ECET360 Lab 4
Memory Allocation Simulation
Name: ______________________ Date: _____________
1. Objectives
• To simulate First Fit and Best Fit memory allocation algorithms using C/C++
• To compare First Fit and Best Fit algorithms
2. Procedures
1) Simulate First Fit Memory Allocation Algorithm
We keep it simple. The number of memory partition (blocks) and size of processes are in units. The unit can be any size, say, 16 Kbytes or 64 Kbytes.
a. In this part of the program, you will:
• Prompt the user to enter the number of blocks (3 to 5)
• Prompt the user to enter the number of processes (3 to 5)
• You may prompt the user to enter block sizes and process sizes. You may also initialize them within the program.
• Implement the First Fit algorithm. Note that each process is checked against starting from the first block and gets allocated to the first block that fits it.
• When the process gets allocated, output the information on where it is placed and the remaining block size.
• See a sample output on next page.
b. Choose your own block and process sizes (keep them reasonable). Built and debug the program. Copy the source file below. (15 pts)
c. Run the program for three times using different sizes of blocks and processes. Crop the output windows (Snipping Tool is good to use) and paste them below. (6 pts)
2) Simulate Best Fit Memory Allocation Algorithm
a. In this part of the program, you will modify your last program to implement Best Fit algorithm.
To make the comparison meaningful, use the same sets of blocks and processes as the last part. The sample output is shown below:
b. Built and debug the program. Copy the source file below. (15 pts)
c. Run three same sets outputs as in first part. Paste the output windows below. (6 pts)
3. Conclusion
Compare and comments on the two memory allocation algorithms. Which one do you think perform better? Provide support. (8 pts)
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