FreeRTOS Support Archive
The 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.
This is a read only archive of threads posted to the FreeRTOS support forum.
The archive is updated every week, so will not always contain the very latest posts.
Use these archive pages to search previous posts. Use the Live FreeRTOS Forum
link to reply to a post, or start a new support thread.
[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [April 2009 Threads] Timing Details Of RTOs CallsPosted by Sachin Bhujbal on April 27, 2009 Dear All, I am using FreeRTOS in STR9 at 96MHz. Can anybody tell me the timing details of all ( or whatever available ) RTOs calls or guide me to derive it ? i.e. time of reading & sending one message from & to queue respectively( in tasks & in interrupt ). Time of getting semaphore if it is immediately available. Time of Stack switching, etc. I also want to calculation parameters for task stack so that I will vary much sure about my task design. I know that I can calculate Stack Size by adding sizes of all variables in that tasks & addition of sizes of local variables within the functions called from it. But is there anything to be considered i.e sizes of local variables of RTOs functions or anything more to consider while calculating Stact Size.
Thanks, Sachin D. Bhujbal
RE: Timing Details Of RTOs CallsPosted by jp_r on May 1, 2009 For the timing details, maybe hookup a scope and sprinkle pin high/low commands around your code (or within the freertos functions).
You can use this first function to check stack usage: http://www.freertos.org/index.html?http://www.freertos.org/uxTaskGetStackHighWaterMark.html
To catch overflows: http://www.freertos.org/index.html?http://www.freertos.org/Stacks-and-stack-overflow-checking.html
RE: Timing Details Of RTOs CallsPosted by Sachin Bhujbal on May 5, 2009 Thanks for Reply, I know the above links for stack overflow checking. But when we check Stack Sizes with function HighWaterMark.., etc, at that stage we must have completed design & implementation of our project. So if I have to modify the stack size of some tasks, then if may reflect my design, so I want to know it before its design & implementation. For Timings I will check it with pin toggling, etc. Bye the way thanks for the reply.
Sachin Bhujbal
Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.
|