Raw data for the Memory Exclusion Paper

  • STSWM
  • NNET
  • SOLVE
  • CELL
  • EIGEN
  • PRISM
  • PCELL
  • PSOLVE

    New Data (8/12/96)

    In a footnote to the paper submission, we say: `` There is an apparent anomaly in Figure 3 that should be explained. This is the fact that in NNET, SOLVE and CELL, incremental checkpointing improves the overhead even though the checkpoint sizes are the same. This should not be the case --- incremental checkpointing should actually penalize performance here because since the same amount of data is being written to disk, and there is extra overhead processing SEGV signals. This anomaly arises because the operating system buffers user writes that do not fall on page boundaries, and libckpt does not take account of this fact in non-incremental checkpointing. This bug will be fixed shortly, and new data will be taken so that this anomaly is no longer present.''

    We have fixed this bug so that all writes occur on page boundaries. The new figure 3 is here, and the new raw data files are below. Note that there are more runs per datum as well in these tests.

  • STSWM
  • NNET
  • SOLVE
  • CELL
  • EIGEN