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22 lines
742 B
Plaintext
22 lines
742 B
Plaintext
SHORT Vectorization intensity
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EVENTSET
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PMC0 VPU_INSTRUCTIONS_EXECUTED
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PMC1 VPU_ELEMENTS_ACTIVE
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METRICS
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Runtime (RDTSC) [s] time
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Vectorization intensity PMC1/PMC0
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LONG
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Formulas:
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Vectorization intensity = VPU_ELEMENTS_ACTIVE / VPU_INSTRUCTIONS_EXECUTED
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-
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Vector instructions include instructions that perform floating-point
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operations, instructions that load vector registers from memory and store them
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to memory, instructions to manipulate vector mask registers, and other special
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purpose instructions such as vector shuffle.
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According to the book 'Intel Xeon Phi Coprocessor High-Performance Programming'
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by James Jeffers and James Reinders, the vectorization intensity should be >=8
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for double precision and >=16 for single precision.
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