The MOSS CPU Scheduling Simulator

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The MOSS CPU Scheduling Simulator

• By
• Jim Scott
• Justin McGinley
• Steve Smokowski

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MOSS A Mini Operating-System Simulator

• Developed at Kent University
• Maintained by Fred Barnes, a computer science
  professor
• MOSS is a miniature Java-based operating-system
  simulator
• Runs on the Java Virtual Machine

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MOSS Explained

• Operating System simulator written in JAVA
• Modeled after UNIX/Linux
• Emulates parts (but not all) of an OS
• Kernel
• System Calls
• User and kernel processes
• CPU process scheduling

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Moss has shortcomings

• Not yet fully functional
• Processes and file-system ignore access rights
• Few device drivers
• Incomplete file-system implementation
• No implementation of Memory Management
• Limited performance reporting available
• Other than error messages, no feedback is
  provided about performance
• No way to benchmark

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Why MOSS?

• MOSS was created By a Professor as an educational
  tool.
• Allows a student to alter a

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Operating Systems are hard to design.

• They are typically written in C