├── README.txt
├── dataStructures.h
├── getters.c
├── getters.h
├── helper.c
├── helper.h
├── main.c
├── makefile
├── mllf
├── mllf_schedule.txt
├── schedule_analysis.txt
├── scheduler.c
├── scheduler.h
├── scheduler_helper.c
└── taskset.txt
-
navigate to the project directory and type command
make -
this generates executable named 'mllf'
-
feed input file as a paramenter while executing the output file
./mllf taskset.txt -
this generates two text files as described below:
-
required schedule is available in file
mllf_schedule.txt
-
parameters can be viewed in file
schedule_analysis.txt
Input file is organised as follows:
No of tasks
Arrival,WCET,period,deadline
(in order mentioned below)
- taskset read
- utilization calculated
- hyper-period calculated
- job-list created
- scheduling performed
- parameter calculations: Absolute Response Jitter, Relative Response Jitter
- hyper-period computation
- utilization computation
- scheduling
- scheduler not getting invoked when out-of-phase job get's released
-
instead of making a queue of ready jobs, we have tried to simulate the same using: ---- getNextEDFJob() ---- getNextArrival() functions in getters.c file.
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job's arrival is checked while on the run, instead of making a list of jobs before hand; and admitted accordingly.
scheduler.c
void mllfScheduler() : It schedules the taskset read and writes it to the mllf_schedule.txt.
It calculates number of preemptions and context switches to the schedule_analysis.txt.
scheduler_helper.c
task* initializeTaskAttributes() : ionitializes the tasks and makes a taskset
job* jobInitialization() : initializes parameters of the job that arrives in the system
void slackUpdation() : updates slack time of the ready jobs
arrivalsCheck(): it adds job that arrives at or before the current time
getters.c
int getRandomNumber() : It generates random number between given lower_bound and upper_bound. (between 50 to 100)
int getGCD() : It returns Greatest Common Divisor(GCD) of two numbers.
int getHyperperiod() : It returns Hyper-Period of the taskset read.
float getMinimumLaxity() : It returns minimum laxity/slack value of the job from the ready queue.
int getMinimumLaxity_procs() : It returns minimum laxity/slack value job index.
int getNextEDFJob(): It returns index of job having least deadline.
float getNextArrival() : It returns the next arrival time of the task i.e. when a new job arrives.
helper.c
void getTasksfromFile() : It reads taskset from the taskset.txt file.
It also initializes task as well as job.
static void getARJ() : It calculates and writes Absolute Response Jitter time in schedule_analysis.txt.
static void getRRJ() : It writes Relative Response Jitter time in schedule_analysis.txt.
void calculateTaskParameters() : It calls static void getARJ() and getRRJ().