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CPU Queen
This simple integer benchmark focuses on the branch prediction capabilities and the misprediction penalties of the CPU. It finds the solutions for the classic ''Queens problem'' on a 10 by 10 sized chessboard (http://mathworld.wolfram.com/QueensProblem.html).
At the same clock speed theoretically the processor with the shorter pipeline and smaller misprediction penalties will attain higher benchmark scores. For example -- with HyperThreading disabled -- the Intel Northwood core processors get higher scores than the Intel Prescott core based ones due to the 20-step vs 31-step long pipeline. However, with enabled HyperThreading the picture is controversial, because due to architectural bottlenecks the Northwood core runs out of internal resources and slows down. Similarly, at the same clock speed AMD K8 class processors will be faster than AMD K7 ones due to the improved branch prediction capabilities of the K8 architecture.
CPU Queen test uses only the basic x86 intructions, it consumes less than 1 MB system memory and it is HyperThreading, multi-processor (SMP) and multi-core (CMP) aware.
CPU PhotoWorxx
This integer benchmark peforms different common tasks used during digital photo processing.
It performs the following tasks on a very large RGB image:
- Fill
- Flip
- Rotate90R (rotate 90 degrees CW)
- Rotate90L (rotate 90 degrees CCW)
- Random (fill the image with random coloured pixels)
- RGB2BW (colour to black & white conversion)
- Difference
This benchmark stresses the integer arithmetic and multiplication execution units of the CPU and also the memory subsystem. Due to the fact that this test performs high memory read/write traffic, it cannot effectively scale in situations where more than 2 processing threads used. For example, on a 8-way Pentium III Xeon system the 8 processing threads will be ''fighting'' over the memory, creating a serious bottleneck that would lead to as low scores as a 2-way or 4-way similar processor based system could achieve.
CPU PhotoWorxx test uses only the basic x86 intructions, and it is HyperThreading, multi-processor (SMP) and multi-core (CMP) aware.
CPU ZLib
This integer benchmark measures combined CPU and memory subsystem performance through the public ZLib compression library Version 1.2.2 (http://www.zlib.net).
CPU ZLib test uses only the basic x86 intructions, and it is HyperThreading, multi-processor (SMP) and multi-core (CMP) aware.
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