UCL for Code in Research

Peter Schmidt
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The companion podcast for courses on programming from the Advanced Research Computing Centre of the University College of London, UK. 

  1. 7H AGO

    3/9 Research Software Engineering with Python (Comp233) - Introduction to Python

    Python is one of the most widely used programming languages in research and science. How did it come to that. And what makes Python special? It's something I discuss with my guest in this episode, Robin Wilson, who also takes us through some of the less favourable or more complex aspects of the language. Links http://www.rtwilson.com Robert Wilsonhttps://blog.rtwilson.com Robert's blog postshttps://www.python.orghttps://anaconda.org Anaconda Python distributionhttps://jupyter.org all things Jupyterhttps://ipython.org iPythonhttps://inference-review.com/article/the-origins-of-pythonhttps://en.wikipedia.org/wiki/Literate_programmingPython libraries for science https://numpy.org https://scipy.org https://pandas.pydata.orghttps://scikit-learn.org/stable/Don't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    25 min

  2. OCT 8

    2/9 Research Software Engineering with Python (COMP233) - Git Part 2

    In this episode we look into more essential Git commands, such as branching and merging. Branching and merging are key concepts that help you develop code or even text documents in a team. They help you maintain different versions of files and work on them independently. Another element of collaborative working is provided by GitHub: the pull request. Pull request are a great way to do code reviews, which avoids introducing bugs and also learn from each other. In my conversations Sam and Eirini talk about these key features and their experiences with it. Links: https://git-scm.com/ Git againhttps://martinfowler.com/articles/branching-patterns.html Martin Fowler's blog post on branching patternshttps://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests explains the mechanics of pull requests in more detailhttps://github-pages.ucl.ac.uk/rsd-engineeringcourse/ Lecture notesDon't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    26 min

  3. OCT 1

    1/9 Research Software Engineering with Python (COMP233) - Git Part 1

    Peter Schmidt - the host of this podcast - interviews Sam Harrison, an environmental modeller at the UK Centre for ecology and hydrology. Is it version control important for his research? what tool does he use? How he learn it? Links and transcript available in the show notes. About Sam https://www.ceh.ac.uk/staff/samuel-harrisonhttps://www.ceh.ac.uk/About Git https://git-scm.com/https://github.com/git/git/https://github.com/git/git/tree/v0.99 (almost) first version of Git from 2005https://github-pages.ucl.ac.uk/rsd-engineeringcourse/ Lecture notesDon't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    21 min

  4. MAR 30

    10/10 C++: Wrapping it up

    In this last episode of the companion podcast for the C++ course at UCL, I invited both Klaus Iglberger and Marc Hartung (Dive, Berlin) to go through some aspects of parallel computing. But also to look a little bit ahead of what's in store for C++ in future standards. And how the language may help you in your career. Links: https://www.youtube.com/watch?v=NReDubvNjRg&list=PLY_qIufNHc2-Dk9IVNtgoF4uhKRszjJPz Cpp Conference (Cpp Con) Back to basics YouTube 2023https://www.youtube.com/watch?v=VRGRTvfOxb4&list=PLY_qIufNHc2950NLOeUFuO0DsqjAZ6cG0 Cpp Conference (Cpp Con) Back to basics YouTube 2024https://cppcast.com/ A podcast dedicated to all things C++https://adspthepodcast.com/ ADSP (Algorithms + Data Structures = Programs) Podcasthttps://learning.oreilly.com/library/view/c-software-design/9781098113155/ Klaus Iglberger's book on "C++ Software Design"https://blogs.fau.de/hager/hpc-book HPC book with lots of material on parallel computing Georg Hager, Gerhard Wellein I'd like to thank UCL and the UCL Advanced Research Computing Centre for their support and creating this show. In particular David Perez-Suarez, Michael McLeod and Mashy Green. Don't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    39 min

  5. MAR 26

    9/10 - Distributed Memory and Parallel Computing

    Marc Hartung and I will discuss distributed memory in parallel computing in this episode, with tools like OpenMPI. We also discuss some of the hardware aspects around HPC systems and how shared and distributed memory computations differ. Links: https://www.open-mpi.org OpenMPI homepagehttps://docs.open-mpi.org/ the docs for OpenMPIhttps://www.mpi-forum.org The MPI Forum (who write the MPI standard)http://openshmem.org/site/ OpenSHMEM https://en.wikipedia.org/wiki/Distributed_memory summary page on distributed memoryhttps://en.wikipedia.org/wiki/InfiniBand InfiniBand network solution https://www.nextplatform.com/2022/01/31/crays-slingshot-interconnect-is-at-the-heart-of-hpes-hpc-and-ai-ambitions/ Slingshot network solution https://en.wikipedia.org/wiki/Partitioned_global_address_space https://www.techtarget.com/whatis/definition/von-Neumann-bottleneck the bottleneck named after John von Neumannhttps://en.wikipedia.org/wiki/Floating_point_operations_per_second overview of FLOPS (floating point operations per second)https://www.openmp.org/wp-content/uploads/HybridPP_Slides.pdf OpenMP and OpenMPI working together in a hybrid solutionhttps://blogs.fau.de/hager/hpc-book Georg Hager/Gerhard Wellein book on HPC for scientists and engineers Don't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    38 min

  6. MAR 19

    8/10 When things happen all ... in parallel

    Parallel programming is a huge, exciting and evolving field. Together with my guest Marc Hartung from Dive in Berlin, Germany, we try to cover some aspects of it: including OpenMP, how to synchronise data etc.  Links: https://en.cppreference.com/w/cpp/language/memory_model the C++ memory modelhttps://www.openmp.org OpenMP home pagehttps://www.openmp.org/resources/openmp-compilers-tools/ Compilers for OpenMPhttps://gcc.gnu.org/projects/gomp/ the GNU OpenMP compilerhttps://en.wikipedia.org/wiki/Amdahl%27s_law Amdahl's "law"https://dl.acm.org/doi/pdf/10.1145/1465482.1465560 the paper from Amdahlhttps://en.wikipedia.org/wiki/Threading_Building_Blocks TBBhttps://github.com/uxlfoundation/oneTBB GitHub link for TBBhttps://eigen.tuxfamily.org/dox/TopicMultiThreading.html Eigenhttps://help.rc.ufl.edu/doc/Memory:_Shared_vs_Distributed one of the links discussing shared and distributed memory in parallel computingDon't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    37 min

  7. MAR 12

    7/10 Oh please, make it faster...performance in C++

    How can we measure the performance (run-time, memory usage etc) of our C++ code? And what does performance mean, anyway. These and other questions are the topic of this episode - with my guest Klaus Iglberger, C++ engineer, tutor and mentor.  Memory https://en.wikipedia.org/wiki/Non-uniform_memory_access something about memory accesshttps://dl.acm.org/doi/10.1145/216585.216588 Ań article on 'Hitting the memory wall' how fast can memory access be?https://www.ibm.com/docs/en/xl-c-and-cpp-aix/13.1.3?topic=performance-managing-memory-efficiently-c-only what can we do to make memory usage more efficient Tools https://valgrind.org Valgrind profilerhttps://www.intel.com/content/www/us/en/developer/tools/oneapi/vtune-profiler.html vtune profilerhttps://ftp.gnu.org/old-gnu/Manuals/gprof-2.9.1/html_mono/gprof.html gprof profiler from GNUhttps://quick-bench.com Quick online Benchmarking toolhttps://godbolt.org see what your compiler actually doeshttps://github.com/google/googletest Google C++ test frameworkhttps://github.com/boost-ext/ut UT test frameworkhttps://github.com/google/benchmark Google benchmark toolhttps://github.com/catchorg/Catch2 catch2 frameworkhttps://learn.microsoft.com/en-us/visualstudio/profiling Profiling with Visual StudioMisc https://medium.com/swlh/reliable-performance-testing-in-c-1df7a3ba398 article on performance testinghttps://scholarworks.umt.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1375&context=tme Historical review of complexity evaluationshttps://web.mit.edu/16.070/www/lecture/big_o.pdf The Big O NotationDon't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    32 min

  8. MAR 5

    6/10 The code you're looking for is in ... the library

    Software libraries play a crucial role in software development, and C++ is no exception. Klaus and I walk through the different aspects of building, using and selecting libraries.  Links: https://cmake.org CMake toolhttps://en.wikipedia.org/wiki/Library_(computing) write up on software libraries with a bit of historyhttps://en.wikipedia.org/wiki/Executable_and_Linkable_Format the ELF Format for shared libs (executable and linkable format)https://gcc.gnu.org/onlinedocs/gcc-7.3.0/gcc/Link-Options.html Link options of the g++ compilerhttps://www.toptal.com/c-plus-plus/c-plus-plus-understanding-compilation An overview of how compilation workshttps://cplusplus.com/articles/Gw6AC542/ a write up on headers and includes - with a mention of header guardshttps://en.wikipedia.org/wiki/Z23_(computer) the Zuse Z23 computer I mentionedOh, and the title is inspired by a book from the Japanese author M Aoyama called 'What You're Looking For Is In The Library'. https://en.wikipedia.org/wiki/What_You_Are_Looking_For_Is_in_the_Library Don't be shy - say Hi This podcast is brought to you by the Advanced Research Computing Centre of the University College London, UK. Producer and Host: Peter Schmidt

    34 min
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About

The companion podcast for courses on programming from the Advanced Research Computing Centre of the University College of London, UK. 

Information

  • Creator
    Peter Schmidt
  • Years Active
    2024 - 2025
  • Episodes
    14
  • Rating
    Clean
  • Copyright
    © 2025 UCL for Code in Research
  • Show Website
    UCL for Code in Research