Question: 4. Superscalar capability makes the processor execute several instructions at the same time. This is called instruction-level-parallelism. We measure the performance of this hardware using

4. Superscalar capability makes the processor execute several instructions at the

4. Superscalar capability makes the processor execute several instructions at the same time. This is called instruction-level-parallelism. We measure the performance of this hardware using IPC (Instructions per cycle). a) Is higher IPC better? Or lower is better? And why? b) What is the relationship between IPC and CPI. c) Why is speculative execution needed to get the best performance from superscalar processors

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