Wednesday, March 30, 2016

Intel x86 Computer Processor Architecture

Intel x86 Computer Processor Architecture




http://www.computerweekly.com/opinion/Intel-x86-and-IBM-POWER-CPUs-Which-When-Why
... Intel does everything well  Intel x86 made its mass market debut in 1982 in the IBM PC, known as the Intel 8088. That’s over 30 years’ ago. Since then, Intel has made significant enhancements to the instruction set architecture to keep it relevant in a market where 18 months is obsolescence. They moved from 16-bit to 32-bit and now 64-bit. They have added hardware accelerators on the chip, and they have even built Risc instruction into the architecture to speed up some of the Cics instructions that plagued performance. Intel x86 runs in everything from supercomputers to servers to desktops and laptops. Intel does everything well. Some would say “good enough”. [survived iAPX432 and Itanium designed to replace it]

vs IBM power: mission-critical applications.  The current IBM Power architecture design began in 1997 and the processor was announced in 2001 as the Power4. It was the first multicore processor in the industry. Comparing the x86 and Power processors on a micro-benchmark level will show little raw performance advantages for either. Comparing the two using enterprise workloads will demonstrate a significant advantage for Power in data workloads such as databases, data warehouses, data transaction processing, data encryption/compression, and certainly in high-performance computing, which most in business think of as analytics.

IBM fielded the Power4 processor back in October 2001, which was the first RISC/Unix processor to have two cores and to break the 1 GHz clock speed barrier

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