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RL-ARM User's Guide
RL-RTX Overview 
Product Description Product Specification Technical Data Timing Specifications Advantages 
Your First RTX Application 
Theory of Operation Timer Tick Interrupt System Task Manager Task Management Idle Task System Resources Scheduling Options Pre-emptive Scheduling Round-Robin Scheduling Cooperative Multitasking Priority Inversion Stack Management User Timers Interrupt Functions Configuring RTX Kernel Basic RTX Configuration Tasks Stack Size Stack Checking Run in Privileged Mode Hardware Timer Round-Robin Multitasking User Timers FIFO Queue Buffer Error Function Idle Task Advanced RTX Configuration HW Resources Required Configuration Macros Library Files Using RTX Kernel Writing Programs Include Files Defining Tasks Multiple Instances External References Using a Mailbox SWI Functions SVC Functions Debugging System Info Task Info Event Viewer Usage Hints ARM Version Cortex Version Create New RTX Application Function Reference Event Flag Management Routines Mailbox Management Routines Memory Allocation Routines Mutex Management Routines Semaphore Management Routines System Functions Task Management Routines Time Management Routines User Timer Management Routines 
RL-FlashFS 
RL-TCPnet RL-CAN RL-USB Example Programs Library Reference AppendixTiming Specifications
| Function | ARM7™/ARM9™ (cycles) | Cortex™-M (cycles) |
|---|---|---|
| Initialize system (os_sys_init), start task | 1721 | 1147 |
| Create task (no task switch) | 679 | 403 |
| Create task (switch task) | 787 | 461 |
| Delete task (os_tsk_delete) | 402 | 218 |
| Task switch (by os_tsk_delete_self) | 458 | 230 |
| Task switch (by os_tsk_pass) | 321 | 192 |
| Set event (no task switch) | 128 | 89 |
| Set event (switch task) | 363 | 215 |
| Send semaphore (no task switch) | 106 | 72 |
| Send semaphore (switch task) | 364 | 217 |
| Send message (no task switch) | 218 | 117 |
| Send message (switch task) | 404 | 241 |
| Get own task identifier (os_tsk_self) | 23 | 65 |
| Interrupt lockout | <160 | 0 |
Note
- The table for ARM7™/ARM9™ RTX Kernel library is measured on LPC2138 (ARM7), code execution from internal flash with zero-cycle latency.
- The table for Cortex™-M RTX Kernel library is measured on LPC1768 (Cortex-M3), code execution from internal flash with zero-cycle latency.
- The RTX Kernel for the test is configured for 10 tasks, 10 user timers and stack checking disabled.
- Interrupt lockout in ARM7™/ARM9™ includes the ISR prolog generated by the compiler.
- The RTX Kernel library for Cortex™-M3/M4 does not disable interrupts. Interrupt lockout for Cortex™-M0/M1 is <20 cycles.
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