2-CPU 500 MHz
Intel Xeon machine, compared to 302,000 packets per
second for uniprocessor Click. SMP Click also scales
well for CPU intensive tasks: 4-CPU SMP Click can
encrypt and forward 87,000 64-byte packets per second
using IPSec 3DES, compared to 23,000 packets per second
for uniprocessor Click.
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