CPI: Cycle per Instruction. The instruction count in the performance equation is the “dynamic”instruction count. 0000005309 00000 n
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The Classic CPU Performance Equation in terms of instruction count (the number of instructions executed by the program), CPI, and clock cycle time: CPU time=Instruction count * CPI * Clock cycle time or. Execution time: CPI * I * 1/CR CPI = Cycles Per Instruction I = Instructions. H��W�r�H}�WtռH)�f_I�*Y�k�T��-+��d����()�q�c�{� ݼH���gL��F�i���u�l�䟶���߮��i#��Y��T%������H���lʢ�H�o���4�+�����?��
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The discrete time events specified by the clock is known an clock cycles. stream
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In this dissertation we propose and investigate a new approach to CPU performance evaluation. 0000002218 00000 n
Boussinesq’s 1872 paper introduces the equations now known as the 3-5 pipeline steps (ARM, SA, R3000) { Attempt to get C down to 1 { Problem: stalls due to control/data hazards Super-Pipelining { e.g. Since around 2005–2007, Dennard scaling has ended, so even though Moore's law continued for several years after that, it has not yielded dividends in improved performance. endobj
b. Many processors expose performance-monitoring counters that help measure 'productive performance' associated with workloads. 20% of the dynamic instructions in an application are multiplies. <>
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• The CPI can be divided into TWO component terms; x�b```f``Z������ Ā B�@���1&�( py��uN��8�q0�a�c0R����˰��R���1�A�A�AiSt���Nz:WX'1VH[#���`��Z�U���ˠh�t�q#�A��0��v The first step should be to find out the cycles per Instruction for P3. Background loop with an “observation” variable. 0000000016 00000 n
CPU Time = I * CPI / R. R = 1/T the clock rate. extern INT8U ping; while(1) /* endless loop – spin in … T = Clock cycle time. 0000001291 00000 n
The hydrologic uncertainty processor (HUP) has been widely employed in hydrological uncertainty prediction. <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 1024.08 768] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>>
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