Downloading the HLS module

This page is still under development, and this section in particular still has to be written.

If you are impatient, just install the patched kernel, reboot the system, and insert the HLS module by doing

``insmod hls_module.o''

If you did not compile with the ``INT_SCHED'' option enabled, you also have to do

``insmod hls_sched_rr.o; insmod hls_sched_res.o; insmod hls_sched_ps.o''

If you enabled the ``CREATE'' option, a basic scheduling hierarchy is created, and a Round Robin scheduler is set as a default scheduler. Moreover, since the module insertion all the tasks are scheduled using the default scheduler (the HLS builtin round-robin scheduler).

If you did not enabled the ``CREATE'' option, you have to explicitly create your HLS schedulers hierarchy, by using the procfs interface.

``cat /proc/HLS/default'' shows the default scheduler's instance;
``cat /proc/HLS/schedulers'' shows a list of all the loaded schedulers;
``cat /proc/HLS/instances'' shows a list of all the schedulers' instances, showing the father of each scheduler. This permits to reconstruct the scheduling hierarchy;
``cat /proc/HLS/tasks'' shows a list of all the tasks scheduled by HLS schedulers
``echo "instance_name sched_name father_instance_name sched_params" > /proc/HLS/instances'' creates a new scheduler's instance. You have to be root.

More precise instructions will be provided in the future together with some example scripts.

You can change the scheduler for a task using the sched_setscheduler() call; have a look at ``tests/schedtest.c'' for more details.

If you want to try the simulator, go into the simulator directory and type ``make''. Then, ``./simulator'' will run a simple simulation (the output will be written in ``sim_output.txt''. Unfortunately, if you want to change the hierarchy or the workload you will have to edit ``sim.c''. We are currently working on this...

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