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izzet merged 2 commits into from
Mar 20, 2026
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Rename dlio preset to dlio-prev and update test cases #53

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Rename dlio preset to dlio-prev and update test cases for new preset …
izzet Mar 20, 2026
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Update README and getting-started documentation for dlio preset chang…
izzet Mar 20, 2026
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89 changes: 47 additions & 42 deletions README.md
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Expand Up @@ -62,53 +62,58 @@ This command analyzes the traces and prints a high-level summary of the applicat

```bash
Time Period Summary
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━┓
┃ Metric ┃ Unit ┃ Value ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━┩
│ Job Time │ seconds │ 56.695 │
│ Total Count │ count │ 15,901 │
│ Total Files │ count │ 87 │
│ Total Nodes │ count │ 0 │
│ Total Processes │ count │ 23 │
│ App Count │ count │ 8 │
│ Training Count │ count │ 40 │
│ Compute Count │ count │ 200 │
│ Fetch Data Count │ count │ 160 │
│ Data Loader Count │ count │ 808 │
│ Data Loader Fork Count │ count │ 96 │
│ Reader Count │ count │ 4,008 │
│ Reader POSIX (Lustre) Count │ count │ 10,432 │
│ Reader POSIX (Lustre) Size │ MB │ 111833.161 │
│ Reader POSIX (Lustre) Bandwidth │ MB/s │ 874.982 │
│ Reader POSIX (Lustre) Avg Transfer Size │ MB │ 10.720 │
│ Checkpoint Count │ count │ 8 │
│ Checkpoint POSIX (Lustre) Count │ count │ 45 │
│ Checkpoint POSIX (Lustre) Size │ MB │ 0.011 │
│ Checkpoint POSIX (Lustre) Bandwidth │ MB/s │ 0.791 │
│ Checkpoint POSIX (Lustre) Avg Transfer Size │ MB │ 0.000 │
│ Other POSIX Count │ count │ 96 │
└───────────────────────────────────────────────────────────────────────────────┴────────────────┴────────────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Metric ┃ Unit ┃ Value ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━┩
│ Job Time │ seconds │ 56.695 │
│ Total Count │ count │ 18,039 │
│ Total Files │ count │ 166 │
│ Total Nodes │ count │ 1 │
│ Total Processes │ count │ 8 │
│ App Count │ count │ 8 │
│ Training Count │ count │ 8 │
│ Epoch Count │ count │ 40 │
│ Compute Count │ count │ 200 │
│ Fetch Data Count │ count │ 160 │
│ Checkpoint Count │ count │ 8 │
│ Data Loader Count │ count │ 816 │
│ Data Loader Fork Count │ count │ 96 │
│ Reader Count │ count │ 3,200 │
│ POSIX - All Count │ count │ 10,581 │
│ POSIX - All Size │ MB │ 111833.172 │
│ POSIX - All Bandwidth │ MB/s │ 6048.367 │
│ POSIX - All Avg Transfer Size │ MB │ 10.569 │
│ POSIX - Reader Count │ count │ 10,432 │
│ POSIX - Reader Size │ MB │ 111833.161 │
│ POSIX - Reader Bandwidth │ MB/s │ 6095.909 │
│ POSIX - Reader Avg Transfer Size │ MB │ 10.720 │
│ POSIX - Checkpoint Count │ count │ 45 │
│ POSIX - Checkpoint Size │ MB │ 0.011 │
│ POSIX - Checkpoint Bandwidth │ MB/s │ 2.525 │
│ POSIX - Checkpoint Avg Transfer Size │ MB │ 0.000 │
└───────────────────────────────────────────────────────────────────────────┴──────────────────┴───────────────────────┘
```

DFAnalyzer also provides a detailed breakdown of performance metrics for each layer of the application. Here is a snippet of the "Layer Breakdown" section from the same run, which includes the percentage of time each layer overlaps with its parent layer:

```bash
Layer Breakdown (w/ overlap %)
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
┃ Layer ┃ Time (s) ┃ Ops ┃ Ops/sec ┃ Size (MB) ┃ Bandwidth (MB/s) ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
│ App │ 441.967 (----) │ 8 (----) │ 0.018 │ - │ - │
│ Training │ 439.442 (----) │ 40 (----) │ 0.091 │ - │ - │
│ Compute │ 272.356 (----) │ 200 (----) │ 0.734 │ - │ - │
│ Fetch Data │ 126.179 ( 16%) │ 160 ( 25%) │ 1.268 │ - │ - │
│ Data Loader │ 151.471 ( 45%) │ 808 ( 46%) │ 5.334 │ - │ - │
│ Data Loader Fork │ 2.392 ( 0%) │ 96 ( 0%) │ 40.135 │ - │ - │
│ Reader │ 299.992 ( 40%) │ 4,008 ( 51%) │ 13.360 │ - │ - │
│ Reader POSIX (Lustre) │ 127.812 ( 45%) │ 10,432 ( 48%) │ 81.620 │ 111833.161 ( 46%) │ 874.982 │
│ Checkpoint │ 0.014 ( 0%) │ 8 ( 0%) │ 571.551 │ - │ - │
│ Checkpoint POSIX (Lustre) │ 0.014 ( 0%) │ 45 ( 0%) │ 3268.686 │ 0.011 ( 0%) │ 0.791 │
│ Other POSIX │ 2.392 ( 0%) │ 96 ( 0%) │ 40.135 │ 0.000 (----) │ - │
└─────────────────────────────┴──────────────────┴────────────────┴───────────┴────────────────────┴──────────────────┘
Layer Breakdown (w/ overlap %)
┏━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━┓
┃ Layer ┃ Time (s) ┃ Ops ┃ Ops/sec ┃ Size (MB) ┃ Bandwidth (MB/s) ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━┩
│ App │ 55.246 (----) │ 8 (----) │ 0.145 │ - │ - │
│ Training │ 55.246 (----) │ 8 (----) │ 0.145 │ - │ - │
│ Epoch │ 54.937 (----) │ 40 (----) │ 0.728 │ - │ - │
│ Compute │ 40.854 (----) │ 200 (----) │ 4.895 │ - │ - │
│ Fetch Data │ 16.889 (----) │ 160 (----) │ 9.474 │ - │ - │
│ Checkpoint │ 0.005 (----) │ 8 (----) │ 1762.503 │ - │ - │
│ Data Loader │ 21.871 ( 54%) │ 816 ( 57%) │ 37.310 │ - │ - │
│ Data Loader Fork │ 0.181 ( 0%) │ 96 ( 0%) │ 530.903 │ - │ - │
│ Reader │ 21.480 ( 55%) │ 3,200 ( 67%) │ 148.979 │ - │ - │
│ POSIX - All │ 18.490 ( 54%) │ 10,581 ( 59%) │ 572.261 │ 111833.172 ( 59%) │ 6048.367 │
│ POSIX - Reader │ 18.346 ( 55%) │ 10,432 ( 60%) │ 568.637 │ 111833.161 ( 59%) │ 6095.909 │
│ POSIX - Checkpoint │ 0.004 (----) │ 45 (----) │ 10433.573 │ 0.011 (----) │ 2.525 │
└────────────────────────┴──────────────────┴─────────────────┴─────────────┴──────────────────────┴───────────────────┘
```

## Further Information
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