[Backport 3.1]: [CUB] Replace several direct uses of `__clz` (#6099) #6202

miscco · 2025-10-13T13:11:08Z

Replace __clz in warp_scan_shfl.cuh.
Replace __clz in block_radix_rank.cuh
Replace __clz in warp_reduce_shfl.cuh
Replace __clz in warp_reduce_smem.cuh
Replace thrust's clz with cuda::std::countl
Fully qualify with ::cuda
Fixup types or copy paste mistakes
Address review comments, countr_zero instead of countl(brev())
Use __bit_log2 for warp ballot index.
Use __bit_log2 for block leader in ComputeRanksItem
Ensure that we static cast in __clz to int in case we deal with ARM
Rename variable to not conflict with builtin
Use __bit_log2
Fix incorrect transformation
Drop internal clz function in favor of countl_zero
Drop unneeded include
Fix return type of __ballot_sync to unsigned
fix typo
Be super safe about unsigned integers
Fix argument type in radix_rank

* Replace `__clz` in `warp_scan_shfl.cuh`. * Replace `__clz` in `block_radix_rank.cuh` * Replace `__clz` in `warp_reduce_shfl.cuh` * Replace `__clz` in `warp_reduce_smem.cuh` * Replace thrust's `clz` with `cuda::std::countl` * Fully qualify with `::cuda` * Fixup types or copy paste mistakes * Address review comments, `countr_zero` instead of `countl(brev())` * Use __bit_log2 for warp ballot index. * Use `__bit_log2` for block leader in ComputeRanksItem * Ensure that we static cast in `__clz` to int in case we deal with ARM * Rename variable to not conflict with builtin * Use `__bit_log2` * Fix incorrect transformation * Drop internal `clz` function in favor of `countl_zero` * Drop unneeded include * Fix return type of `__ballot_sync` to unsigned * fix typo * Be super safe about unsigned integers * Fix argument type in radix_rank --------- Co-authored-by: Michael Schellenberger Costa <[email protected]>

bernhardmgruber · 2025-10-13T14:04:29Z

#6099, the source of this backport, omitted a performance analysis of the change. Let's wait with merging this until we know that it does not regress.

github-actions · 2025-10-13T16:43:14Z

🟨 CI finished in 2h 22m: Pass: 99%/205 | Total: 3d 14h | Avg: 25m 11s | Max: 1h 57m | Hits: 75%/338630

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  🟩 GCC10              Pass: 100%/2   | Total:  7m 32s | Avg:  3m 46s | Max:  4m 06s | Hits:  99%/1168  
  🟩 GCC11              Pass: 100%/1   | Total:  4m 09s | Avg:  4m 09s | Max:  4m 09s | Hits:  99%/583   
  🟩 GCC12              Pass: 100%/1   | Total:  4m 14s | Avg:  4m 14s | Max:  4m 14s | Hits:  99%/583   
  🟩 GCC13              Pass: 100%/8   | Total: 39m 12s | Avg:  4m 54s | Max:  9m 49s | Hits:  99%/4664  
  🟩 MSVC14.39          Pass: 100%/1   | Total: 15m 47s | Avg: 15m 47s | Max: 15m 47s | Hits:  95%/282   
  🟩 MSVC14.43          Pass: 100%/3   | Total: 47m 13s | Avg: 15m 44s | Max: 16m 14s | Hits:  95%/852   
  🟩 NVHPC25.5          Pass: 100%/2   | Total: 15m 16s | Avg:  7m 38s | Max:  7m 53s | Hits:  97%/1162  
🟩 cxx_family
  🟩 Clang              Pass: 100%/10  | Total: 42m 10s | Avg:  4m 13s | Max: 10m 35s | Hits:  99%/5832  
  🟩 GCC                Pass: 100%/12  | Total: 55m 07s | Avg:  4m 35s | Max:  9m 49s | Hits:  99%/6998  
  🟩 MSVC               Pass: 100%/4   | Total:  1h 03m | Avg: 15m 45s | Max: 16m 14s | Hits:  95%/1134  
  🟩 NVHPC              Pass: 100%/2   | Total: 15m 16s | Avg:  7m 38s | Max:  7m 53s | Hits:  97%/1162  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 10m 00s | Avg:  5m 00s | Max:  6m 43s | Hits:  99%/1166  
  🟩 rtx2080            Pass: 100%/26  | Total:  2h 45m | Avg:  6m 22s | Max: 16m 14s | Hits:  98%/13960 
🟩 jobs
  🟩 Build              Pass: 100%/25  | Total:  2h 28m | Avg:  5m 56s | Max: 16m 14s | Hits:  98%/13377 
  🟩 Test               Pass: 100%/3   | Total: 27m 07s | Avg:  9m 02s | Max: 10m 35s | Hits:  99%/1749  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 10m 00s | Avg:  5m 00s | Max:  6m 43s | Hits:  99%/1166  
  🟩 90;90a             Pass: 100%/2   | Total: 19m 15s | Avg:  9m 37s | Max: 15m 31s | Hits:  97%/867   
  🟩 100;120            Pass: 100%/2   | Total: 20m 07s | Avg: 10m 03s | Max: 16m 14s | Hits:  97%/867   
🟩 std
  🟩 17                 Pass: 100%/3   | Total: 14m 24s | Avg:  4m 48s | Max:  7m 23s | Hits:  98%/1747  
  🟩 20                 Pass: 100%/25  | Total:  2h 41m | Avg:  6m 26s | Max: 16m 14s | Hits:  98%/13379

🟩 python: Pass: 100%/18 | Total: 2h 59m | Avg: 9m 59s | Max: 20m 44s

🟩 cpu
  🟩 amd64              Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 ctk
  🟩 12.9               Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 cxx
  🟩 GCC13              Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 cxx_family
  🟩 GCC                Pass: 100%/18  | Total:  2h 59m | Avg:  9m 59s | Max: 20m 44s
🟩 gpu
  🟩 h100               Pass: 100%/8   | Total:  1h 09m | Avg:  8m 40s | Max: 14m 31s
  🟩 rtxa6000           Pass: 100%/10  | Total:  1h 50m | Avg: 11m 02s | Max: 20m 44s
🟩 jobs
  🟩 Build cuda.cccl    Pass: 100%/2   | Total: 16m 36s | Avg:  8m 18s | Max:  8m 25s
  🟩 Test cuda.cccl.cooperative Pass: 100%/4   | Total:  1h 00m | Avg: 15m 05s | Max: 20m 44s
  🟩 Test cuda.cccl.examples Pass: 100%/4   | Total: 19m 27s | Avg:  4m 51s | Max:  5m 13s
  🟩 Test cuda.cccl.headers Pass: 100%/4   | Total: 19m 19s | Avg:  4m 49s | Max:  4m 55s
  🟩 Test cuda.cccl.parallel Pass: 100%/4   | Total:  1h 04m | Avg: 16m 02s | Max: 18m 40s
🟩 py_version
  🟩 3.10               Pass: 100%/9   | Total:  1h 28m | Avg:  9m 48s | Max: 18m 02s
  🟩 3.13               Pass: 100%/9   | Total:  1h 31m | Avg: 10m 10s | Max: 20m 44s

🟩 packaging: Pass: 100%/4 | Total: 19m 16s | Avg: 4m 49s | Max: 6m 58s

🟩 cpu
  🟩 amd64              Pass: 100%/4   | Total: 19m 16s | Avg:  4m 49s | Max:  6m 58s
🟩 ctk
  🟩 12.0               Pass: 100%/2   | Total:  6m 07s | Avg:  3m 03s | Max:  3m 06s
  🟩 12.9               Pass: 100%/2   | Total: 13m 09s | Avg:  6m 34s | Max:  6m 58s
🟩 cudacxx
  🟩 nvcc12.0           Pass: 100%/2   | Total:  6m 07s | Avg:  3m 03s | Max:  3m 06s
  🟩 nvcc12.9           Pass: 100%/2   | Total: 13m 09s | Avg:  6m 34s | Max:  6m 58s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 19m 16s | Avg:  4m 49s | Max:  6m 58s
🟩 cxx
  🟩 Clang14            Pass: 100%/1   | Total:  3m 01s | Avg:  3m 01s | Max:  3m 01s
  🟩 Clang19            Pass: 100%/1   | Total:  6m 58s | Avg:  6m 58s | Max:  6m 58s
  🟩 GCC12              Pass: 100%/1   | Total:  3m 06s | Avg:  3m 06s | Max:  3m 06s
  🟩 GCC13              Pass: 100%/1   | Total:  6m 11s | Avg:  6m 11s | Max:  6m 11s
🟩 cxx_family
  🟩 Clang              Pass: 100%/2   | Total:  9m 59s | Avg:  4m 59s | Max:  6m 58s
  🟩 GCC                Pass: 100%/2   | Total:  9m 17s | Avg:  4m 38s | Max:  6m 11s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 19m 16s | Avg:  4m 49s | Max:  6m 58s
🟩 jobs
  🟩 Test               Pass: 100%/4   | Total: 19m 16s | Avg:  4m 49s | Max:  6m 58s

🟩 stdpar: Pass: 100%/4 | Total: 15m 31s | Avg: 3m 52s | Max: 3m 57s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total:  7m 48s | Avg:  3m 54s | Max:  3m 57s
  🟩 arm64              Pass: 100%/2   | Total:  7m 43s | Avg:  3m 51s | Max:  3m 52s
🟩 ctk
  🟩 12.9               Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 cxx
  🟩 NVHPC25.5          Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 15m 31s | Avg:  3m 52s | Max:  3m 57s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  7m 48s | Avg:  3m 54s | Max:  3m 57s
  🟩 20                 Pass: 100%/2   | Total:  7m 43s | Avg:  3m 51s | Max:  3m 52s

🟩 cccl_c_parallel: Pass: 100%/3 | Total: 23m 54s | Avg: 7m 58s | Max: 10m 59s | Hits: 98%/495

🟩 cpu
  🟩 amd64              Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 ctk
  🟩 12.9               Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 cxx
  🟩 GCC13              Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 cxx_family
  🟩 GCC                Pass: 100%/3   | Total: 23m 54s | Avg:  7m 58s | Max: 10m 59s | Hits:  98%/495   
🟩 gpu
  🟩 h100               Pass: 100%/1   | Total: 10m 41s | Avg: 10m 41s | Max: 10m 41s | Hits:  98%/165   
  🟩 rtx2080            Pass: 100%/2   | Total: 13m 13s | Avg:  6m 36s | Max: 10m 59s | Hits:  98%/330   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 14s | Avg:  2m 14s | Max:  2m 14s | Hits:  98%/165   
  🟩 Test               Pass: 100%/2   | Total: 21m 40s | Avg: 10m 50s | Max: 10m 59s | Hits:  98%/330

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
	CCCL Packaging
+/-	libcu++
+/-	CUB
+/-	Thrust
	CUDA Experimental
	stdpar
	python
	CCCL C Parallel Library
	Catch2Helper

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
+/-	CCCL Packaging
+/-	libcu++
+/-	CUB
+/-	Thrust
+/-	CUDA Experimental
+/-	stdpar
+/-	python
+/-	CCCL C Parallel Library
+/-	Catch2Helper

🏃‍ Runner counts (total jobs: 205)

#	Runner
128	`linux-amd64-cpu16`
23	`windows-amd64-cpu16`
14	`linux-amd64-gpu-h100-latest-1`
14	`linux-amd64-gpu-rtxa6000-latest-1`
12	`linux-arm64-cpu16`
11	`linux-amd64-gpu-rtx2080-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`

fbusato · 2025-10-13T16:52:58Z

thrust/thrust/detail/integer_math.h

  Integer num_bits           = 8 * sizeof(Integer);
  Integer num_bits_minus_one = num_bits - 1;

-  return num_bits_minus_one - clz(x);


thrust::detail::log2 will be deleted in #6188

fbusato · 2025-10-13T16:56:04Z

cub/cub/warp/specializations/warp_scan_shfl.cuh

+#include <cuda/std/__algorithm/clamp.h>
+#include <cuda/std/__bit/has_single_bit.h>


these two headers are never used if I'm not wrong

fbusato · 2025-10-13T16:58:05Z

cub/cub/block/block_radix_rank.cuh

+#include <cuda/std/__algorithm/max.h>
+#include <cuda/std/__bit/integral.h>
+#include <cuda/std/__functional/operations.h>
+#include <cuda/std/__type_traits/conditional.h>


looks unused

We use cuda::std::_If AFAIK

wmaxey · 2025-10-13T20:59:30Z

We shouldn't be addressing review comments in the backport unless there are material conflicts with the old branch. We should fix these issues in main first and either cherry-pick the changes to the backport or do another backport. That way we aren't cross-pollinating changes between branches.

github-actions · 2025-10-14T03:43:02Z

🟩 CI finished in 4h 47m: Pass: 100%/205 | Total: 4d 14h | Avg: 32m 13s | Max: 3h 06m | Hits: 75%/339883

🟩 cub: Pass: 100%/50 | Total: 2d 05h | Avg: 1h 03m | Max: 3h 06m | Hits: 70%/61506

🟩 cpu
  🟩 amd64              Pass: 100%/48  | Total:  2d 03h | Avg:  1h 03m | Max:  3h 06m | Hits:  70%/58998 
  🟩 arm64              Pass: 100%/2   | Total:  1h 59m | Avg: 59m 36s | Max:  1h 03m | Hits:  64%/2508  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  5h 29m | Avg:  1h 05m | Max:  1h 31m | Hits:  64%/6166  
  🟩 12.9               Pass: 100%/45  | Total:  1d 23h | Avg:  1h 03m | Max:  3h 06m | Hits:  70%/55340 
🟩 cudacxx
  🟩 ClangCUDA19        Pass: 100%/2   | Total:  1h 05m | Avg: 32m 41s | Max: 33m 24s | Hits:  70%/2157  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  5h 29m | Avg:  1h 05m | Max:  1h 31m | Hits:  64%/6166  
  🟩 nvcc12.9           Pass: 100%/43  | Total:  1d 22h | Avg:  1h 04m | Max:  3h 06m | Hits:  70%/53183 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total:  1h 05m | Avg: 32m 41s | Max: 33m 24s | Hits:  70%/2157  
  🟩 nvcc               Pass: 100%/48  | Total:  2d 03h | Avg:  1h 04m | Max:  3h 06m | Hits:  70%/59349 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  3h 49m | Avg: 57m 29s | Max:  1h 06m | Hits:  65%/5018  
  🟩 Clang15            Pass: 100%/2   | Total:  2h 15m | Avg:  1h 07m | Max:  1h 08m | Hits:  65%/2505  
  🟩 Clang16            Pass: 100%/2   | Total:  2h 08m | Avg:  1h 04m | Max:  1h 07m | Hits:  65%/2505  
  🟩 Clang17            Pass: 100%/2   | Total:  2h 06m | Avg:  1h 03m | Max:  1h 03m | Hits:  65%/2505  
  🟩 Clang18            Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 07m | Hits:  65%/2505  
  🟩 Clang19            Pass: 100%/7   | Total:  5h 10m | Avg: 44m 21s | Max:  1h 04m | Hits:  76%/8421  
  🟩 GCC7               Pass: 100%/2   | Total:  2h 11m | Avg:  1h 05m | Max:  1h 07m | Hits:  64%/2508  
  🟩 GCC8               Pass: 100%/1   | Total:  1h 07m | Avg:  1h 07m | Max:  1h 07m | Hits:  64%/1254  
  🟩 GCC9               Pass: 100%/2   | Total:  2h 18m | Avg:  1h 09m | Max:  1h 15m | Hits:  64%/2508  
  🟩 GCC10              Pass: 100%/2   | Total:  2h 15m | Avg:  1h 07m | Max:  1h 11m | Hits:  64%/2509  
  🟩 GCC11              Pass: 100%/2   | Total:  2h 12m | Avg:  1h 06m | Max:  1h 06m | Hits:  64%/2505  
  🟩 GCC12              Pass: 100%/2   | Total:  2h 18m | Avg:  1h 09m | Max:  1h 15m | Hits:  64%/2505  
  🟩 GCC13              Pass: 100%/12  | Total: 11h 19m | Avg: 56m 35s | Max:  3h 06m | Hits:  79%/15057 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  3h 12m | Avg:  1h 36m | Max:  1h 41m | Hits:  65%/2298  
  🟩 MSVC14.43          Pass: 100%/4   | Total:  5h 54m | Avg:  1h 28m | Max:  1h 41m | Hits:  64%/4596  
  🟩 NVHPC25.5          Pass: 100%/2   | Total:  2h 42m | Avg:  1h 21m | Max:  1h 23m | Hits:  64%/2307  
🟩 cxx_family
  🟩 Clang              Pass: 100%/19  | Total: 17h 32m | Avg: 55m 24s | Max:  1h 08m | Hits:  69%/23459 
  🟩 GCC                Pass: 100%/23  | Total: 23h 41m | Avg:  1h 01m | Max:  3h 06m | Hits:  72%/28846 
  🟩 MSVC               Pass: 100%/6   | Total:  9h 07m | Avg:  1h 31m | Max:  1h 41m | Hits:  64%/6894  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 42m | Avg:  1h 21m | Max:  1h 23m | Hits:  64%/2307  
🟩 gpu
  🟩 h100               Pass: 100%/3   | Total:  1h 31m | Avg: 30m 28s | Max: 33m 18s | Hits:  88%/3765  
  🟩 rtx2080            Pass: 100%/39  | Total:  1d 19h | Avg:  1h 06m | Max:  1h 41m | Hits:  65%/47707 
  🟩 rtxa6000           Pass: 100%/8   | Total:  8h 05m | Avg:  1h 00m | Max:  3h 06m | Hits:  87%/10034 
🟩 jobs
  🟩 Build              Pass: 100%/42  | Total:  1d 22h | Avg:  1h 05m | Max:  1h 41m | Hits:  65%/51470 
  🟩 DeviceLaunch       Pass: 100%/1   | Total:  3h 06m | Avg:  3h 06m | Max:  3h 06m | Hits:  67%/1255  
  🟩 GraphCapture       Pass: 100%/1   | Total: 32m 13s | Avg: 32m 13s | Max: 32m 13s | Hits:  99%/1255  
  🟩 HostLaunch         Pass: 100%/3   | Total:  1h 39m | Avg: 33m 11s | Max: 38m 45s | Hits:  99%/3763  
  🟩 TestGPU            Pass: 100%/3   | Total:  1h 41m | Avg: 33m 47s | Max: 39m 02s | Hits:  99%/3763  
🟩 sm
  🟩 90                 Pass: 100%/3   | Total:  1h 31m | Avg: 30m 28s | Max: 33m 18s | Hits:  88%/3765  
  🟩 90;90a             Pass: 100%/2   | Total:  2h 14m | Avg:  1h 07m | Max:  1h 24m | Hits:  65%/2404  
  🟩 100;120            Pass: 100%/2   | Total:  1h 55m | Avg: 57m 34s | Max:  1h 09m | Hits:  64%/2404  
🟩 std
  🟩 17                 Pass: 100%/21  | Total:  1d 00h | Avg:  1h 09m | Max:  1h 41m | Hits:  65%/25726 
  🟩 20                 Pass: 100%/29  | Total:  1d 04h | Avg: 59m 12s | Max:  3h 06m | Hits:  73%/35780

🟩 thrust: Pass: 100%/50 | Total: 1d 09h | Avg: 39m 47s | Max: 1h 19m | Hits: 82%/95771

🟩 cmake_options
  🟩 -DTHRUST_DISPATCH_TYPE=Force32bit Pass: 100%/2   | Total: 49m 26s | Avg: 24m 43s | Max: 34m 53s | Hits:  90%/3834  
🟩 cpu
  🟩 amd64              Pass: 100%/48  | Total:  1d 07h | Avg: 39m 52s | Max:  1h 19m | Hits:  82%/91938 
  🟩 arm64              Pass: 100%/2   | Total:  1h 15m | Avg: 37m 47s | Max: 40m 53s | Hits:  80%/3833  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  3h 35m | Avg: 43m 08s | Max:  1h 07m | Hits:  79%/9575  
  🟩 12.9               Pass: 100%/45  | Total:  1d 05h | Avg: 39m 24s | Max:  1h 19m | Hits:  83%/86196 
🟩 cudacxx
  🟩 ClangCUDA19        Pass: 100%/2   | Total: 56m 05s | Avg: 28m 02s | Max: 30m 00s | Hits:  80%/3832  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  3h 35m | Avg: 43m 08s | Max:  1h 07m | Hits:  79%/9575  
  🟩 nvcc12.9           Pass: 100%/43  | Total:  1d 04h | Avg: 39m 56s | Max:  1h 19m | Hits:  83%/82364 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 56m 05s | Avg: 28m 02s | Max: 30m 00s | Hits:  80%/3832  
  🟩 nvcc               Pass: 100%/48  | Total:  1d 08h | Avg: 40m 16s | Max:  1h 19m | Hits:  82%/91939 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  2h 32m | Avg: 38m 13s | Max: 39m 09s | Hits:  80%/7664  
  🟩 Clang15            Pass: 100%/2   | Total:  1h 19m | Avg: 39m 46s | Max: 45m 39s | Hits:  80%/3832  
  🟩 Clang16            Pass: 100%/2   | Total:  1h 16m | Avg: 38m 18s | Max: 39m 23s | Hits:  80%/3832  
  🟩 Clang17            Pass: 100%/2   | Total:  1h 20m | Avg: 40m 06s | Max: 41m 31s | Hits:  80%/3832  
  🟩 Clang18            Pass: 100%/2   | Total:  1h 09m | Avg: 34m 52s | Max: 35m 30s | Hits:  80%/3832  
  🟩 Clang19            Pass: 100%/7   | Total:  3h 03m | Avg: 26m 16s | Max: 38m 25s | Hits:  86%/13412 
  🟩 GCC7               Pass: 100%/2   | Total:  1h 16m | Avg: 38m 03s | Max: 40m 40s | Hits:  80%/3834  
  🟩 GCC8               Pass: 100%/1   | Total: 46m 09s | Avg: 46m 09s | Max: 46m 09s | Hits:  80%/1917  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 21m | Avg: 40m 33s | Max: 44m 29s | Hits:  80%/3834  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 22m | Avg: 41m 18s | Max: 43m 53s | Hits:  80%/3834  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 19m | Avg: 39m 57s | Max: 40m 32s | Hits:  80%/3834  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 24m | Avg: 42m 27s | Max: 44m 33s | Hits:  80%/3834  
  🟩 GCC13              Pass: 100%/11  | Total:  4h 52m | Avg: 26m 35s | Max: 41m 38s | Hits:  87%/21087 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  2h 22m | Avg:  1h 11m | Max:  1h 14m | Hits:  76%/3818  
  🟩 MSVC14.43          Pass: 100%/5   | Total:  5h 09m | Avg:  1h 01m | Max:  1h 13m | Hits:  80%/9545  
  🟩 NVHPC25.5          Pass: 100%/2   | Total:  2h 31m | Avg:  1h 15m | Max:  1h 19m | Hits:  76%/3830  
🟩 cxx_family
  🟩 Clang              Pass: 100%/19  | Total: 10h 42m | Avg: 33m 50s | Max: 45m 39s | Hits:  82%/36404 
  🟩 GCC                Pass: 100%/22  | Total: 12h 23m | Avg: 33m 47s | Max: 46m 09s | Hits:  84%/42174 
  🟩 MSVC               Pass: 100%/7   | Total:  7h 31m | Avg:  1h 04m | Max:  1h 14m | Hits:  79%/13363 
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 31m | Avg:  1h 15m | Max:  1h 19m | Hits:  76%/3830  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 35m 31s | Avg: 17m 45s | Max: 20m 21s | Hits:  90%/3834  
  🟩 rtx2080            Pass: 100%/38  | Total:  1d 03h | Avg: 44m 01s | Max:  1h 19m | Hits:  79%/72786 
  🟩 rtx4090            Pass: 100%/10  | Total:  4h 40m | Avg: 28m 03s | Max:  1h 13m | Hits:  91%/19151 
🟩 jobs
  🟩 Build              Pass: 100%/43  | Total:  1d 07h | Avg: 43m 45s | Max:  1h 19m | Hits:  79%/82362 
  🟩 TestCPU            Pass: 100%/3   | Total: 54m 12s | Avg: 18m 04s | Max: 36m 55s | Hits:  99%/5742  
  🟩 TestGPU            Pass: 100%/4   | Total: 53m 37s | Avg: 13m 24s | Max: 15m 10s | Hits:  99%/7667  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 35m 31s | Avg: 17m 45s | Max: 20m 21s | Hits:  90%/3834  
  🟩 90;90a             Pass: 100%/2   | Total:  1h 37m | Avg: 48m 47s | Max:  1h 04m | Hits:  78%/3826  
  🟩 100;120            Pass: 100%/2   | Total:  1h 31m | Avg: 45m 33s | Max:  1h 00m | Hits:  78%/3826  
🟩 std
  🟩 17                 Pass: 100%/21  | Total: 15h 58m | Avg: 45m 39s | Max:  1h 14m | Hits:  79%/40223 
  🟩 20                 Pass: 100%/27  | Total: 16h 21m | Avg: 36m 20s | Max:  1h 19m | Hits:  84%/51714

🟩 libcudacxx: Pass: 100%/48 | Total: 15h 52m | Avg: 19m 50s | Max: 41m 24s | Hits: 72%/166985

🟩 cpu
  🟩 amd64              Pass: 100%/46  | Total: 15h 09m | Avg: 19m 46s | Max: 41m 24s | Hits:  73%/159518
  🟩 arm64              Pass: 100%/2   | Total: 42m 39s | Avg: 21m 19s | Max: 32m 20s | Hits:  60%/7467  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  1h 58m | Avg: 23m 37s | Max: 34m 26s | Hits:  50%/18302 
  🟩 12.9               Pass: 100%/43  | Total: 13h 54m | Avg: 19m 24s | Max: 41m 24s | Hits:  75%/148683
🟩 cudacxx
  🟩 ClangCUDA19        Pass: 100%/2   | Total: 58m 31s | Avg: 29m 15s | Max: 29m 46s | Hits:  29%/7433  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  1h 58m | Avg: 23m 37s | Max: 34m 26s | Hits:  50%/18302 
  🟩 nvcc12.9           Pass: 100%/41  | Total: 12h 55m | Avg: 18m 55s | Max: 41m 24s | Hits:  77%/141250
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 58m 31s | Avg: 29m 15s | Max: 29m 46s | Hits:  29%/7433  
  🟩 nvcc               Pass: 100%/46  | Total: 14h 53m | Avg: 19m 25s | Max: 41m 24s | Hits:  74%/159552
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  1h 22m | Avg: 20m 44s | Max: 28m 16s | Hits:  53%/14818 
  🟩 Clang15            Pass: 100%/2   | Total: 41m 00s | Avg: 20m 30s | Max: 28m 03s | Hits:  59%/7427  
  🟩 Clang16            Pass: 100%/2   | Total: 23m 58s | Avg: 11m 59s | Max: 12m 12s | Hits:  88%/7427  
  🟩 Clang17            Pass: 100%/2   | Total: 18m 14s | Avg:  9m 07s | Max: 12m 48s | Hits:  93%/7427  
  🟩 Clang18            Pass: 100%/2   | Total: 44m 01s | Avg: 22m 00s | Max: 31m 26s | Hits:  59%/7427  
  🟩 Clang19            Pass: 100%/6   | Total:  1h 56m | Avg: 19m 20s | Max: 29m 46s | Hits:  70%/22326 
  🟩 GCC7               Pass: 100%/2   | Total: 28m 53s | Avg: 14m 26s | Max: 23m 15s | Hits:  74%/7363  
  🟩 GCC8               Pass: 100%/1   | Total:  5m 14s | Avg:  5m 14s | Max:  5m 14s | Hits:  98%/3692  
  🟩 GCC9               Pass: 100%/2   | Total: 44m 18s | Avg: 22m 09s | Max: 33m 11s | Hits:  59%/7375  
  🟩 GCC10              Pass: 100%/2   | Total: 18m 24s | Avg:  9m 12s | Max: 13m 35s | Hits:  91%/7429  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 02m | Avg: 31m 13s | Max: 31m 57s | Hits:  31%/7425  
  🟩 GCC12              Pass: 100%/2   | Total: 18m 11s | Avg:  9m 05s | Max: 12m 11s | Hits:  93%/7429  
  🟩 GCC13              Pass: 100%/11  | Total:  3h 09m | Avg: 17m 12s | Max: 41m 24s | Hits:  86%/30207 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 12m | Avg: 36m 26s | Max: 38m 27s | Hits:  31%/7103  
  🟩 MSVC14.43          Pass: 100%/4   | Total:  2h 26m | Avg: 36m 33s | Max: 39m 22s | Hits:  73%/14697 
  🟩 NVHPC25.5          Pass: 100%/2   | Total: 40m 12s | Avg: 20m 06s | Max: 20m 58s | Hits:  85%/7413  
🟩 cxx_family
  🟩 Clang              Pass: 100%/18  | Total:  5h 26m | Avg: 18m 07s | Max: 31m 26s | Hits:  68%/66852 
  🟩 GCC                Pass: 100%/22  | Total:  6h 06m | Avg: 16m 40s | Max: 41m 24s | Hits:  78%/70920 
  🟩 MSVC               Pass: 100%/6   | Total:  3h 39m | Avg: 36m 31s | Max: 39m 22s | Hits:  59%/21800 
  🟩 NVHPC              Pass: 100%/2   | Total: 40m 12s | Avg: 20m 06s | Max: 20m 58s | Hits:  85%/7413  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 22m 35s | Avg: 11m 17s | Max: 17m 17s | Hits:  99%/7634  
  🟩 rtx2080            Pass: 100%/46  | Total: 15h 29m | Avg: 20m 12s | Max: 41m 24s | Hits:  71%/159351
🟩 jobs
  🟩 Build              Pass: 100%/42  | Total: 13h 38m | Avg: 19m 29s | Max: 39m 22s | Hits:  70%/155659
  🟩 NVRTC              Pass: 100%/2   | Total: 48m 50s | Avg: 24m 25s | Max: 24m 42s | Hits:  90%/42    
  🟩 Test               Pass: 100%/3   | Total:  1h 22m | Avg: 27m 38s | Max: 41m 24s | Hits:  95%/11284 
  🟩 VerifyCodegen      Pass: 100%/1   | Total:  1m 36s | Avg:  1m 36s | Max:  1m 36s
🟩 sm
  🟩 75                 Pass: 100%/2   | Total: 48m 50s | Avg: 24m 25s | Max: 24m 42s | Hits:  90%/42    
  🟩 90                 Pass: 100%/2   | Total: 22m 35s | Avg: 11m 17s | Max: 17m 17s | Hits:  99%/7634  
  🟩 90;90a             Pass: 100%/2   | Total: 51m 57s | Avg: 25m 58s | Max: 35m 31s | Hits:  86%/7585  
  🟩 100;120            Pass: 100%/2   | Total: 49m 26s | Avg: 24m 43s | Max: 35m 27s | Hits:  86%/7585  
🟩 std
  🟩 17                 Pass: 100%/22  | Total:  7h 18m | Avg: 19m 55s | Max: 38m 27s | Hits:  64%/77117 
  🟩 20                 Pass: 100%/25  | Total:  8h 32m | Avg: 20m 30s | Max: 41m 24s | Hits:  79%/89868

🟩 cudax: Pass: 100%/28 | Total: 3h 51m | Avg: 8m 16s | Max: 17m 45s | Hits: 89%/15126

🟩 cpu
  🟩 amd64              Pass: 100%/24  | Total:  3h 28m | Avg:  8m 42s | Max: 17m 45s | Hits:  89%/12794 
  🟩 arm64              Pass: 100%/4   | Total: 23m 01s | Avg:  5m 45s | Max:  6m 25s | Hits:  89%/2332  
🟩 ctk
  🟩 12.0               Pass: 100%/3   | Total: 28m 10s | Avg:  9m 23s | Max: 17m 45s | Hits:  87%/1448  
  🟩 12.9               Pass: 100%/25  | Total:  3h 23m | Avg:  8m 08s | Max: 17m 38s | Hits:  89%/13678 
🟩 cudacxx
  🟩 nvcc12.0           Pass: 100%/3   | Total: 28m 10s | Avg:  9m 23s | Max: 17m 45s | Hits:  87%/1448  
  🟩 nvcc12.9           Pass: 100%/25  | Total:  3h 23m | Avg:  8m 08s | Max: 17m 38s | Hits:  89%/13678 
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/28  | Total:  3h 51m | Avg:  8m 16s | Max: 17m 45s | Hits:  89%/15126 
🟩 cxx
  🟩 Clang14            Pass: 100%/2   | Total:  9m 54s | Avg:  4m 57s | Max:  5m 15s | Hits:  90%/1168  
  🟩 Clang15            Pass: 100%/1   | Total:  6m 21s | Avg:  6m 21s | Max:  6m 21s | Hits:  89%/583   
  🟩 Clang16            Pass: 100%/1   | Total:  6m 21s | Avg:  6m 21s | Max:  6m 21s | Hits:  89%/583   
  🟩 Clang17            Pass: 100%/1   | Total:  5m 28s | Avg:  5m 28s | Max:  5m 28s | Hits:  89%/583   
  🟩 Clang18            Pass: 100%/1   | Total:  5m 56s | Avg:  5m 56s | Max:  5m 56s | Hits:  89%/583   
  🟩 Clang19            Pass: 100%/4   | Total: 24m 46s | Avg:  6m 11s | Max:  8m 39s | Hits:  92%/2332  
  🟩 GCC10              Pass: 100%/2   | Total: 12m 18s | Avg:  6m 09s | Max:  6m 32s | Hits:  89%/1168  
  🟩 GCC11              Pass: 100%/1   | Total:  6m 20s | Avg:  6m 20s | Max:  6m 20s | Hits:  89%/583   
  🟩 GCC12              Pass: 100%/1   | Total:  7m 11s | Avg:  7m 11s | Max:  7m 11s | Hits:  89%/583   
  🟩 GCC13              Pass: 100%/8   | Total: 55m 38s | Avg:  6m 57s | Max: 12m 31s | Hits:  92%/4664  
  🟩 MSVC14.39          Pass: 100%/1   | Total: 17m 45s | Avg: 17m 45s | Max: 17m 45s | Hits:  76%/282   
  🟩 MSVC14.43          Pass: 100%/3   | Total: 51m 50s | Avg: 17m 16s | Max: 17m 38s | Hits:  76%/852   
  🟩 NVHPC25.5          Pass: 100%/2   | Total: 22m 06s | Avg: 11m 03s | Max: 11m 10s | Hits:  87%/1162  
🟩 cxx_family
  🟩 Clang              Pass: 100%/10  | Total: 58m 46s | Avg:  5m 52s | Max:  8m 39s | Hits:  90%/5832  
  🟩 GCC                Pass: 100%/12  | Total:  1h 21m | Avg:  6m 47s | Max: 12m 31s | Hits:  91%/6998  
  🟩 MSVC               Pass: 100%/4   | Total:  1h 09m | Avg: 17m 23s | Max: 17m 45s | Hits:  76%/1134  
  🟩 NVHPC              Pass: 100%/2   | Total: 22m 06s | Avg: 11m 03s | Max: 11m 10s | Hits:  87%/1162  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 11m 33s | Avg:  5m 46s | Max:  6m 36s | Hits:  94%/1166  
  🟩 rtx2080            Pass: 100%/26  | Total:  3h 40m | Avg:  8m 28s | Max: 17m 45s | Hits:  89%/13960 
🟩 jobs
  🟩 Build              Pass: 100%/25  | Total:  3h 24m | Avg:  8m 09s | Max: 17m 45s | Hits:  88%/13377 
  🟩 Test               Pass: 100%/3   | Total: 27m 46s | Avg:  9m 15s | Max: 12m 31s | Hits:  99%/1749  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 11m 33s | Avg:  5m 46s | Max:  6m 36s | Hits:  94%/1166  
  🟩 90;90a             Pass: 100%/2   | Total: 22m 48s | Avg: 11m 24s | Max: 16m 58s | Hits:  85%/867   
  🟩 100;120            Pass: 100%/2   | Total: 23m 37s | Avg: 11m 48s | Max: 17m 14s | Hits:  85%/867   
🟩 std
  🟩 17                 Pass: 100%/3   | Total: 22m 04s | Avg:  7m 21s | Max: 10m 56s | Hits:  89%/1747  
  🟩 20                 Pass: 100%/25  | Total:  3h 29m | Avg:  8m 23s | Max: 17m 45s | Hits:  89%/13379

🟩 python: Pass: 100%/18 | Total: 3h 06m | Avg: 10m 22s | Max: 20m 29s

🟩 cpu
  🟩 amd64              Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 ctk
  🟩 12.9               Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 cxx
  🟩 GCC13              Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 cxx_family
  🟩 GCC                Pass: 100%/18  | Total:  3h 06m | Avg: 10m 22s | Max: 20m 29s
🟩 gpu
  🟩 h100               Pass: 100%/8   | Total:  1h 16m | Avg:  9m 35s | Max: 15m 38s
  🟩 rtxa6000           Pass: 100%/10  | Total:  1h 50m | Avg: 11m 00s | Max: 20m 29s
🟩 jobs
  🟩 Build cuda.cccl    Pass: 100%/2   | Total: 17m 01s | Avg:  8m 30s | Max:  8m 44s
  🟩 Test cuda.cccl.cooperative Pass: 100%/4   | Total:  1h 06m | Avg: 16m 30s | Max: 20m 29s
  🟩 Test cuda.cccl.examples Pass: 100%/4   | Total: 19m 00s | Avg:  4m 45s | Max:  4m 58s
  🟩 Test cuda.cccl.headers Pass: 100%/4   | Total: 20m 18s | Avg:  5m 04s | Max:  6m 11s
  🟩 Test cuda.cccl.parallel Pass: 100%/4   | Total:  1h 04m | Avg: 16m 07s | Max: 17m 52s
🟩 py_version
  🟩 3.10               Pass: 100%/9   | Total:  1h 28m | Avg:  9m 51s | Max: 19m 22s
  🟩 3.13               Pass: 100%/9   | Total:  1h 38m | Avg: 10m 54s | Max: 20m 29s

🟩 packaging: Pass: 100%/4 | Total: 18m 52s | Avg: 4m 43s | Max: 5m 57s

🟩 cpu
  🟩 amd64              Pass: 100%/4   | Total: 18m 52s | Avg:  4m 43s | Max:  5m 57s
🟩 ctk
  🟩 12.0               Pass: 100%/2   | Total:  8m 19s | Avg:  4m 09s | Max:  4m 15s
  🟩 12.9               Pass: 100%/2   | Total: 10m 33s | Avg:  5m 16s | Max:  5m 57s
🟩 cudacxx
  🟩 nvcc12.0           Pass: 100%/2   | Total:  8m 19s | Avg:  4m 09s | Max:  4m 15s
  🟩 nvcc12.9           Pass: 100%/2   | Total: 10m 33s | Avg:  5m 16s | Max:  5m 57s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 18m 52s | Avg:  4m 43s | Max:  5m 57s
🟩 cxx
  🟩 Clang14            Pass: 100%/1   | Total:  4m 15s | Avg:  4m 15s | Max:  4m 15s
  🟩 Clang19            Pass: 100%/1   | Total:  4m 36s | Avg:  4m 36s | Max:  4m 36s
  🟩 GCC12              Pass: 100%/1   | Total:  4m 04s | Avg:  4m 04s | Max:  4m 04s
  🟩 GCC13              Pass: 100%/1   | Total:  5m 57s | Avg:  5m 57s | Max:  5m 57s
🟩 cxx_family
  🟩 Clang              Pass: 100%/2   | Total:  8m 51s | Avg:  4m 25s | Max:  4m 36s
  🟩 GCC                Pass: 100%/2   | Total: 10m 01s | Avg:  5m 00s | Max:  5m 57s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 18m 52s | Avg:  4m 43s | Max:  5m 57s
🟩 jobs
  🟩 Test               Pass: 100%/4   | Total: 18m 52s | Avg:  4m 43s | Max:  5m 57s

🟩 stdpar: Pass: 100%/4 | Total: 18m 02s | Avg: 4m 30s | Max: 4m 50s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total:  9m 27s | Avg:  4m 43s | Max:  4m 50s
  🟩 arm64              Pass: 100%/2   | Total:  8m 35s | Avg:  4m 17s | Max:  4m 30s
🟩 ctk
  🟩 12.9               Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 cxx
  🟩 NVHPC25.5          Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 18m 02s | Avg:  4m 30s | Max:  4m 50s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  8m 42s | Avg:  4m 21s | Max:  4m 37s
  🟩 20                 Pass: 100%/2   | Total:  9m 20s | Avg:  4m 40s | Max:  4m 50s

🟩 cccl_c_parallel: Pass: 100%/3 | Total: 25m 54s | Avg: 8m 38s | Max: 11m 46s | Hits: 98%/495

🟩 cpu
  🟩 amd64              Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 ctk
  🟩 12.9               Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 cudacxx
  🟩 nvcc12.9           Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 cxx
  🟩 GCC13              Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 cxx_family
  🟩 GCC                Pass: 100%/3   | Total: 25m 54s | Avg:  8m 38s | Max: 11m 46s | Hits:  98%/495   
🟩 gpu
  🟩 h100               Pass: 100%/1   | Total: 11m 08s | Avg: 11m 08s | Max: 11m 08s | Hits:  98%/165   
  🟩 rtx2080            Pass: 100%/2   | Total: 14m 46s | Avg:  7m 23s | Max: 11m 46s | Hits:  97%/330   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  3m 00s | Avg:  3m 00s | Max:  3m 00s | Hits:  96%/165   
  🟩 Test               Pass: 100%/2   | Total: 22m 54s | Avg: 11m 27s | Max: 11m 46s | Hits:  98%/330

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
	CCCL Packaging
+/-	libcu++
+/-	CUB
+/-	Thrust
	CUDA Experimental
	stdpar
	python
	CCCL C Parallel Library
	Catch2Helper

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
+/-	CCCL Packaging
+/-	libcu++
+/-	CUB
+/-	Thrust
+/-	CUDA Experimental
+/-	stdpar
+/-	python
+/-	CCCL C Parallel Library
+/-	Catch2Helper

🏃‍ Runner counts (total jobs: 205)

#	Runner
128	`linux-amd64-cpu16`
23	`windows-amd64-cpu16`
14	`linux-amd64-gpu-h100-latest-1`
14	`linux-amd64-gpu-rtxa6000-latest-1`
12	`linux-arm64-cpu16`
11	`linux-amd64-gpu-rtx2080-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`

miscco requested review from a team as code owners October 13, 2025 13:11

miscco requested a review from ericniebler October 13, 2025 13:11

github-project-automation bot added this to CCCL Oct 13, 2025

miscco requested review from NaderAlAwar and elstehle October 13, 2025 13:11

github-project-automation bot moved this to Todo in CCCL Oct 13, 2025

cccl-authenticator-app bot moved this from Todo to In Review in CCCL Oct 13, 2025

bernhardmgruber approved these changes Oct 13, 2025

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elstehle approved these changes Oct 13, 2025

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miscco added 2 commits October 13, 2025 16:14

Merge branch 'branch/3.1.x' into backport_6099

30de744

Fix formatting

22e28c0

fbusato requested changes Oct 13, 2025

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github-project-automation bot moved this from In Review to In Progress in CCCL Oct 13, 2025

fbusato approved these changes Oct 13, 2025

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github-project-automation bot moved this from In Progress to In Review in CCCL Oct 13, 2025

Merge branch 'branch/3.1.x' into backport_6099

bbcc334

wmaxey merged commit 30ae2ac into NVIDIA:branch/3.1.x Oct 14, 2025
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github-project-automation bot moved this from In Review to Done in CCCL Oct 14, 2025

		#include <cuda/std/__algorithm/clamp.h>
		#include <cuda/std/__bit/has_single_bit.h>

[Backport 3.1]: [CUB] Replace several direct uses of __clz (#6099) #6202

[Backport 3.1]: [CUB] Replace several direct uses of __clz (#6099) #6202

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miscco commented Oct 13, 2025

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bernhardmgruber commented Oct 13, 2025

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github-actions bot commented Oct 13, 2025

🟨 cub: Pass: 98%/50 | Total: 1d 14h | Avg: 45m 38s | Max: 1h 39m | Hits: 83%/60253

🟩 thrust: Pass: 100%/50 | Total: 19h 17m | Avg: 23m 08s | Max: 1h 18m | Hits: 93%/95771

🟩 libcudacxx: Pass: 100%/48 | Total: 21h 50m | Avg: 27m 18s | Max: 1h 57m | Hits: 59%/166985

🟩 cudax: Pass: 100%/28 | Total: 2h 55m | Avg: 6m 16s | Max: 16m 14s | Hits: 98%/15126

🟩 python: Pass: 100%/18 | Total: 2h 59m | Avg: 9m 59s | Max: 20m 44s

🟩 packaging: Pass: 100%/4 | Total: 19m 16s | Avg: 4m 49s | Max: 6m 58s

🟩 stdpar: Pass: 100%/4 | Total: 15m 31s | Avg: 3m 52s | Max: 3m 57s

🟩 cccl_c_parallel: Pass: 100%/3 | Total: 23m 54s | Avg: 7m 58s | Max: 10m 59s | Hits: 98%/495

👃 Inspect Changes

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🏃‍ Runner counts (total jobs: 205)

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fbusato Oct 13, 2025

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fbusato Oct 13, 2025

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fbusato Oct 13, 2025

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miscco Oct 13, 2025

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wmaxey commented Oct 13, 2025

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github-actions bot commented Oct 14, 2025

🟩 cub: Pass: 100%/50 | Total: 2d 05h | Avg: 1h 03m | Max: 3h 06m | Hits: 70%/61506

🟩 thrust: Pass: 100%/50 | Total: 1d 09h | Avg: 39m 47s | Max: 1h 19m | Hits: 82%/95771

🟩 libcudacxx: Pass: 100%/48 | Total: 15h 52m | Avg: 19m 50s | Max: 41m 24s | Hits: 72%/166985

🟩 cudax: Pass: 100%/28 | Total: 3h 51m | Avg: 8m 16s | Max: 17m 45s | Hits: 89%/15126

🟩 python: Pass: 100%/18 | Total: 3h 06m | Avg: 10m 22s | Max: 20m 29s

🟩 packaging: Pass: 100%/4 | Total: 18m 52s | Avg: 4m 43s | Max: 5m 57s

🟩 stdpar: Pass: 100%/4 | Total: 18m 02s | Avg: 4m 30s | Max: 4m 50s

🟩 cccl_c_parallel: Pass: 100%/3 | Total: 25m 54s | Avg: 8m 38s | Max: 11m 46s | Hits: 98%/495

👃 Inspect Changes

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Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 205)

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[Backport 3.1]: [CUB] Replace several direct uses of `__clz` (#6099) #6202

[Backport 3.1]: [CUB] Replace several direct uses of `__clz` (#6099) #6202