In computer engineering, a reduced instruction set computer (RISC) is a computer architecture designed to simplify the individual instructions given to the computer to accomplish tasks. Compared to the instructions given to a complex instruction set computer (CISC), a RISC computer might require more instructions in order to accomplish a task because the individual instructions are written in simpler code. The goal is to offset the need to process more instructions by increasing the speed of each instruction, in particular by implementing an instruction pipeline, which may be simpler to achieve given simpler instructions.
A supercomputer is a computer with a high level of performance as compared to a general-purpose computer. The performance of a supercomputer is commonly measured in floating-point operations per second (FLOPS) instead of million instructions per second (MIPS). Since 2017, there have existed supercomputers which can perform over 1017 FLOPS (a hundred quadrillion FLOPS, 100 petaFLOPS or 100 PFLOPS). For comparison, a desktop computer has performance in the range of hundreds of gigaFLOPS (1011) to tens of teraFLOPS (1013). Since November 2017, all of the world's fastest 500 supercomputers run on Linux-based operating systems. Additional research is being conducted in the United States, the European Union, Taiwan, Japan, and China to build faster, more powerful and technologically superior exascale supercomputers.
High-performance computing (HPC) uses supercomputers and computer clusters to solve advanced computation problems.
MareNostrum is the main supercomputer in the Barcelona Supercomputing Center. It is the most powerful supercomputer in Spain, one of thirteen supercomputers in the Spanish Supercomputing Network and one of the seven supercomputers of the European infrastructure PRACE.
The TOP500 project ranks and details the 500 most powerful non-distributed computer systems in the world. The project was started in 1993 and publishes an updated list of the supercomputers twice a year. The first of these updates always coincides with the International Supercomputing Conference in June, and the second is presented at the ACM/IEEE Supercomputing Conference in November. The project aims to provide a reliable basis for tracking and detecting trends in high-performance computing and bases rankings on HPL benchmarks, a portable implementation of the high-performance LINPACK benchmark written in Fortran for distributed-memory computers.
Arm is a British semiconductor and software design company based in Cambridge, England whose primary business is the design of ARM processors (CPUs). It also designs other chips, provides software development tools under the DS-5, RealView and Keil brands, and provides systems and platforms, system-on-a-chip (SoC) infrastructure and software. As a "holding" company, it also holds shares of other companies. Since 2016, it has been owned by Japanese conglomerate SoftBank Group.
Manycore processors are special kinds of multi-core processors designed for a high degree of parallel processing, containing numerous simpler, independent processor cores. Manycore processors are used extensively in embedded computers and high-performance computing.
Exascale computing refers to computing systems capable of calculating at least "1018 IEEE 754 Double Precision (64-bit) operations (multiplications and/or additions) per second (exaFLOPS)"; it is a measure of supercomputer performance.
Eurotech is a company dedicated to the research, development, production and marketing of miniature computers (NanoPCs) and high performance computers (HPCs).
Zero ASIC Corporation, formerly Adapteva, Inc., is a fabless semiconductor company focusing on low power many core microprocessor design. The company was the second company to announce a design with 1,000 specialized processing cores on a single integrated circuit.
Several centers for supercomputing exist across Europe, and distributed access to them is coordinated by European initiatives to facilitate high-performance computing. One such initiative, the HPC Europa project, fits within the Distributed European Infrastructure for Supercomputing Applications (DEISA), which was formed in 2002 as a consortium of eleven supercomputing centers from seven European countries. Operating within the CORDIS framework, HPC Europa aims to provide access to supercomputers across Europe.
Xeon Phi was a series of x86 manycore processors designed and made by Intel. It was intended for use in supercomputers, servers, and high-end workstations. Its architecture allowed use of standard programming languages and application programming interfaces (APIs) such as OpenMP.
T-Platforms is a Russian supercomputer company. The main competitor is RSC Group.
IBM Power microprocessors are designed and sold by IBM for servers and supercomputers. The name "POWER" was originally presented as an acronym for "Performance Optimization With Enhanced RISC". The Power line of microprocessors has been used in IBM's RS/6000, AS/400, pSeries, iSeries, System p, System i, and Power Systems lines of servers and supercomputers. They have also been used in data storage devices and workstations by IBM and by other server manufacturers like Bull and Hitachi.
The Hartree Centre is a high performance computing, data analytics and artificial intelligence (AI) research facility focused on industry-led challenges. It was formed in 2012 at Daresbury Laboratory on the Sci-Tech Daresbury science and innovation campus in Cheshire, UK. The Hartree Centre is part of the Science and Technology Facilities Council (STFC) which itself is part of United Kingdom Research and Innovation (UKRI).
The Sunway TaihuLight is a Chinese supercomputer which, as of November 2021, is ranked fourth in the TOP500 list, with a LINPACK benchmark rating of 93 petaflops. The name is translated as divine power, the light of Taihu Lake. This is nearly three times as fast as the previous Tianhe-2, which ran at 34 petaflops. As of June 2017, it is ranked as the 16th most energy-efficient supercomputer in the Green500, with an efficiency of 6.1 GFlops/watt. It was designed by the National Research Center of Parallel Computer Engineering & Technology (NRCPC) and is located at the National Supercomputing Center in Wuxi in the city of Wuxi, in Jiangsu province, China.
The European High-Performance Computing Joint Undertaking is a public-private partnership in High Performance Computing (HPC), enabling the pooling of European Union–level resources with the resources of participating EU Member States and participating associated states of the Horizon Europe and Digital Europe programmes, as well as private stakeholders. The Joint Undertaking has the twin stated aims of developing a pan-European supercomputing infrastructure, and supporting research and innovation activities. Located in Luxembourg City, Luxembourg, the Joint Undertaking started operating in November 2018 under the control of the European Commission and became autonomous in 2020.
The A64FX is a 64-bit ARM architecture microprocessor designed by Fujitsu. The processor is replacing the SPARC64 V as Fujitsu's processor for supercomputer applications. It powers the Fugaku supercomputer, ranked in the TOP500 as the fastest supercomputer in the world from June of 2020, until falling to second place behind Frontier in June of 2022.
Aurora is a planned supercomputer, originally contracted to be completed by 2018 but through a series of delays at the prime contractor, Intel Corporation, now planned to be completed in 2023. It was originally planned be the worlds’ fastest supercomputer with over 2 exaflops, however a series of delays have cast that into doubt. It is sponsored by the United States Department of Energy (DOE) and designed by Intel and Cray for the Argonne National Laboratory. It will have c. 2 exaFLOPS in computing power which is approximately a quintillion (260 or 1018) calculations per second and will have an expected cost of US$500 million. It will follow Frontier, which was the world's first exascale supercomputer in 2022 and the first half of 2023.
Performance portability refers to the ability of computer programs and applications to operate effectively across different platforms. Developers of performance portable applications seek to support multiple platforms without impeding performance, and ideally while minimizing platform-specific code.
