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FreeRTOS Support ArchiveThe FreeRTOS support forum is used to obtain active support directly from Real Time Engineers Ltd. In return for using our top quality software and services for free, we request you play fair and do your bit to help others too! Sign up to receive notifications of new support topics then help where you can.
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Tracking ISR runtimePosted by Preet Kang on February 26, 2010 Richard, Is it possible to modify saveContext and restoreContext to make a call to traceContextSwitchedOut and traceContextSwitchedIn to track OS and ISR overhead? Currently, what is happening is that if you use a lot of Interrupts, the # ticks account towards unknown tasks or Idle time, when it shouldn't. On a different note, what is the reasoning behind some function calls to start with v, others start with x, and some start with ux ? Thanks. Preet RE: Tracking ISR runtimePosted by MEdwards on February 26, 2010 “s it possible to modify saveContext and restoreContext to make a call to traceContextSwitchedOut and traceContextSwitchedIn to track OS and ISR overhead? Currently, what is happening is that if you use a lot of Interrupts, the # ticks account towards unknown tasks or Idle time, when it shouldn't.” It is easy to put whatever trace you like inside the ISR once the context is saved (if a context is saved). Doing it before the context is saved, so the save time is timed, is much more difficult and port dependent. “On a different note, what is the reasoning behind some function calls to start with v, others start with x, and some start with ux ?” Look at the very end of this page http://www.freertos.org/a00017.html#NamingConventions RE: Tracking ISR runtimePosted by Preet Kang on February 26, 2010 Thanks for the great reply Edward!
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NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
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