Final answer:
In symmetric multiprocessing (SMP) systems, multiple CPUs share main memory and are controlled by a single operating system, providing better performance, reliability, and scalability; however, they may suffer from increased complexity, higher costs, and diminishing performance returns with the addition of more processors.
Step-by-step explanation:
Pros and Cons of Symmetric Multiprocessing (SMP)
When discussing the architecture of multiprocessor systems, symmetric multiprocessing (SMP) is a common configuration where two or more identical processors are connected to a single shared main memory and operate under the control of a single operating system instance. These systems are known for providing increased reliability, performance, and efficiency.
Pros of SMP
- Performance: With multiple processors handling tasks concurrently, the overall speed and efficiency of the system can increase significantly, particularly for parallel processing tasks.
- Reliability: If one processor fails, the system can continue functioning using the remaining processors.
- Scalability: Additional processors can be added to boost system capabilities as needed.
Cons of SMP
- Complexity: The architecture and operating system need to manage multiple processors, which can introduce complexity in system design and software.
- Cost: Multiprocessor systems can be more expensive due to additional hardware and potentially more sophisticated software requirements.
- Diminishing returns: Adding more processors can lead to bottlenecks in other system components, and the performance gains might not be linear.