## 703078 PS Parallel Programming - Introduction & Administrative Stuff Maximilian Ebner, Philipp Gschwandtner, Samuel Plangger --- ## Instructor information - Samuel Plangger (Group 1, 08:00-08:45) - samuel.plangger@student.uibk.ac.at - <img src="https://upload.wikimedia.org/wikipedia/commons/3/31/Discord-icon-svgrepo-com.svg" style="vertical-align:middle; height:30px"> samuelplangger - Philipp Gschwandtner (Group 2, 09:00-09:45) - philipp.gschwandtner@uibk.ac.at - <img src="https://upload.wikimedia.org/wikipedia/commons/3/31/Discord-icon-svgrepo-com.svg" style="vertical-align:middle; height:30px"> philgs - Philipp Gschwandtner (Group 3, 10:00-10:45) - philipp.gschwandtner@uibk.ac.at - <img src="https://upload.wikimedia.org/wikipedia/commons/3/31/Discord-icon-svgrepo-com.svg" style="vertical-align:middle; height:30px"> philgs - Maximilian Ebner (Group 4, 11:00-11:45) - maximilian.ebner@student.uibk.ac.at - <img src="https://upload.wikimedia.org/wikipedia/commons/3/31/Discord-icon-svgrepo-com.svg" style="vertical-align:middle; height:30px"> _skimax_ - Maximilian Ebner (Group 5, 12:00-12:45) - maximilian.ebner@student.uibk.ac.at - <img src="https://upload.wikimedia.org/wikipedia/commons/3/31/Discord-icon-svgrepo-com.svg" style="vertical-align:middle; height:30px"> _skimax_ --- ## More organizational stuff <div class="container"> <div class="col"> - Prerequisites - Interest in parallel programming - Programming in C or C++ - Language - Group 2: English - Groups 1, 3-5: German, unless there are non-German speakers? </div> <div class="col"> - Content - General concepts of parallel programming - Concepts apply to many parallel programming models - As an example, we will mainly discuss OpenMP </div> </div> --- ## Discord server - Discord server for any discussions outside the PS - https://discord.gg/7nj98zzeM6 --- ## Grading - Weekly assignments, published on OLAT - Link to GitHub - 3 points per week - Teamwork is permitted and encouraged - 3 people max. per team - <u>Every</u> team member must be able to present and discuss solution - Solutions must be handed in until Mon 17:00! - Solutions of assignments on the LCC3 cluster <u>must work</u> on LCC3 - Copying solutions (e.g. off the Internet) is acceptable <u>if cited properly and understood</u> - Grade is 50% solutions, 50% presentations/discussion - <u>both must be above 50%!</u> - Presence mandatory! Must not miss more than 2 weeks (except for medical reasons, etc.) --- ## Literature - www.internet.com - https://www.openmp.org/resources (incl. video tutorials) - stackoverflow - Google - ... - Old school: printed books - Let us know and we'll look up some references --- ## Hints (not only) for this course <div class="container"> <div class="col"> - choose a suitable source code editor / IDE and choose it wisely! - get acquainted with your toolchain debuggers, version control (git), etc. - use common sense and sanity checks! </div> <div class="col"> <img src="img/sandbox.png" height="100%"> </div> --- ## Clusters and supercomputers <div class="container"> <div class="col"> Look like: <img src="img/supercomputer2.png" height="80%"> </div> <div class="col"> Feel like: <img src="img/supercomputer3.png" height="80%"> </div> </div> --- ## Get user credentials, log in and change your password! - `ssh cbXXXXXX@login.lcc3.uibk.ac.at` - Change password with `passwd` - You are responsible for your account! - don't use these credentials for anything other than this course - coin mining isn't worth it anyways --- ## Submission systems <div class="container"> <div class="col"> - Responsible for resource management and job orchestration - used to submit or cancel "jobs", query their status, get information about cluster, ... - Very popular: SLURM - modern, complex but very capable - de-facto standard on most systems these days </div> <div class="col"> <img src="img/slurm.png" height="100%"> </div> </div> --- ## Jobs: submission, deletion, status <div class="container"> <div class="col"> - `sbatch name_of_script` - allocates resources - sets up environment - executes application - frees allocation - `scancel job_id_list` - terminates application - frees up resources - `squ (squeue -U $USER)` - queries for job status - squeue for all users </div> <div class="col"> ```bash [cb761011@login.lcc3~]$ sbatch job.sh Submitted batch job 184 [cb761011@login.lcc3~]$ scancel 184 [cb761011@login.lcc3~]$ sbatch job.sh Submitted batch job 185 [cb761011@login.lcc3~]$ squ JOBID PRIORITY PARTITION NAME USER STATE NODES CPUS TIME_LIMIT NODELIST(REASON) 185 504 lvatest cb761011 RUNNING 1 8 30:00 n002 ``` </div> </div> --- ## Questions?