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CERN Accelerating science

General Talks

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2021-06-22
15:23
Search for long-lived particles decaying into two muons using data collected with high rate triggers at CMS / Masciovecchio, Mario (speaker) (Univ. of California San Diego (US))
A search for long-lived particles decaying into two muons is presented, using proton-proton collision data collected with the CMS experiment in 2017 and 2018 at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 101/fb. We achieve unprecedented sensitivity to otherwise inaccessible phase space at low dimuon mass and nonzero displacement from the interaction point thanks to the success of the CMS dedicated dimuon scouting (high rate) trigger effort [...]
2021 - 0:56:53. LHC Seminar External link: Event details In : Search for long-lived particles decaying into two muons using data collected with high rate triggers at CMS

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2021-06-21
12:03
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Programming for GPUs / vom Bruch, Dorothea (speaker) (CPPM/CNRS)
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
2021 - 1:03:50. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-21
10:06
Performant programming for GPUs / Campora, Daniel (speaker) (University of Maastricht)
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
2021 - 0:58:03. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-17
17:01
Scientific computing on heterogeneous architectures / vom Bruch, Dorothea (speaker) (CPPM/CNRS)
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
2021 - 1:04:15. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-17
16:37
Parallel and optimised scientific software - exercise introduction / Ponce, Sebastien (speaker) (CERN)
Optimisation of an existing, production grade large codebase
2021 - 0:06:01. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-17
16:24
Practical vectorization / Ponce, Sebastien (speaker) (CERN)
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
2021 - 1:01:46. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-16
16:07
Special evening talk: Future of the Universe and of Humanity / Puljak, Ivica (speaker) (University of Split)
2021 - 1:14:54. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-16
15:47
Optimizing existing large codebase / Ponce, Sebastien (speaker) (CERN)
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++
2021 - 1:03:26. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-16
15:43
Modern programming languages for HEP / Ponce, Sebastien (speaker) (CERN)
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
2021 - 1:03:33. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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2021-06-16
15:41
Writing parallel software / Piparo, Danilo (speaker) (CERN)
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
2021 - 1:00:33. Thematic CSC; Thematic CERN School of Computing - spring 2021 External links: Talk details; Event details In : Thematic CERN School of Computing - spring 2021

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