High CPI

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High Clocks Per Instruction Retired when vectorizing the loop. [Knowledgebase]
Introduction Sometimes when we vectorize a loop, we get a high Clocks Per Instruction Retired (CPI) value. This happens when there is high bus utilization and the bus gets saturated. The subtrac ...

Posted: 2009-07-14 03:49:00 by 		simd, SSE2, SSE3, SSE4, SSE, High CPI, Vectorizer, hardware prefetcher, SSE1, Memoray latency, BUS Saturation, Vtune
CPI, CPu, Hyperthreading ( core i7 ) [Forums]
I'm currently examining the impact of hyperthreading to different code snippets. While measuring the expected values with the most tests there is one test wich produces a confusing CPI.     for ( ...

Posted: 2008-12-18 06:58:55 by lkleen		High CPI, hyperthreading, LSD, Core i7