PacketShader: a GPU-accelerated software router

Sangjin Han, Keon Jang, KyoungSoo Park, Sue Moon
Department of Computer Science, KAIST, Korea
In SIGCOMM ’10: Proceedings of the ACM SIGCOMM 2010 conference on SIGCOMM (2010), pp. 195-206.


   title={PacketShader: a GPU-accelerated software router},

   author={Han, S. and Jang, K. and Park, K.S. and Moon, S.},

   journal={ACM SIGCOMM Computer Communication Review},








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We present PacketShader, a high-performance software router framework for general packet processing with Graphics Processing Unit (GPU) acceleration. PacketShader exploits the massively-parallel processing power of GPU to address the CPU bottleneck in current software routers. Combined with our high-performance packet I/O engine, PacketShader outperforms existing software routers by more than a factor of four, forwarding 64B IPv4 packets at 39 Gbps on a single commodity PC. We have implemented IPv4 and IPv6 forwarding, OpenFlow switching, and IPsec tunneling to demonstrate the flexibility and performance advantage of PacketShader. The evaluation results show that GPU brings significantly higher throughput over the CPU-only implementation, confirming the effectiveness of GPU for computation and memory-intensive operations in packet processing.
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