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- common.nsys_profile_flags(): shared nsys profile flags, adding
--cuda-event-trace=false on nsys 2025.1+ (on by default there, it widens
the host gaps between steps; kernel times are unchanged). nsys 2024.5
rejects the flag, so it is detected from the help text.
- cf/run_probes.py: 3x3, 5x5, 7x7, 9x9 at 1, 4 and 8 streams.
- cf/results/A100/: Merlin7 A100 runs, f32 and f64 with lround, and f32
with round (104e284) at 20k/2000 and 50k/3000. README lists them.
GPU performance probes
Nsight Systems probes for the CUDA classes: per-engine GPU time per frame
(kernel, H2D, D2H), duty cycles and the roofline. One folder per class, each
with its own driver, traced process, README and results/:
| folder | class |
|---|---|
cf/ |
ClusterFinderCUDA |
Shared by all of them:
| file | role |
|---|---|
common.py |
paths (AARE_REPO, AARE_BUILD, AARE_PERF_DATA, NSYS), guards (fresh build, idle GPU), env.json stamp, results folder |
gpu_span.py |
reads an nsys SQLite export: busy time, duty cycle and roofline per engine, optionally for one kernel name only |
Requirements (a CUDA build of the Python extension, Nsight Systems, the dataset, an idle GPU) are listed in each folder's README.