GIOS P2L5 - Part 2

What is one way to circumvent the issue of a user level thread blocking the entire process in the event-driven model?

• Use asynchronous I/O operations

• Use synchronous I/O operations

• Use multithreaded kernel

• Use multithreaded boss/workers configuration

What is the purpose of using helpers in the event-driven model?

• To handle blocking I/O operations and interact with the event dispatcher

• To perform asynchronous system calls

• To fake asynchronous I/O operations

• To optimize network hardware

Which model requires the use of processes as helpers when the kernel is not multithreaded?

• Asymmetric Multi-Process Event-Driven Model (AMPED)

• Asymmetric Multi-Threaded Event-Driven Model (AMTED)

• Multiprocess and Multithreaded Model

• Single Process Event-Driven (SPED) Model

What is one benefit of using the AMPED model in the event-driven system?

• It resolves portability issues and fakes asynchronous I/O operations

• It provides a smaller memory footprint and faster synchronization

• It allows for better event routing on multi CPU systems

• It improves the performance of disk-bound workloads

Which web server model follows the AMPED model and uses asymmetric helper processes for blocking I/O operations?

• Flash Web Server

• Apache Web Server

• Zeus Web Server

• CS Web Server

What type of workload did the authors use in their experiments to evaluate the performance of the Flash web server?

• Real-world traces from Rice University web server

• Real-world traces from student-run websites

• Synthetic workload generator

• All of the above

What metric did the authors use to measure the performance of the web servers in their experiments?

• Bandwidth

• Execution time

• Throughput

• Connection rate

What is the impact of file size on the connection rate in the experimental results?

• Connection rate increases with file size

• Connection rate decreases with file size

• Connection rate remains constant regardless of file size

• Connection rate is not affected by file size

Which web server model performed the best in terms of bandwidth and connection rate in the CS trace workload?

• Flash Web Server

• SPED implementation

• Multithreaded/Multiprocess implementation

• Apache Web Server

What is an important factor to consider when designing experiments for web servers?

• Understanding the metrics and configuration space

• Varying multiple parameters at once

• Using unrealistic workload configurations

• Ignoring system resources