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representation overview Providing lecture feedback Fast feedback hotline Staff-Student Consultative Forum Graduate Students' Forum ➥ Breaking the silence ➥ Student administration offices Job vacancies ➥ Intranet Multicore Semantics and Programming Department of Computer Science and Technology Current students Course material 2020/21 MPhil ACS Advanced Graphics and Image Processing Advanced Operating Systems Advanced Topics in Computer Architecture Advanced Topics in Computer Systems Advanced Topics in Mobile Systems and Mobile Data Machine Learning Advanced topics in machine learning or natural language processing Affective Computing Algebraic Path Problems Automated Reasoning Category Theory Computer Security: Principles and Foundations Computer Vision Cybercrime Data Science: principles and practice Digital Signal Processing Distributed Ledger Technologies: Foundations and Applications Hardware Security Practicals Interaction with machine learning Interactive Formal Verification Introduction to Natural Language Syntax and Parsing Large-scale data processing and optimisation Machine Learning and the Physical World Machine Learning for Language Processing Mobile Robot Systems Multicore Semantics and Programming Network Architectures Overview of Natural Language Processing Principles of Machine Learning Systems Probabilistic Machine Learning Research Skills Programme Technology, law and society Part IA Part IB CST 75% Part IB CST 50% Part II CST 75% Part II CST 50% Part III Principal lecturer: Peter Sewell Dr Timothy Harris Students: MPhil ACS, Part III Term: Michaelmas term Course code: L304 Prerequisites: Some familiarity with discrete mathematics (sets, partial orders, etc.) and with sequential Java programming will be assumed. Experience with operational semantics and with some concurrent programming would be helpful. Hours: 16 Class limit: 20 This module can accommodate up to 20 students consisting of both Part II students and MPhil / Part III Students Aims In recent years multiprocessors have become ubiquitous, but building reliable concurrent systems with good performance remains very challenging. The aim of this module is to introduce some of the theory and the practice of concurrent programming, from hardware memory models and the design of high-level programming languages to the correctness and performance properties of concurrent algorithms. Lectures Part 1: Introduction and relaxed-memory concurrency [Professor P. Sewell] Introduction. Sequential consistency, atomicity, basic concurrent problems. [1 block] Concurrency on real multiprocessors: the relaxed memory model(s) for x86, ARM, and IBM Power, and theoretical tools for reasoning about x86-TSO programs. [2 blocks] High-level languages. An introduction to C/C++11 and Java shared-memory concurrency. [1 block] Part 2: Concurrent algorithms [Dr T. Harris] Concurrent programming. Simple algorithms (readers/writers, stacks, queues) and correctness criteria (linearisability and progress properties). Advanced synchronisation patterns (e.g. some of the following: optimistic and lazy list algorithms, hash tables, double-checked locking, RCU, hazard pointers), with discussion of performance and on the interaction between algorithm design and the underlying relaxed memory models. [3 blocks] Research topics, likely to include one hour on transactional memory and one guest lecture. [1 block] Objectives By the end of the course students should: have a good understanding of the semantics of concurrent programs, both at the multprocessor level and the C/Java programming language level; have a good understanding of some key concurrent algorithms, with practical experience. Recommended reading Herlihy, M. and Shavit, N. (2008). The art of multiprocessor programming. Morgan Kaufmann. Coursework Coursework will consist of assessed exercises. Practical work Part 2 of the course will include a practical exercise sheet. The practical exercises involve building concurrent data structures and measuring their performance. The work can be completed in C, Java, or similar languages. Assessment Assignment 1, for 50% of the overall grade. Written coursework comprising a series of questions on the design of mutual exclusion locks and shared-memory data structures. Assignment 2, for 50% of the overall grade. Written coursework comprising a series of questions on hardware and software relaxed-memory concurrency semantics. Further Information Due to COVID-19, the method of teaching for this module will be adjusted to cater for physical distancing and students who are working remotely. We will confirm precisely how the module will be taught closer to the start of term. Current Cambridge undergraduate students who are continuing onto Part III or the MPhil in Advanced Computer Science may only take this module if they did NOT take it as a Unit of Assessment in Part II. This module is shared with the Part II Computer Science Tripos course Multicore Semantics and Programming. Assessment will be adjusted for the two groups of students to be at an appropriate level for whichever course the student is enrolled on. Further information about assessment and practicals will follow at the first lecture. Multicore Semantics and Programming Related links Course materials Assessment Contact us William Gates Building JJ Thomson Avenue Cambridge. 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