GAMT: A Fast and Scalable IP Lookup Engine for GPU-based Software Routers
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GAMT: A Fast and Scalable IP Lookup Engine for
GPU-based Software Routers
Author: Yanbiao Li, Dafang Zhang, Alex X. Liu and Jintao Zheng
Publisher: ANCS '13 Proceedings of the ninth ACM/IEEE symposium on Architectures for networking and communications systems
Presenter: Tung-yin Chi
Date: 2015/10/14
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Introduction
The GPU is becoming an emerging platform for high performance general-purpose computing.
J. Zhao et al. [27] - GPU-Accelerated Lookup Engine (GALE)• only applicable for IPv4• decline sharply with the increase of update frequency
GPU-Accelerated Multi-bit Trie (GAMT)• Scale to IPv6 smoothly• Keep stable lookup throughput under highly frequent updates• Improve lookup performance with latency controlled
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Background and Related Work
Multi-bit Trie
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Background and Related Work
CUDA Programming Model• Coalescence of Global Memory Accesses• Overlapping Behaviors on the GPU
GPU-Accelerated IP Lookup Engine
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GPU-accelerated Multi-bit Trie
Encoding Rules and Lookup Approach
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GPU-accelerated Multi-bit Trie
Encoding Rules and Lookup Approach• Ex : 10001*
• Step 1. Default (inf, jump) = (0, 1)• Step 2. (inf, jump) = (0 + 1, 1) = (1, 1) => (inf, jump) = (0, 2) • Step 3. (inf, jump) = (0 + 0, 2) = (0, 2) => (inf, jump) = (0, 3) • Step 4. (inf, jump) = (0 + 1, 3) = (1, 3) => (inf, jump) = (5, 0)
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GPU-accelerated Multi-bit Trie
Encoding Rules and Lookup Approach
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GPU-accelerated Multi-bit Trie
Update Mechanism
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GPU-accelerated Multi-bit Trie
Update Mechanism
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GPU-accelerated Multi-bit Trie
Architecture Overview
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Performance Optimization Optimized Multi-bit Trie
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Performance Optimization Optimized Multi-bit Trie
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Performance Optimization Delete in Lazy Mode Multi-Stream Pipeline
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Experimental Evaluation
Evaluation Methodology
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Experimental Evaluation
Evaluation Methodology
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Experimental Evaluation
Lookup Performance
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Experimental Evaluation
Lookup Performance
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Experimental Evaluation
Lookup Performance
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Experimental Evaluation
Update Overhead
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Experimental Evaluation
Comprehensive Performance