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Profile & Optimize the Performance of a Web Proxy on a Multi Core Platform

This project focuses on enhancing the performance of a web proxy running on multi-core platforms through the implementation of the NAPI driver. By targeting the reduction of packet interrupts, we aim to significantly increase throughput for handling various file sizes. Initial evaluations reveal high CPU utilization for large files and lower for small files, prompting the need for optimization. Our approach includes thorough data collection, analysis, and comparison of throughput before and after NAPI implementation. The research is backed by findings from the iMPACT Lab at Arizona State University.

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Profile & Optimize the Performance of a Web Proxy on a Multi Core Platform

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  1. Profile & Optimize the Performance of a Web Proxy on a Multi Core Platform Eddie Beaumont, Estera Bogdan, Jen Dischler, Francisco Felix, & Scott Oehrlein

  2. Network Topology

  3. iMPACT Lab

  4. Background • Large files (3K - 7M) • 100% proxy CPU utilization • Small files ( < 3K) • ~33% proxy CPU utilization “Performance Evaluation and Analysis of Web Transcoding Proxy Systems”, iMPACT Lab, Arizona State University

  5. Problem Statement “Decrease the number of interrupts for received packets in order to increase throughput of the proxy.” Throughput = # of packets/second

  6. Motivation Decreased interrupt requests = Increased throughput IRQ1 IRQ2 time Non-NAPI NAPI

  7. Approach • Acquire initial data by testing throughput • process as many packets as possible (fixed amount of time) • Create pertinent graphs, equations, etc. required for analysis • Download & install NAPI driver • Re-run throughput tests with new driver settings • Compare results with initial results • VTune analysis before & after NAPI implementation

  8. Analysis Before NAPI Implementation

  9. Analysis Cont. Interrupts/sec Connection requests/sec

  10. Conclusion With the NAPI driver, we expect the throughput to be increased due to the significant decrease in packet interrupts.

  11. Work Distribution • Eddie • Data collection and analysis • Estera • Project management and data analysis • Jen • Presentation coordination and data analysis • Francisco • Data collection and analysis • Scott • Data collection and analysis

  12. Questions?

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