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Implementation of malloc and free

Using a simple process generator generate a set of 50 processes with different memory and cycle (i.e. runtime)

requirements. The memory requirements for processes are in the range of <10KB, 2MB> and the runtimes range

between 200 and 2,500 cycles. You may assume that the processes arrive in the system every 50 cycles (e.g., at

times 0, 50,100, 150, 200, …etc.). Upon arrival, the system will allocate the required memory for each process,

however, a process can only start executing if the required memory is available and can be allocated. After the

process has completed the number of required cycles, the system will free the memory that was allocated to this

process.

1. Assuming that the combined memory requirement of all 50 processes is less than 100 MB, use the system

calls malloc() and free() to dynamically allocate and de-allocate memory to your processes. Measure the

total system time that is required to simulate the execution of your 50 processes.

2. Develop your own memory management system using dynamic partitioning with corresponding function

calls my_malloc() and my_free() to manage a pre-defined block of memory of size 100 MB. The function

my_malloc() will try to find the required chunk of memory within the pre-defined 100 MB block and

allocate it to an arriving process. Upon completion, the memory partition is returned to the memory pool

via the function my_free(), to be used by other processes. Compare the performance of your memory

manager to the performance of malloc() and free(). Note that your memory manager only calls the

system’s malloc() once to request the initial 100 MB block, hence you are reducing the number of context

switches.

3. Develop your own memory management system using fixed (static) partitioning with corresponding

function calls my_malloc() and my_free() to manage a pre-defined block of memory of size 100 MB. You

will partition the available memory into uniform 5 MB regions. Compare the performance of your dynamic

memory management approach used above.

Skills: C Programming, C# Programming, C++ Programming, Java, Software Architecture

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