Available Bandwidth Measurement Using Real Time Operating Systems

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Available Bandwidth Measurement Using Real Time
Operating Systems

• Dennis S. Knoop

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Proposal

• The goal of this project is to study the
  effectiveness of using a Real Time Operating
  System to improve the accuracy of network
  measurement.

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Historical Background

• BPrope and Cprobe developed by
• Tool uses ICMP echo request
• UCCS students, under the supervision of Dr. Chow,
  have modified the available bandwidth tool
• Sending time gaps are still a problem

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Project Plan

• Analyze current ABWM Tool
• Research Real-Time Operating Systems
• Load Real-time operating system
• Port current ABWM Tool to RTOS
• Analyze results

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Real Time Operating Systems

• Basic Concepts

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UC/II

• Strengths
• Weaknesses

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RTLinux

• Strengths
• Weakneses

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RTLinux

• Basic Concept
• Modules
• Scheduling
• Threads

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ABWM Tool

• Original Tool
• Analysis
• Improvements needed
• Timing of initial time gaps
• Re-Engineering/Port needed

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RTABWM Tool

• Modification Made
• Critical Code
• Accuracy of results

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Linux Schedulers

• SCHED_OTHER
• SCHED_RR
• SCHED_FIFO

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Comparison of Results
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Current Status

• Analyzed current ABW Tool
• Research Real Time Operating Systems
• Chose RTLinux as RTOS of choice
• Loaded RTLinux on viva.uccs.edu server
• Ran sample/example programs
• Working on Port of ABW Tool to RTLinux

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Conclusion

• Result of testing
• Future Work
• Questions?