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Accommodating workload diversity in chip multiprocessors

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As logic elements continue to shrink due to advances in fabrication technology, integrating multiple processors into a single component becomes more practical, and in fact a number of current designs implement multiple processors on a single component or chip.Chip multiprocessors (CMPs) hold the prospect of delivering long-term performance scalability while dramatically reducing design complexity compared to monolithic wide-issue processors.By applying the speculative depth estimator to dynamic resource tuning, the experiments results show that a good trade-off between concurrency exploitation and resource utilization is achieved. (2010) Dynamic Resource Tuning for Flexible Core Chip Multiprocessors. While technology trends have ushered in the age of chip multiprocessors (CMP), a fundamental question is what size to make each core.FCMPs introduce a new resource allocation and scheduling problem which must determine how many logical processors should be configured, how powerful each processor should be, and where/when each task should run.This paper introduces and motivates this problem, describes the challenges associated with it, and evaluates algorithms appropriate for multitasking on FCMPs.Complexity is reduced by designing and verifying a single, relatively simple core, and then replicating it.Chip Multiprocessors are becoming common as the cost of increasing chip power begins to limit single core performance.

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Some researchers have proposed asymmetric CMPs (ACMP) consisting of multiple types of cores.Many techniques have been proposed in this area, and some of them have been implemented such as the well-known DVFS technique which is used in nearly all modern microprocessors. The Applications of Computational Intelligence CI and Soft Computing tool in Bioinformatics is also one of his interests. This paper explores the concepts of multi-core, trending research areas in the field of multi-core processors and then concentrates on power management issues in multi-core architectures. He served as a member of the international program committees of numerous international conferences. Improving the performance of computer or other processing systems generally improves overall throughput and/or provides a better user experience.One technique of improving the overall quantity of instructions processed in a system is to increase the number of processors in the system.A reconfigurable multiprocessor system including a number of processing units and components enabling executing sequential code collectively at processing units and enabling changing the architectural configuration of the processing units.a plurality of processor units, wherein the plurality of processor units are independent cores and dynamically fused into a single processor, wherein the single processor is dynamically split into distinct processing units at run time; andat least one cross unit connection component operatively connecting at least two processor units from said plurality of processor units, said at least one cross unit connection component reconfigurably linking one processor unit to another processor unit, thereby fusing them as a single processor, said reconfigurable linking adjusting processing to sequential when in a fused mode and to parallel when in a split mode; said at least one cross unit connection component enabling collective fetching and providing instructions to be executed collectively by said at least two processor units and collectively committing executed instructions by said at least two processor units; said collective fetching comprising cooperatively fetching an instruction block; said instruction block comprising a number of subsets, said fetching being performed cooperatively by fetching a one subset of said instruction block by each of said at least two processor units, when the processor units are in the fused mode; said instruction block comprising each subsets of instructions fetched by each of said at least two processor units; said instruction block being constructed from each subset of instructions fetched by each of said at least two processor units; said collective fetching enabling operation of said at least two processor units substantially as a single processor unit; whereby executing sequential code collectively at processor units is enabled; andwhen changing manner of processing from fused to split or from split to fused, bringing an internal state of said plurality of processing units to a form consistent with a new configuration, resulting from the reconfiguring of cross connection unit, andsaid at least two processor units from said plurality of processor units and enabling reconfigurably linking one processor unit to another processor unit, and of enabling collective fetching and branch prediction; a second cross unit connection component reconfigurably and operatively connected to said at least two processor units from said plurality of processor units, said second cross unit connection component enabling steering and renaming instructions for/from each processor unit;a third cross unit connection component reconfigurably and operatively connecting said at least two processor units from said plurality of processor units and enabling transfer of output instruction values from one processor unit as input instruction values to another processor unit;a fourth cross unit connection component reconfigurably and operatively connecting at least two processor units from said plurality of processor units, said fourth cross unit connection component enabling transferring signals between reorder buffer memories in processor units from said plurality of processor units, and of enabling collective instruction commit.a fetch management component operatively connected to said first cross unit connection component, said fetch management component enabling coordinating distributed operation of fetch components in each processor unit.a steering management component enabling steering and renaming instructions for/from each processor unit; and said steering management component being operatively connected to each processor unit through said second cross unit connection component.6.