Ability to execute code on the same machine

For performance-related course (execution time of sorting algorithms, number of cycles to execute a loop, number of cache misses in a code, ...), we'd like students to get the same "numbers". This also allows a scoreboard, to create a competition between the students.

**Potential solutions**
A few solutions are:
* Use a dedicated backend for an exercise.
* Force the use of a similar backend for the jobs of the same exercise.
Both solutions would actually need the backend to have a per-cpu (at least) exclusive mode. Maybe memory could be reserved too. I don't know if this is already possible.

**Alternatives**
* Executing scripts through ssh on one of my own servers?
* Use a simulator like GEM5, but it is complex in certain scenarios and the simulator does not support some novel CPU instructions.