Analysis of hardware prefetching across virtual page boundaries

  title={Analysis of hardware prefetching across virtual page boundaries},
  author={Ronald G. Dreslinski and Ali G. Saidi and Trevor N. Mudge and Steven K. Reinhardt},
  booktitle={Conf. Computing Frontiers},
Data cache prefetching in the L2 is at the forefront of pre-fetching research. In this paper we analyze the impact of virtual page boundaries on these prefetchers. Conservative measurements on real hardware show that 30-50% of consecutive virtual pages are mapped to pages which are not consecutive in physical memory. Advanced hardware prefetching techniques that detect access patterns which span virtual page boundaries often end up prefetching data that is from the wrong physical page… CONTINUE READING


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