Measuring Real-Time Performance Of An RTOS - Express Logic

Recommendations

Info

Implicitly Measured • Service entry design – Trap – Call • Uses unimplemented instruction trap to force interrupt • ISR examines parameters and transfers to appropriate <strong>RTOS</strong> service • Similar to debugger software-breakpoint technique • Locks out interrupts for a time • Uses processor branch instruction, no interrupts • Low overhead • Requires linking 8
Cooperative Context Switching • Threads run to completion and then exit • This test consists of 5 threads created at the same priority – Each thread runs to completion and then voluntarily releases control. – Threads run in a round-robin fashion. – Each thread increments its run counter and then relinquishes to the next thread Thread 0 Thread 1 Thread 2 Thread 3 Thread 4 9
Page 1 and 2: Express Logic, Inc. © 2006, Expres
Page 3 and 4: Most Important RTOS Capabilities
Page 5 and 6: Thread-Metric: An Open RTOS Benchma
Page 7: How Are Services Measured? • Lots
Page 11 and 12: Interrupt Handling • Must conside
Page 13 and 14: Message Processing • A Thread sen
Page 15 and 16: Memory Allocation • Applications
Page 17 and 18: Test Environment • ARM Versatile
Page 19 and 20: How To Get The Code • Download fr

Measuring Real-Time Performance Of An RTOS - Express Logic

Create successful ePaper yourself

Delete template?

Save as template?