This is a command line utility to do some of the more tedious calculations needed for analysing real time systems
The tasks_example file provides a template to use for supplying task sets. The columns must remain in that order.
However, the deadline and priority column are optional. If no deadline is given it is assumed that the task set has implicit deadlines (D=T).
If no priority is given then deadline monotonic priority ordering is used (for implicit tasks this is the same as rate monotonic priority ordering).
Priorities must be integers from 1 upwards where 1 is the lowest priority. If a priority of 0 is provided to any task then the program will perform
deadline monotonic priority ordering to assign priorities (note omitting all priorities will also do this).
To use this you must supply a CSV file (see CSV File section)containing the tasks you want analysed. If deadlines are implicit you need not put data there but the column must be present.
The flags on this are a bit weird. The -u option or --utilisation must go at the end since it has an optional parameter.
This means it's a good idea to do cr -- <INPUT> [FLAGS][OPTIONS].
To see all options simply run cr -- -h.
To see how the program has interpreted your input you can pass -d or --debug
$ cr -- tasks_example -u
Utilisation test fails: 0.862 >= 0.757
$ cr -- tasks_example -u=1
Utilisation test passes: 0.862 <= 1.000Currently the features implemented are:
- Response time analysis (not including jitter or any more advanced stuff)
- L&L utilisation test (including being able to give the number of families)