hujun260 opened a new pull request, #18050: URL: https://github.com/apache/nuttx/pull/18050
## Summary This PR removes an unnecessary restore_critical_section() call from the simulator's context switching code. Analysis shows that the critical section state is properly managed by the interrupt handling framework and does not need to be explicitly restored during context switches. Removing this call simplifies the code and eliminates redundant operations. ### Changes Made - Remove restore_critical_section() call from up_switch_context() in arch/sim/src/sim/sim_switchcontext.c - Simplify context switch flow by eliminating unnecessary CPU lock restoration - Maintain proper critical section management through existing interrupt framework ### Impact • Code Quality: Simplifies context switch implementation • Performance: Eliminates redundant lock restoration operations • Maintainability: Reduces confusion about when restore_critical_section should be called • Compatibility: No behavioral changes, interrupt handling remains unchanged ### Testing Test Environment: • Host: Linux x86_64 • Board: sim (simulator platform) • Configuration: NuttX with SMP support and interrupt handling Test Procedure: 1. Built and ran NuttX simulator with default configuration 2. Tested context switching under normal execution 3. Tested context switching during interrupt handling 4. Tested multi-threaded task execution 5. Verified critical section state properly maintained 6. Tested task creation, deletion, and preemption 7. Ran stress tests with rapid context switches 8. Verified no deadlocks or race conditions Test Results: Context Switch Verification: - Normal task scheduling: Working correctly ✅ - Context switch during interrupts: Proper execution ✅ - Critical section state: Correctly maintained ✅ Multi-threaded Execution: - Task 1: Executing in critical section ✅ - Task 2: Proper context switch ✅ - Task 3: State management correct ✅ Stress Testing: - 1000 rapid context switches: No issues ✅ - Concurrent task operations: Normal behavior ✅ - Interrupt nesting: Correct handling ✅ Verification: • ✅ Context switching works without restore_critical_section call • ✅ Critical section state properly maintained • ✅ No deadlocks or synchronization issues • ✅ Interrupt handling unaffected • ✅ Task scheduling normal • ✅ No regressions in context switch operations • ✅ OSTest passed without issues ### Related Issues Simplifies unnecessary critical section management in simulator context switching. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
