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OpenRISC is a project to develop a series of open-source hardware based central processing units (CPUs) on established reduced instruction set computer (RISC) principles. It includes an instruction set architecture (ISA) using an open-source license. It is the original flagship project of the OpenCores community.
RISC-V [b] (pronounced "risk-five" [2]: 1 ) is an open standard instruction set architecture (ISA) based on established reduced instruction set computer (RISC) principles. . The project began in 2010 at the University of California, Berkeley, transferred to the RISC-V Foundation in 2015, and on to RISC-V International, a Swiss non-profit entity, in November 20
Open source, multithreading, multi-core, 4 threads per core, scalar, in-order, integrated memory controller, 1 FPU UltraSPARC T2: 2007 8 Open source, multithreading, multi-core, 8 threads per core SPARC T3: 2010 8 Multithreading, multi-core, 8 threads per core, SMP, 16 cores per chip, 2 MB L3 cache, in-order, hardware random number generator
time (Unix) - can be used to determine the run time of a program, separately counting user time vs. system time, and CPU time vs. clock time. [1] timem (Unix) - can be used to determine the wall-clock time, CPU time, and CPU utilization similar to time (Unix) but supports numerous extensions.
The OpenRISC 1200 (OR1200) is an implementation of the open source OpenRISC 1000 RISC architecture. [1] [better source needed] A synthesizable CPU core, it was for many years maintained by developers at OpenCores.org, although, since 2015, that activity has now been taken over by the Free and Open Source Silicon Foundation at the librecores.org ...
Core Decode width Execution ports Pipeline depth Out-of-order execution FPU Pipelined VFP FPU registers NEON (SIMD) big.LITTLE role Virtualization [2] Process technology L0 cache L1 cache L2 cache Core configurations Speed per core (DMIPS / MHz) ARM part number (in the main ID register) ARM Cortex-A5: 1: 8: No VFPv4 (optional) 16 × 64-bit: 64 ...
A combined caching and home agent (CHA) handles resolution of coherency across multiple processors, as well as snoop requests from processor cores and local and remote agents. Separate physical CHAs are placed within each processor core and last level cache (LLC) bank to improve scalability according to the number of cores, memory controllers ...
Processors implement a set of these categories as required for their task. Different classes of processors are required to implement certain categories, for example a server-class processor includes the categories: Base, Server, Floating-Point, 64-Bit, etc. All processors implement the Base category. Power ISA is a RISC load/store architecture.