Multi Core Processor

Submitted by: Lizolen

Pradhan 0921209041

OutlineOverviewMoore’s lawDesignHow a multi processor worksPerformanceAdvantages and Disadvantages

Some TerminologyCoreDieThreadClock speed

Multi-core Processors - OverviewWhat are multi-core processors?

Integrated circuit(IC) chips containing more than one identical physical processor(core) in the same IC package. OS perceives each core as a discrete processor

Each core has its own complete set of resources, and may share the on-die cache layer

Moore’s law

DesignSingle core architecture

Drawbacks of unicore processorDifficult to make single-core

Clock frequencies even higherDeeply pipelined circuits

Heat problemsSpeed of light problems Difficult design and verificationLarge design Server farms need expensive air-conditioning

Many new applications are multithreadedGeneral trend in computer architecture (shift

towards more parallelism

Multi-core architecture

How multi-core processor Work?

Multi-core & Multi-threading

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AdvantagesThread level parallelismGreat energy efficientPerformanceLower costFasterBetter heat dissipationEase of use

DisadvantagesAdjustment to existing software required

Memory bandwidth limit the real performance avdvantage

What application benefits from multi-core?Database serversWeb serversCompilersMultimedia applicationsScientific applications CAD/CAMIn general application s with

Thread-level parallelism

ConclusionMulticore chips an

important new trend incomputer architecture

Several new multi-corechips in design phases

Parallel programming techniques likely to gain

importance

Thank you