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Performance Issues -
Cache &Bandwidth
¨Performance instability
ãSmall changes in the architecture may cause dramatic changes in delivered performance.
¨Latency tolerant and bandwidth aware algorithms and software are critical
ãSometimes this means recompute rather than store/load
¨Need to help the compiler
¨Today we have a hard time getting performance
ãOnly going to get harder
¨BLAS as a starting point