Category Archives: Uncategorized

OpenSHMEM 1.4 for Epiphany

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OpenSHMEM 1.4 for Epiphany is available now as open source software on GitHub [0]. Compared to the previous announcement [1], OpenSHMEM 1.4 provides new functionality for Epiphany including, but not limited to: Adding shmem_sync_all and shmem_sync to provide PE synchronization without completing pending communication operations Adding shmem_test function, which tests whether a variable on the local PE has changed Adding shmem_calloc…

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OpenSHMEM for Epiphany

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The Epiphany coprocessor has 16 CPU cores, but they are configured differently than the 16 cores you might find in an Intel Xeon processor.  The Xeon processor is configured as a Symmetric Multiprocessor (SMP) [0] where all cores have shared access to a single main memory. Programming models like OpenMP and OpenCL are more suitable for SMP architectures.  In contrast,…

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A million core RISC CPU

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At the recent HiPEAC conference in Stockholm, Andreas Olofsson presented a path to the world’s first million core RISC microprocessor. Slides (PDF) —- Andreas Olofsson, “How to build a million core processor”, MULTIPROG: 2017 International Workshop on Programmability and Architectures for Heterogeneous Multicores  

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An open source 1024-core Epiphany Simulator

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A couple of years ago, Ola Jeppsson started working on a 1024-core simulator as part of his Master’s Thesis at Chalmer’s University in Sweden. (advisor, Sally McKee). He picked up the project again in 2016 as part of the validation process of the 1024-core Epiphany-V. Debugging with the simulator is an order of magnitude easier than with hardware, so you should…

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Parabuntu 2016.11 Release

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Thanks to another heroic integration effort from Ola Jeppsson, we now have a much improved Parallella Linux Distribution based on Ubuntu 15.04. (Note the name change from “pubuntu” to “parabuntu”) Here’s a selection of some of the pre-installed features: HDMI improvements (Thanks to Peter Saunderson and Ola Jeppsson) GDB Epiphany multicore support (Thanks to Pedro Alvez) EPYTHON parallel programming framework…

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Epiphany-V: A 1024-core 64-bit RISC processor

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I am happy to report that we have successfully taped out a 1024-core Epiphany-V RISC processor chip at 16nm.  The chip has 4.5 Billion transistors, which is 36% more transistors than Apple’s latest 4 core A10 processor at roughly the same die size. Compared to leading HPC processors, the chip demonstrates an 80x advantage in processor density and a 3.6x advantage in memory…

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200 chip definitions everyone should know

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Given how important chips are to modern society EVERYONE should understand and appreciate how they are made.  Every field has its own set of terms, jargon, and acronyms (engineers love acronyms!). As you would expect, chip design is no different. If you are new to chip design, it might take you a few days to read through the Wikipedia entries for each one of…

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