Name: Thematic CERN School of Computing 2023
Start: 2023-06-11T11:00:00+02:00
End: 2023-06-17T09:00:00+02:00
Location: MedILS, Split, Croatia

Thematic CERN School of Computing 2023

from Sunday, June 11, 2023 (11:00 AM) to Saturday, June 17, 2023 (9:00 AM)

Sunday, June 11, 2023

11:00 AM Registration
Registration
11:00 AM - 12:00 PM

12:20 PM Lunch
Lunch
12:20 PM - 1:30 PM

1:30 PM

1:30 PM - 4:00 PM

4:00 PM Welcome and introduction
Welcome and introduction
4:00 PM - 4:20 PM

4:20 PM Self presentations
Self presentations
4:20 PM - 5:00 PM
One minute-one slide self presentations

5:15 PM Visit of Split old town
Visit of Split old town
5:15 PM - 7:15 PM

7:30 PM Outside Welcome Dinner
Outside Welcome Dinner
7:30 PM - 10:00 PM
Monday, June 12, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM

8:45 AM Opening Session
Opening Session
8:45 AM - 9:30 AM

9:30 AM Self-presentation: 1 minute per person
Self-presentation: 1 minute per person
9:30 AM - 10:00 AM

10:00 AM Coffee break
Coffee break
10:00 AM - 10:15 AM
10:15 AM Preparing for the HL-LHC computational challenge - Danilo Piparo (CERN)
Preparing for the HL-LHC computational challenge
- Danilo Piparo (CERN)
10:15 AM - 11:15 AM
In this talk we will introduce some basic concepts related to HEP data processing and analysis workflows, seeing them in action in the context of LHC experiments. We’ll also talk about the evolution of the LHC accelerator and experiments. We’ll characterise at a high level what are the consequences of those upgrades for the HEP data processing software, in particular in the context of an evolving hardware and computing infrastructure.
11:15 AM Introduction to efficient computing - Andrzej Nowak
Introduction to efficient computing
- Andrzej Nowak
11:15 AM - 12:15 PM
Technologies and Platforms - lecture 1 - The evolution of computing hardware and what it means in practice - The seven dimensions of performance - Controlling and benchmarking your computer and software - Software that scales with the hardware - Advanced performance tuning in hardware
12:20 PM Lunch
Lunch
12:20 PM - 1:00 PM

1:00 PM Study time and/or daily sports
Study time and/or daily sports
1:00 PM - 2:00 PM

2:00 PM Self-presentation: 1 minute per person
Self-presentation: 1 minute per person
2:00 PM - 2:20 PM
2:20 PM Hardware evolution and heterogeneity - Andrzej Nowak
Hardware evolution and heterogeneity
- Andrzej Nowak
2:20 PM - 3:20 PM
Technologies and Platforms - lecture 2 - Accelerators, co-processors, heterogeneity - Memory architectures, hardware caching and NUMA - Compute devices: CPU, GPU, FPGA, ASIC etc. - The role of compilers
3:20 PM Coffee break
Coffee break
3:20 PM - 3:45 PM
3:45 PM Technologies and Platforms - exercise - Andrzej Nowak
Technologies and Platforms - exercise
- Andrzej Nowak
3:45 PM - 5:45 PM
5:45 PM Data-oriented design - Andrzej Nowak
Data-oriented design
- Andrzej Nowak
5:45 PM - 6:45 PM
Technologies and Platforms - lecture 3 - Hardware vectorization in detail – theory vs. practice - Software design for vectorization and smooth data flow - How can compilers and other tools help?
7:15 PM Dinner at MEDILS
Dinner at MEDILS
7:15 PM - 8:15 PM
Tuesday, June 13, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM
8:45 AM Writing parallel software - Sebastien Ponce (CERN)
Writing parallel software
- Sebastien Ponce (CERN)
8:45 AM - 9:45 AM
Parallel and Optimised Scientific Software - lecture 1 - Amdahl's and Gustafson's laws - Asynchronous execution - Finding concurrency, task vs. data parallelism - Using threading in C++ and Python, comparison with multi-process - Resource protection and thread safety - Locks, thread local storage, atomic operations
9:45 AM Announcements
Announcements
9:45 AM - 10:00 AM

10:00 AM Coffee break
Coffee break
10:00 AM - 10:15 AM
10:15 AM Modern programming languages for HEP - Sebastien Ponce (CERN)
Modern programming languages for HEP
- Sebastien Ponce (CERN)
10:15 AM - 11:15 AM
Parallel and Optimised Scientific Software - lecture 2 - Why Python and C++ ? - Recent evolutions: C++ 11/14/17 - Modern features of C++ related to performance - Templating versus inheritance, pros and cons of virtual inheritance - Python 3, and switching from Python 2
11:15 AM Technologies and Platforms - exercise - Andrzej Nowak
Technologies and Platforms - exercise
- Andrzej Nowak
11:15 AM - 12:15 PM
12:20 PM Lunch
Lunch
12:20 PM - 1:00 PM

1:00 PM Study time and/or daily sports
Study time and/or daily sports
1:00 PM - 2:00 PM
2:00 PM Technologies and Platforms - exercise debriefing - Andrzej Nowak
Technologies and Platforms - exercise debriefing
- Andrzej Nowak
2:00 PM - 2:20 PM
2:20 PM Optimizing existing large codebase - Sebastien Ponce (CERN)
Optimizing existing large codebase
- Sebastien Ponce (CERN)
2:20 PM - 3:20 PM
Parallel and Optimised Scientific Software - lecture 3 - Measuring performance, tools and key indicators - Improving memory handling - The nightmare of thread safety - Code modernization and low level optimizations - Data structures for efficient computation in modern C++
3:20 PM Coffee break
Coffee break
3:20 PM - 3:45 PM
3:45 PM Optimizing existing large codebase - exercise - Sebastien Ponce (CERN)
Optimizing existing large codebase - exercise
- Sebastien Ponce (CERN)
3:45 PM - 6:45 PM
Optimisation of an existing, production grade large codebase
7:15 PM Dinner at MEDILS
Dinner at MEDILS
7:15 PM - 8:15 PM
Wednesday, June 14, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM
8:45 AM Scientific computing on heterogeneous architectures - Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
Scientific computing on heterogeneous architectures
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
8:45 AM - 9:45 AM
Programming for Heterogeneous Architectures - lecture 1 - Introduction to heterogeneous architectures and the performance challenge - From general to specialized: Hardware accelerators and applications - Type of workloads ideal for different accelerators - Trade-offs between multi-core and many-core architectures - Implications of heterogeneous hardware on the design and architecture of scientific software - Embarrassingly parallel scientific applications in HPC and CERN
9:45 AM Announcements
Announcements
9:45 AM - 10:00 AM

10:00 AM Coffee break
Coffee break
10:00 AM - 10:15 AM

10:15 AM Student lightning talks
Student lightning talks
10:15 AM - 11:15 AM
11:15 AM Practical vectorization - Sebastien Ponce (CERN)
Practical vectorization
- Sebastien Ponce (CERN)
11:15 AM - 12:15 PM
Parallel and Optimised Scientific Software - lecture 4 - Measuring vectorization level - What to expect from vectorization - Preparing code for vectorization - Vectorizing techniques in C++: intrinsics, libraries, autovectorization
12:20 PM Lunch
Lunch
12:20 PM - 1:00 PM

1:00 PM School photo
School photo
1:00 PM - 1:05 PM

1:30 PM Outdoor excursion
Outdoor excursion
1:30 PM - 6:15 PM

7:00 PM Excursion dinner
Excursion dinner
7:00 PM - 8:30 PM
Thursday, June 15, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM
8:45 AM Programming for GPUs - Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
Programming for GPUs
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
8:45 AM - 9:45 AM
Programming for Heterogeneous Architectures - lecture 2 - From SIMD to SPMD, a programming model transition - Thread and memory organization - Basic building blocks of a GPU program - Control flow, synchronization, atomics
9:45 AM Announcements
Announcements
9:45 AM - 10:00 AM

10:00 AM Coffee break
Coffee break
10:00 AM - 10:15 AM
10:15 AM Performant programming for GPUs - Daniel Campora (University of Maastricht)
Performant programming for GPUs
- Daniel Campora (University of Maastricht)
10:15 AM - 11:15 AM
Programming for Heterogeneous Architectures - lecture 3 - Data locality, coalesced memory accesses, tiled data processing - GPU streams, pipelined memory transfers - Under the hood: branchless, warps, masked execution - Debugging and profiling a GPU application
11:15 AM Practical vectorization - exercise - Sebastien Ponce (CERN)
Practical vectorization - exercise
- Sebastien Ponce (CERN)
11:15 AM - 12:15 PM
12:20 PM Lunch
Lunch
12:20 PM - 1:00 PM

1:00 PM Study time and/or daily sports
Study time and/or daily sports
1:00 PM - 2:00 PM
2:00 PM Optimisation + vectorization - exercise debriefing - Sebastien Ponce (CERN)
Optimisation + vectorization - exercise debriefing
- Sebastien Ponce (CERN)
2:00 PM - 2:40 PM
2:40 PM Design patterns and best practices - Daniel Campora (University of Maastricht)
Design patterns and best practices
- Daniel Campora (University of Maastricht)
2:40 PM - 3:40 PM
Programming for Heterogeneous Architectures - lecture 4 - Good practices: single precision, floating point rounding, avoid register spilling, prefer single source - Other standards: SYCL, HIP, OpenCL - Middleware libraries and cross-architecture compatibility - Reusable parallel design patterns with real-life applications
3:40 PM Coffee break
Coffee break
3:40 PM - 4:10 PM
4:10 PM Programming for heterogeneous architectures - exercise - Daniel Campora (Nikhef National institute for subatomic physics (NL)) Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
Programming for heterogeneous architectures - exercise
- Daniel Campora (Nikhef National institute for subatomic physics (NL))
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
4:10 PM - 6:45 PM
7:15 PM Dinner at MEDILS
Dinner at MEDILS
7:15 PM - 8:15 PM
Friday, June 16, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM
8:45 AM Programming for heterogeneous architectures - exercise - Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France) Daniel Campora (University of Maastricht)
Programming for heterogeneous architectures - exercise
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
- Daniel Campora (University of Maastricht)
8:45 AM - 10:00 AM
10:00 AM Coffee break
Coffee break
10:00 AM - 10:15 AM
10:15 AM Programming for heterogeneous architectures - exercise - Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France) Daniel Campora (University of Maastricht)
Programming for heterogeneous architectures - exercise
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
- Daniel Campora (University of Maastricht)
10:15 AM - 11:30 AM
11:30 AM Announcements
Announcements
11:30 AM - 11:45 AM
11:45 AM Programming for heterogeneous architectures - exercise debriefing - Daniel Hugo Campora Perez (Nikhef National institute for subatomic physics (NL)) Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
Programming for heterogeneous architectures - exercise debriefing
- Daniel Hugo Campora Perez (Nikhef National institute for subatomic physics (NL))
- Dorothea Vom Bruch (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
11:45 AM - 12:15 PM
12:20 PM Lunch
Lunch
12:20 PM - 1:00 PM

1:00 PM Study time and/or daily sports
Study time and/or daily sports
1:00 PM - 2:20 PM
2:20 PM Summary and future technologies overview - Andrzej Nowak
Summary and future technologies overview
- Andrzej Nowak
2:20 PM - 3:20 PM
Technologies and Platforms - lecture 4 - Teaching program summary and wrap-up - Next-generation memory technologies and interconnect - Future computing evolution
3:20 PM Coffee break
Coffee break
3:20 PM - 3:45 PM

3:45 PM Exam
Exam
3:45 PM - 4:30 PM

4:30 PM Free time
Free time
4:30 PM - 6:00 PM

6:00 PM Closing Session
Closing Session
6:00 PM - 7:15 PM

7:30 PM Closing dinner
Closing dinner
7:30 PM - 9:30 PM
Saturday, June 17, 2023

8:00 AM Breakfast
Breakfast
8:00 AM - 8:30 AM

8:30 AM Departure - bus leaves at 8:30
Departure - bus leaves at 8:30
8:30 AM - 9:00 AM