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Wed 7 Jan 2009, 18:58

Which OS? Considerations for Performance asymmetric, Multi-core Platforms


On Wed 7 Jan 2009, at 18:58, Intel Software Network Graphics Feed wrote:

Which OS? Considerations for Performance asymmetric, Multi-core Platforms
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Download Which OS? Considerations for Performance asymmetric, Multi-core Platforms [PDF 188KB]

Abstract

The long-standing assumption for developers writing for a parallel environment has been that all processors in a system deliver equal computational performance for their algorithms. This will change as more cores are packed onto a chip. And, it turns out that this performance asymmetry has a significant impact on application scalability and predictability under today's operating systems. This article looks at future performance-asymmetric processors and operating system challenges for performance-asymmetric, many-core processors.

Performance Asymmetry and the Developer

Persistent evolution of processor architectures is critical to meet the continuous demands of increasing performance and performance per watt in computing. Ongoing research into performance-asymmetric, multi-core processor topologies reveals that mixing complex, fast cores and simpler, slower cores on the same die "enables fast parallel performance, fast serial performance, and lower cost than to produce all high-performance cores" on a die. [4]

Performance asymmetry, as opposed to functional asymmetry, is a topology where cores are based on the same instruction set architecture (ISA) but have different performance characteristics, such as clock speed, issue width, or in-order vs. out-of-order. Functional ...
Filed under: Parallel Programming and Multi-Core
Source: Intel Software Network Graphics Feed
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