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BestFitFixedMemory.py
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BestFitFixedMemory.py
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# This is a Python Implementation of Best Fit Memory Allocation Algorithm (Fixed Size Memory Blocks)
#
# Psuedo Code for the algo is as:
#
# Initialize a list of memory blocks with fixed sizes.
# Create a list of free memory blocks initially containing the entire memory.
# When a new process requests memory allocation:
# a. Iterate through the list of free memory blocks.
# b. Find the free memory block with the smallest size greater than or equal to the requested size.
# c. If a suitable free memory block is found:
# i. Allocate the memory block to the process.
# ii. Update the size of the memory block to reflect the allocated size.
# iii. Remove the allocated memory block from the list of free memory blocks.
# iv. Return the starting address of the allocated memory block to the process.
# If no suitable free memory block is found:
# indicate that memory allocation failed.
def best_fit_fixed_memory():
p = int(input("Enter number of processes: "))
n = int(input("Enter number of memory blocks: "))
process = []
memory = []
memory_best_fit = []
for i in range(n):
memory_block = int(input(f"Enter input for memory block #{i + 1}: "))
memory.append(memory_block)
for i in range(p):
memory_required = int(input(f"Memory required for process #{i + 1}: "))
process.append(memory_required)
memory_best_fit = memory.copy()
temp = sorted(memory)
output_best_fit = [-1] * p
for i in range(p):
for j in range(n):
if temp[j] >= process[i]:
output_best_fit[i] = temp[j]
temp[j] = -1
break
print()
print("Process No.\tMemory Block Allocated in Best Fit")
for i in range(p):
print(f"{i + 1}\t\t\t", end="")
if output_best_fit[i] == -1:
print("Memory not allocated\t")
else:
print(f"{output_best_fit[i]}\t\t\t")
print()
best_fit_fixed_memory()