Answer:
The main limiting factor of any parallel computing system is communication. In a parallel computing system, multiple processors or computing devices work together to solve a problem. These processors must communicate with each other in order to coordinate their efforts and share data. However, communication can be slow and can create bottlenecks that limit the overall performance of the system.
There are several reasons why communication is the main limiting factor in a parallel computing system:
Latency: Communication between processors involves sending messages or data over a network or other communication channel. This can be slowed down by latency, which is the time it takes for a message to be sent and received.
Bandwidth: The amount of data that can be transmitted between processors is limited by the bandwidth of the communication channel. If the bandwidth is low, it can take longer to transmit large amounts of data.
Overhead: Communication between processors requires additional processing resources, such as memory and processing power. This can create overhead that reduces the overall performance of the system.
Synchronization: In some cases, processors must synchronize their efforts in order to work together effectively. This can involve waiting for other processors to complete certain tasks or exchanging data, which can slow down the overall performance of the system.
Overall, the main limiting factor of a parallel computing system is communication because it can slow down the transmission of data and create bottlenecks that limit the performance of the system.