Dissertation > Excellent graduate degree dissertation topics show

Research and Implementation of an Efficient Interaction Mechanism of Hardware and Software Supporting Zero-copy Technology in CIA Network Card

Author: LvMinQiang
Tutor: WuChunQing
School: National University of Defense Science and Technology
Course: Computer Science and Technology
Keywords: DMA engine Descriptor Interrupt Zero-copy
CLC: TP393.08
Type: Master's thesis
Year: 2008
Downloads: 70
Quote: 0
Read: Download Dissertation


In today's increasingly large-scale networks, packet capture and analysis techniques are being widely used. Packet capture analysis, real-time understanding of the use of the network, analyzing the bottleneck of the network operation, discovered network packet carrying illegal content. Traditional packet capture system based on general considerations, will spend a lot of resources for interrupt overhead and memory copy overhead, the system call overhead and protocol processing overhead. To improve the performance capture packets, packet capture system widely adopted zero-copy technology. Packet capture system with zero-copy technology to achieve a zero system call, zero memory copy, while avoiding the complexity of the kernel protocol processing, greatly improve the performance of packet capture system. However, the zero-copy packet capture system is not considered to reduce interrupt overhead. To reduce interrupt overhead, to further improve the performance of zero-copy packet capture system is the purpose of this study. Interrupt overhead related to the interrupt processing of the memory data of the network adapter and the host exchange and Linux systems on the network adapter. Work and innovation of the main points include: 1. Analysis of the high-speed network adapters and host memory data exchange, that using DMA chain transfer and command queue transmission combination, this approach requires the host memory and network adapter hardware storage space set the descriptor buffer; 2. analysis of the network adapter Get descriptor way, based on the drive way and DMA engine based on the way; 3 host memory and the network adapter the the hardware descriptor buffer model, quantitative analysis of the relationship of the various parameters that affect the size of the buffer, provide theoretical guidance for the design of the CIA NIC project; 4. analysis of the Linux system on the network adapter interrupt processing, analysis interruption the advantages and disadvantages of the driver and poll-driven mechanism proposed semi-polling driven mechanism to reduce interrupt overhead. Used in the network adapter hardware interrupt merging technique to reduce the number of interrupts. In order to reduce the Linux system on the network adapter interrupt processing time proposed using the buffer pool technology, pre-allocated a certain size of the data buffer in user space, to avoid the need to apply to the system buffer each interrupt handling, at the same time avoid an unnecessary copy process packets from kernel space to user space, the so-called zero-copy technology.

Related Dissertations

  1. Research on Feature Extraction and Classification of Tongue Shape and Tooth-Marked Tongue in TCM Tongue Diagnosis,TP391.41
  2. SIFT-based digital watermarking algorithm,TP309.7
  3. Water Carriage of Goods by the legal system of the Limitation of Actions,D922.294;D923.1
  4. Some Tardiness Problems with Machine Disruption,O223
  5. Observer-Based Passive Congtrol of Descriptor Systems with Time Delay,TP13
  6. Distributed network devices online update system software design,TP311.52
  7. The Design Development of Three-phase Six Lines Signal Generator Based on DDS Technology,TM935
  8. Research of Robust Model Predictive Control for Uncertain Singular Systems,TP13
  9. Robust Control of Multi-time Delay Singular Systems with Linear Fractional Parametric Uncertainties,TP13
  10. Research on Proportional-plus-derivative Feedback Guaranteed Cost Control of Descriptor Systems,TP13
  11. Observer Design for a Class of Nonlinear Descriptor Systems,TP13
  12. Study on Computer Systems and Control Software of K1000 Welding Machine,TG438.2
  13. On the Contact of Criminal Intention for Joint Offense,D914
  14. The Research of Key-techniques in Disruption-tolerant Network Routing,TN929.5
  15. Optimized Handover Schemes for the High Speed Train-Ground Wireless Communication System,TN929.5
  16. Infrared remote control car Atmega16 based system design,TP872
  17. The Kernel Research of Real Time Operating System and the Hardware Implementation of Interrupt Management,TP316.2
  18. On the Proof of Interrupt of Negative Prescription for Requests,D925
  19. The Prescription Barriers Mechanism of China,D923
  20. Based μC/OS- Ⅱ UAV flight control system software design,V249.1
  21. A Study of Interruption Behaviors in a Chinese Intensive Reading Class at the Inermediate Level,H195

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
© 2012 www.DissertationTopic.Net  Mobile