Reduce P0 DeviceTransform benchmarks to babelstream and fill

[bernhardmgruber]

Follow-up to #9774

Current P0 list (removed P1 manually):

$ ../benchmarks/scripts/search.py -R '^(?!.*segmented).*(scan|reduce|select|sort|transform\.(babelstream|fill)).*' -l
 ctk:  13.3.33
cccl:  v3.5.0.dev-438-g01871df097
### Benchmarks
  * `cub.bench.find_bound.lower_bound_sorted_values`: 1 variants: 
  * `cub.bench.find_bound.upper_bound_sorted_values`: 1 variants: 
  * `cub.bench.merge_sort.keys`: 1 variants: 
  * `cub.bench.merge_sort.pairs`: 1 variants: 
  * `cub.bench.radix_sort.keys`: 1 variants: 
  * `cub.bench.radix_sort.pairs`: 1 variants: 
  * `cub.bench.reduce.arg_extrema`: 1 variants: 
  * `cub.bench.reduce.by_key`: 1 variants: 
  * `cub.bench.reduce.custom`: 1 variants: 
  * `cub.bench.reduce.deferred_nondeterministic`: 1 variants: 
  * `cub.bench.reduce.deferred_sum`: 1 variants: 
  * `cub.bench.reduce.deterministic`: 1 variants: 
  * `cub.bench.reduce.min`: 1 variants: 
  * `cub.bench.reduce.nondeterministic`: 1 variants: 
  * `cub.bench.reduce.sum`: 1 variants: 
  * `cub.bench.reduce.warp_reduce_min`: 1 variants: 
  * `cub.bench.reduce.warp_reduce_sum`: 1 variants: 
  * `cub.bench.scan.exclusive.by_key`: 1 variants: 
  * `cub.bench.scan.exclusive.custom`: 1 variants: 
  * `cub.bench.scan.exclusive.deterministic`: 1 variants: 
  * `cub.bench.scan.exclusive.sum`: 1 variants: 
  * `cub.bench.scan.exclusive.sum.lookahead`: 1 variants: 
  * `cub.bench.select.flagged`: 1 variants: 
  * `cub.bench.select.if`: 1 variants: 
  * `cub.bench.select.unique`: 1 variants: 
  * `cub.bench.select.unique_by_key`: 1 variants: 
  * `cub.bench.transform.babelstream`: 1 variants: 
  * `cub.bench.transform.fill`: 1 variants: 
  * `cub.bench.transform_reduce.sum`: 1 variants: 

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📥 Commits

Reviewing files that changed from the base of the PR and between f771627 and 4b61bc6.

📒 Files selected for processing (1)

• benchmarks/scripts/cccl/bench/search.py

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Refined P0 benchmark filtering to include only the intended transform benchmarks while continuing to exclude segmented variants.

Walkthrough

The P0 benchmark filter in filter_benchmarks now limits transform matches to transform.babelstream and transform.fill, while preserving existing scan, reduce, select, sort, and segmented benchmark exclusions.

Changes

P0 benchmark filtering

Layer / File(s)	Summary
Narrow P0 transform selection benchmarks/scripts/cccl/bench/search.py	The --P0 regex now matches only transform.babelstream and transform.fill instead of all transform.* benchmarks.

Possibly related PRs

• NVIDIA/cccl#9774: Updates the same filter_benchmarks P0 transform-matching regex.

Suggested reviewers: shwina, gevtushenko

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