Backport to 3.0: Fix grid dependency sync in cub::DeviceMergeSort (#5456) #5461

bernhardmgruber · 2025-08-07T18:47:16Z

The sync was too late and did not guard loading from merge_partitions, leading to a data race

github-actions · 2025-08-07T23:33:31Z

🟨 CI finished in 4h 44m: Pass: 98%/103 | Total: 3d 06h | Avg: 45m 30s | Max: 1h 28m | Hits: 76%/141876

🟨 cub: Pass: 97%/48 | Total: 2d 02h | Avg: 1h 02m | Max: 1h 28m | Hits: 66%/55944

🔍 cpu: amd64 🔍
  🔍 amd64              Pass:  97%/46  | Total:  1d 23h | Avg:  1h 02m | Max:  1h 28m | Hits:  66%/53496 
  🟩 arm64              Pass: 100%/2   | Total:  2h 14m | Avg:  1h 07m | Max:  1h 09m | Hits:  55%/2448  
🔍 ctk: 12.8 🔍
  🟩 12.0               Pass: 100%/5   | Total:  5h 48m | Avg:  1h 09m | Max:  1h 12m | Hits:  66%/5949  
  🟩 12.6               Pass: 100%/2   | Total:  2h 47m | Avg:  1h 23m | Max:  1h 28m | Hits:  65%/2254  
  🔍 12.8               Pass:  97%/41  | Total:  1d 17h | Avg:  1h 00m | Max:  1h 28m | Hits:  66%/47741 
🔍 cudacxx: nvcc12.8 🔍
  🟩 ClangCUDA18        Pass: 100%/2   | Total:  2h 17m | Avg:  1h 08m | Max:  1h 11m | Hits:  67%/2110  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  5h 48m | Avg:  1h 09m | Max:  1h 12m | Hits:  66%/5949  
  🟩 nvcc12.6           Pass: 100%/2   | Total:  2h 47m | Avg:  1h 23m | Max:  1h 28m | Hits:  65%/2254  
  🔍 nvcc12.8           Pass:  97%/39  | Total:  1d 15h | Avg:  1h 00m | Max:  1h 28m | Hits:  66%/45631 
🔍 cudacxx_family: nvcc 🔍
  🟩 ClangCUDA          Pass: 100%/2   | Total:  2h 17m | Avg:  1h 08m | Max:  1h 11m | Hits:  67%/2110  
  🔍 nvcc               Pass:  97%/46  | Total:  1d 23h | Avg:  1h 02m | Max:  1h 28m | Hits:  66%/53834 
🔍 cxx: Clang18 🔍
  🟩 Clang14            Pass: 100%/4   | Total:  4h 28m | Avg:  1h 07m | Max:  1h 09m | Hits:  60%/4904  
  🟩 Clang15            Pass: 100%/2   | Total:  2h 07m | Avg:  1h 03m | Max:  1h 05m | Hits:  55%/2448  
  🟩 Clang16            Pass: 100%/2   | Total:  2h 08m | Avg:  1h 04m | Max:  1h 04m | Hits:  55%/2448  
  🟩 Clang17            Pass: 100%/2   | Total:  2h 06m | Avg:  1h 03m | Max:  1h 06m | Hits:  55%/2448  
  🔍 Clang18            Pass:  85%/7   | Total:  6h 37m | Avg: 56m 49s | Max:  1h 12m | Hits:  68%/7006  
  🟩 GCC7               Pass: 100%/2   | Total:  2h 15m | Avg:  1h 07m | Max:  1h 09m | Hits:  63%/2452  
  🟩 GCC8               Pass: 100%/1   | Total:  1h 07m | Avg:  1h 07m | Max:  1h 07m | Hits:  55%/1226  
  🟩 GCC9               Pass: 100%/2   | Total:  2h 21m | Avg:  1h 10m | Max:  1h 13m | Hits:  60%/2452  
  🟩 GCC10              Pass: 100%/2   | Total:  2h 15m | Avg:  1h 07m | Max:  1h 11m | Hits:  55%/2452  
  🟩 GCC11              Pass: 100%/2   | Total:  2h 18m | Avg:  1h 09m | Max:  1h 10m | Hits:  55%/2448  
  🟩 GCC12              Pass: 100%/2   | Total:  2h 08m | Avg:  1h 04m | Max:  1h 05m | Hits:  55%/2448  
  🟩 GCC13              Pass: 100%/12  | Total:  9h 42m | Avg: 48m 31s | Max:  1h 12m | Hits:  77%/14688 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  2h 40m | Avg:  1h 20m | Max:  1h 28m | Hits:  71%/2090  
  🟩 MSVC14.42          Pass: 100%/4   | Total:  5h 03m | Avg:  1h 15m | Max:  1h 25m | Hits:  71%/4180  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  2h 47m | Avg:  1h 23m | Max:  1h 28m | Hits:  65%/2254  
🔍 cxx_family: Clang 🔍
  🔍 Clang              Pass:  94%/17  | Total: 17h 29m | Avg:  1h 01m | Max:  1h 12m | Hits:  61%/19254 
  🟩 GCC                Pass: 100%/23  | Total: 22h 09m | Avg: 57m 48s | Max:  1h 13m | Hits:  68%/28166 
  🟩 MSVC               Pass: 100%/6   | Total:  7h 43m | Avg:  1h 17m | Max:  1h 28m | Hits:  71%/6270  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 47m | Avg:  1h 23m | Max:  1h 28m | Hits:  65%/2254  
🔍 gpu: rtxa6000 🔍
  🟩 h100               Pass: 100%/3   | Total:  1h 58m | Avg: 39m 24s | Max: 57m 12s | Hits:  77%/3672  
  🟩 rtx2080            Pass: 100%/37  | Total:  1d 18h | Avg:  1h 09m | Max:  1h 28m | Hits:  60%/43704 
  🔍 rtxa6000           Pass:  87%/8   | Total:  5h 28m | Avg: 41m 03s | Max:  1h 10m | Hits:  88%/8568  
🔍 jobs: TestGPU 🔍
  🟩 Build              Pass: 100%/40  | Total:  1d 21h | Avg:  1h 08m | Max:  1h 28m | Hits:  60%/47376 
  🟩 DeviceLaunch       Pass: 100%/1   | Total: 29m 14s | Avg: 29m 14s | Max: 29m 14s | Hits:  99%/1224  
  🟩 GraphCapture       Pass: 100%/1   | Total: 32m 30s | Avg: 32m 30s | Max: 32m 30s | Hits:  99%/1224  
  🟩 HostLaunch         Pass: 100%/3   | Total:  1h 43m | Avg: 34m 22s | Max: 40m 29s | Hits:  99%/3672  
  🔍 TestGPU            Pass:  66%/3   | Total:  1h 52m | Avg: 37m 33s | Max: 57m 12s | Hits:  84%/2448  
🔍 std: 20 🔍
  🟩 17                 Pass: 100%/20  | Total: 23h 45m | Avg:  1h 11m | Max:  1h 28m | Hits:  60%/23693 
  🔍 20                 Pass:  96%/28  | Total:  1d 02h | Avg: 56m 35s | Max:  1h 22m | Hits:  70%/32251 
🟩 sm
  🟩 90                 Pass: 100%/3   | Total:  1h 58m | Avg: 39m 24s | Max: 57m 12s | Hits:  77%/3672  
  🟩 90;90a             Pass: 100%/2   | Total:  1h 58m | Avg: 59m 01s | Max:  1h 08m | Hits:  63%/2269  
  🟩 100;120            Pass: 100%/2   | Total:  2h 14m | Avg:  1h 07m | Max:  1h 07m | Hits:  68%/2269

🟥 python: Pass: 0%/1 | Total: 6m 24s | Avg: 6m 24s | Max: 6m 24s

🟥 cpu
  🟥 amd64              Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 ctk
  🟥 12.8               Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 cudacxx
  🟥 nvcc12.8           Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 cudacxx_family
  🟥 nvcc               Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 cxx
  🟥 GCC13              Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 cxx_family
  🟥 GCC                Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 gpu
  🟥 rtx2080            Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s
🟥 jobs
  🟥 Test               Pass:   0%/1   | Total:  6m 24s | Avg:  6m 24s | Max:  6m 24s

🟩 thrust: Pass: 100%/48 | Total: 1d 02h | Avg: 33m 26s | Max: 59m 40s | Hits: 84%/85612

🟩 cmake_options
  🟩 -DTHRUST_DISPATCH_TYPE=Force32bit Pass: 100%/2   | Total: 40m 06s | Avg: 20m 03s | Max: 26m 04s | Hits:  91%/3570  
🟩 cpu
  🟩 amd64              Pass: 100%/46  | Total:  1d 01h | Avg: 33m 34s | Max: 59m 40s | Hits:  84%/82043 
  🟩 arm64              Pass: 100%/2   | Total:  1h 01m | Avg: 30m 41s | Max: 32m 35s | Hits:  82%/3569  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  3h 08m | Avg: 37m 42s | Max: 57m 34s | Hits:  82%/8916  
  🟩 12.6               Pass: 100%/2   | Total:  1h 54m | Avg: 57m 17s | Max: 57m 53s | Hits:  80%/3568  
  🟩 12.8               Pass: 100%/41  | Total: 21h 42m | Avg: 31m 46s | Max: 59m 40s | Hits:  84%/73128 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total: 51m 29s | Avg: 25m 44s | Max: 26m 40s | Hits:  82%/3568  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  3h 08m | Avg: 37m 42s | Max: 57m 34s | Hits:  82%/8916  
  🟩 nvcc12.6           Pass: 100%/2   | Total:  1h 54m | Avg: 57m 17s | Max: 57m 53s | Hits:  80%/3568  
  🟩 nvcc12.8           Pass: 100%/39  | Total: 20h 50m | Avg: 32m 04s | Max: 59m 40s | Hits:  84%/69560 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 51m 29s | Avg: 25m 44s | Max: 26m 40s | Hits:  82%/3568  
  🟩 nvcc               Pass: 100%/46  | Total:  1d 01h | Avg: 33m 47s | Max: 59m 40s | Hits:  84%/82044 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  2h 04m | Avg: 31m 11s | Max: 32m 20s | Hits:  82%/7136  
  🟩 Clang15            Pass: 100%/2   | Total:  1h 08m | Avg: 34m 00s | Max: 35m 41s | Hits:  82%/3568  
  🟩 Clang16            Pass: 100%/2   | Total:  1h 05m | Avg: 32m 42s | Max: 34m 53s | Hits:  82%/3568  
  🟩 Clang17            Pass: 100%/2   | Total:  1h 09m | Avg: 34m 30s | Max: 34m 54s | Hits:  82%/3568  
  🟩 Clang18            Pass: 100%/7   | Total:  2h 44m | Avg: 23m 28s | Max: 33m 28s | Hits:  87%/12488 
  🟩 GCC7               Pass: 100%/2   | Total:  1h 09m | Avg: 34m 56s | Max: 35m 28s | Hits:  82%/3570  
  🟩 GCC8               Pass: 100%/1   | Total: 32m 10s | Avg: 32m 10s | Max: 32m 10s | Hits:  82%/1785  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 11m | Avg: 35m 55s | Max: 36m 41s | Hits:  82%/3570  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 10m | Avg: 35m 00s | Max: 35m 03s | Hits:  82%/3570  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 02m | Avg: 31m 18s | Max: 31m 26s | Hits:  82%/3570  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 11m | Avg: 35m 40s | Max: 36m 34s | Hits:  82%/3570  
  🟩 GCC13              Pass: 100%/11  | Total:  4h 28m | Avg: 24m 22s | Max: 41m 33s | Hits:  85%/19635 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 55m | Avg: 57m 41s | Max: 57m 48s | Hits:  80%/3556  
  🟩 MSVC14.42          Pass: 100%/5   | Total:  3h 58m | Avg: 47m 38s | Max: 59m 40s | Hits:  84%/8890  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  1h 54m | Avg: 57m 17s | Max: 57m 53s | Hits:  80%/3568  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total:  8h 11m | Avg: 28m 54s | Max: 35m 41s | Hits:  84%/30328 
  🟩 GCC                Pass: 100%/22  | Total: 10h 46m | Avg: 29m 21s | Max: 41m 33s | Hits:  84%/39270 
  🟩 MSVC               Pass: 100%/7   | Total:  5h 53m | Avg: 50m 30s | Max: 59m 40s | Hits:  83%/12446 
  🟩 NVHPC              Pass: 100%/2   | Total:  1h 54m | Avg: 57m 17s | Max: 57m 53s | Hits:  80%/3568  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 35m 40s | Avg: 17m 50s | Max: 20m 42s | Hits:  91%/3570  
  🟩 rtx2080            Pass: 100%/36  | Total: 22h 09m | Avg: 36m 56s | Max: 57m 53s | Hits:  81%/64209 
  🟩 rtx4090            Pass: 100%/10  | Total:  4h 00m | Avg: 24m 00s | Max: 59m 40s | Hits:  92%/17833 
🟩 jobs
  🟩 Build              Pass: 100%/41  | Total:  1d 01h | Avg: 36m 38s | Max: 59m 40s | Hits:  81%/73126 
  🟩 TestCPU            Pass: 100%/3   | Total: 48m 26s | Avg: 16m 08s | Max: 31m 58s | Hits:  99%/5347  
  🟩 TestGPU            Pass: 100%/4   | Total: 54m 41s | Avg: 13m 40s | Max: 14m 58s | Hits:  99%/7139  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 35m 40s | Avg: 17m 50s | Max: 20m 42s | Hits:  91%/3570  
  🟩 90;90a             Pass: 100%/2   | Total:  1h 14m | Avg: 37m 08s | Max: 43m 47s | Hits:  81%/3563  
  🟩 100;120            Pass: 100%/2   | Total:  1h 17m | Avg: 38m 52s | Max: 47m 48s | Hits:  81%/3563  
🟩 std
  🟩 17                 Pass: 100%/20  | Total: 12h 52m | Avg: 38m 36s | Max: 57m 48s | Hits:  80%/35671 
  🟩 20                 Pass: 100%/26  | Total: 13h 13m | Avg: 30m 30s | Max: 59m 40s | Hits:  86%/46371

🟩 stdpar: Pass: 100%/4 | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 24m 14s | Avg: 12m 07s | Max: 13m 57s
  🟩 arm64              Pass: 100%/2   | Total: 19m 57s | Avg:  9m 58s | Max: 12m 46s
🟩 ctk
  🟩 12.6               Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 cxx
  🟩 NVHPC25.1          Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s
🟩 std
  🟩 17                 Pass: 100%/2   | Total: 26m 43s | Avg: 13m 21s | Max: 13m 57s
  🟩 20                 Pass: 100%/2   | Total: 17m 28s | Avg:  8m 44s | Max: 10m 17s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits: 65%/320

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits:  65%/320   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  4m 02s | Avg:  4m 02s | Max:  4m 02s | Hits:  31%/160   
  🟩 Test               Pass: 100%/1   | Total: 17m 54s | Avg: 17m 54s | Max: 17m 54s | Hits:  98%/160

👃 Inspect Changes

Modifications in project?

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

Modifications in project or dependencies?

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

🏃‍ Runner counts (total jobs: 103)

#	Runner
70	`linux-amd64-cpu16`
13	`windows-amd64-cpu16`
6	`linux-arm64-cpu16`
6	`linux-amd64-gpu-rtxa6000-latest-1`
3	`linux-amd64-gpu-h100-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`
2	`linux-amd64-gpu-rtx2080-latest-1`

bernhardmgruber · 2025-08-08T20:52:06Z

/ok to test e975e16

github-actions · 2025-08-08T23:39:22Z

🟩 CI finished in 2h 44m: Pass: 100%/103 | Total: 22h 41m | Avg: 13m 12s | Max: 2h 06m | Hits: 99%/143100

🟩 cub: Pass: 100%/48 | Total: 12h 45m | Avg: 15m 56s | Max: 2h 06m | Hits: 98%/57168

🟩 cpu
  🟩 amd64              Pass: 100%/46  | Total: 12h 32m | Avg: 16m 21s | Max:  2h 06m | Hits:  98%/54720 
  🟩 arm64              Pass: 100%/2   | Total: 12m 25s | Avg:  6m 12s | Max:  6m 40s | Hits:  99%/2448  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  1h 45m | Avg: 21m 02s | Max:  1h 04m | Hits:  93%/5949  
  🟩 12.6               Pass: 100%/2   | Total: 24m 49s | Avg: 12m 24s | Max: 12m 46s | Hits:  98%/2254  
  🟩 12.8               Pass: 100%/41  | Total: 10h 34m | Avg: 15m 29s | Max:  2h 06m | Hits:  98%/48965 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total: 10m 21s | Avg:  5m 10s | Max:  5m 18s | Hits: 100%/2110  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  1h 45m | Avg: 21m 02s | Max:  1h 04m | Hits:  93%/5949  
  🟩 nvcc12.6           Pass: 100%/2   | Total: 24m 49s | Avg: 12m 24s | Max: 12m 46s | Hits:  98%/2254  
  🟩 nvcc12.8           Pass: 100%/39  | Total: 10h 24m | Avg: 16m 00s | Max:  2h 06m | Hits:  98%/46855 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 10m 21s | Avg:  5m 10s | Max:  5m 18s | Hits: 100%/2110  
  🟩 nvcc               Pass: 100%/46  | Total: 12h 34m | Avg: 16m 24s | Max:  2h 06m | Hits:  98%/55058 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total: 27m 29s | Avg:  6m 52s | Max:  7m 54s | Hits:  99%/4904  
  🟩 Clang15            Pass: 100%/2   | Total: 13m 39s | Avg:  6m 49s | Max:  7m 04s | Hits: 100%/2448  
  🟩 Clang16            Pass: 100%/2   | Total: 14m 06s | Avg:  7m 03s | Max:  7m 10s | Hits: 100%/2448  
  🟩 Clang17            Pass: 100%/2   | Total: 13m 10s | Avg:  6m 35s | Max:  6m 36s | Hits: 100%/2448  
  🟩 Clang18            Pass: 100%/7   | Total:  1h 29m | Avg: 12m 46s | Max: 30m 30s | Hits: 100%/8230  
  🟩 GCC7               Pass: 100%/2   | Total:  1h 11m | Avg: 35m 39s | Max:  1h 04m | Hits:  84%/2452  
  🟩 GCC8               Pass: 100%/1   | Total:  6m 56s | Avg:  6m 56s | Max:  6m 56s | Hits:  99%/1226  
  🟩 GCC9               Pass: 100%/2   | Total: 13m 55s | Avg:  6m 57s | Max:  7m 35s | Hits:  99%/2452  
  🟩 GCC10              Pass: 100%/2   | Total: 13m 50s | Avg:  6m 55s | Max:  6m 58s | Hits:  99%/2452  
  🟩 GCC11              Pass: 100%/2   | Total: 14m 20s | Avg:  7m 10s | Max:  7m 20s | Hits:  99%/2448  
  🟩 GCC12              Pass: 100%/2   | Total: 14m 47s | Avg:  7m 23s | Max:  7m 28s | Hits:  99%/2448  
  🟩 GCC13              Pass: 100%/12  | Total:  5h 17m | Avg: 26m 27s | Max:  2h 06m | Hits:  97%/14688 
  🟩 MSVC14.29          Pass: 100%/2   | Total: 43m 03s | Avg: 21m 31s | Max: 22m 26s | Hits:  99%/2090  
  🟩 MSVC14.42          Pass: 100%/4   | Total:  1h 26m | Avg: 21m 41s | Max: 22m 25s | Hits:  99%/4180  
  🟩 NVHPC25.1          Pass: 100%/2   | Total: 24m 49s | Avg: 12m 24s | Max: 12m 46s | Hits:  98%/2254  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total:  2h 37m | Avg:  9m 16s | Max: 30m 30s | Hits:  99%/20478 
  🟩 GCC                Pass: 100%/23  | Total:  7h 32m | Avg: 19m 40s | Max:  2h 06m | Hits:  97%/28166 
  🟩 MSVC               Pass: 100%/6   | Total:  2h 09m | Avg: 21m 38s | Max: 22m 26s | Hits:  99%/6270  
  🟩 NVHPC              Pass: 100%/2   | Total: 24m 49s | Avg: 12m 24s | Max: 12m 46s | Hits:  98%/2254  
🟩 gpu
  🟩 h100               Pass: 100%/3   | Total:  1h 01m | Avg: 20m 31s | Max: 29m 13s | Hits:  99%/3672  
  🟩 rtx2080            Pass: 100%/37  | Total:  6h 48m | Avg: 11m 01s | Max:  1h 04m | Hits:  98%/43704 
  🟩 rtxa6000           Pass: 100%/8   | Total:  4h 55m | Avg: 36m 56s | Max:  2h 06m | Hits:  95%/9792  
🟩 jobs
  🟩 Build              Pass: 100%/40  | Total:  7h 08m | Avg: 10m 42s | Max:  1h 04m | Hits:  98%/47376 
  🟩 DeviceLaunch       Pass: 100%/1   | Total: 28m 48s | Avg: 28m 48s | Max: 28m 48s | Hits:  99%/1224  
  🟩 GraphCapture       Pass: 100%/1   | Total:  2h 06m | Avg:  2h 06m | Max:  2h 06m | Hits:  69%/1224  
  🟩 HostLaunch         Pass: 100%/3   | Total:  1h 29m | Avg: 29m 42s | Max: 32m 06s | Hits:  99%/3672  
  🟩 TestGPU            Pass: 100%/3   | Total:  1h 32m | Avg: 30m 53s | Max: 33m 37s | Hits:  99%/3672  
🟩 sm
  🟩 90                 Pass: 100%/3   | Total:  1h 01m | Avg: 20m 31s | Max: 29m 13s | Hits:  99%/3672  
  🟩 90;90a             Pass: 100%/2   | Total: 26m 58s | Avg: 13m 29s | Max: 20m 43s | Hits:  99%/2269  
  🟩 100;120            Pass: 100%/2   | Total: 27m 51s | Avg: 13m 55s | Max: 21m 16s | Hits:  99%/2269  
🟩 std
  🟩 17                 Pass: 100%/20  | Total:  4h 03m | Avg: 12m 09s | Max:  1h 04m | Hits:  98%/23693 
  🟩 20                 Pass: 100%/28  | Total:  8h 41m | Avg: 18m 37s | Max:  2h 06m | Hits:  98%/33475

🟩 thrust: Pass: 100%/48 | Total: 7h 59m | Avg: 9m 59s | Max: 29m 09s | Hits: 99%/85612

🟩 cmake_options
  🟩 -DTHRUST_DISPATCH_TYPE=Force32bit Pass: 100%/2   | Total: 20m 30s | Avg: 10m 15s | Max: 13m 26s | Hits:  99%/3570  
🟩 cpu
  🟩 amd64              Pass: 100%/46  | Total:  7h 48m | Avg: 10m 11s | Max: 29m 09s | Hits:  99%/82043 
  🟩 arm64              Pass: 100%/2   | Total: 10m 26s | Avg:  5m 13s | Max:  5m 42s | Hits:  99%/3569  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total: 44m 45s | Avg:  8m 57s | Max: 23m 33s | Hits:  99%/8916  
  🟩 12.6               Pass: 100%/2   | Total: 32m 49s | Avg: 16m 24s | Max: 16m 27s | Hits:  99%/3568  
  🟩 12.8               Pass: 100%/41  | Total:  6h 41m | Avg:  9m 47s | Max: 29m 09s | Hits:  99%/73128 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total: 11m 09s | Avg:  5m 34s | Max:  5m 47s | Hits: 100%/3568  
  🟩 nvcc12.0           Pass: 100%/5   | Total: 44m 45s | Avg:  8m 57s | Max: 23m 33s | Hits:  99%/8916  
  🟩 nvcc12.6           Pass: 100%/2   | Total: 32m 49s | Avg: 16m 24s | Max: 16m 27s | Hits:  99%/3568  
  🟩 nvcc12.8           Pass: 100%/39  | Total:  6h 30m | Avg: 10m 00s | Max: 29m 09s | Hits:  99%/69560 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 11m 09s | Avg:  5m 34s | Max:  5m 47s | Hits: 100%/3568  
  🟩 nvcc               Pass: 100%/46  | Total:  7h 48m | Avg: 10m 10s | Max: 29m 09s | Hits:  99%/82044 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total: 21m 24s | Avg:  5m 21s | Max:  5m 44s | Hits: 100%/7136  
  🟩 Clang15            Pass: 100%/2   | Total: 11m 59s | Avg:  5m 59s | Max:  6m 09s | Hits: 100%/3568  
  🟩 Clang16            Pass: 100%/2   | Total: 12m 21s | Avg:  6m 10s | Max:  6m 13s | Hits: 100%/3568  
  🟩 Clang17            Pass: 100%/2   | Total: 11m 27s | Avg:  5m 43s | Max:  5m 47s | Hits: 100%/3568  
  🟩 Clang18            Pass: 100%/7   | Total: 46m 44s | Avg:  6m 40s | Max: 11m 27s | Hits: 100%/12488 
  🟩 GCC7               Pass: 100%/2   | Total: 11m 16s | Avg:  5m 38s | Max:  5m 48s | Hits:  99%/3570  
  🟩 GCC8               Pass: 100%/1   | Total:  5m 38s | Avg:  5m 38s | Max:  5m 38s | Hits:  99%/1785  
  🟩 GCC9               Pass: 100%/2   | Total: 11m 38s | Avg:  5m 49s | Max:  5m 59s | Hits:  99%/3570  
  🟩 GCC10              Pass: 100%/2   | Total: 11m 56s | Avg:  5m 58s | Max:  6m 03s | Hits:  99%/3570  
  🟩 GCC11              Pass: 100%/2   | Total: 12m 52s | Avg:  6m 26s | Max:  6m 29s | Hits:  99%/3570  
  🟩 GCC12              Pass: 100%/2   | Total: 12m 48s | Avg:  6m 24s | Max:  6m 34s | Hits:  99%/3570  
  🟩 GCC13              Pass: 100%/11  | Total:  1h 45m | Avg:  9m 36s | Max: 18m 07s | Hits:  99%/19635 
  🟩 MSVC14.29          Pass: 100%/2   | Total: 46m 14s | Avg: 23m 07s | Max: 23m 33s | Hits:  99%/3556  
  🟩 MSVC14.42          Pass: 100%/5   | Total:  2h 04m | Avg: 24m 53s | Max: 29m 09s | Hits:  99%/8890  
  🟩 NVHPC25.1          Pass: 100%/2   | Total: 32m 49s | Avg: 16m 24s | Max: 16m 27s | Hits:  99%/3568  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total:  1h 43m | Avg:  6m 06s | Max: 11m 27s | Hits: 100%/30328 
  🟩 GCC                Pass: 100%/22  | Total:  2h 51m | Avg:  7m 48s | Max: 18m 07s | Hits:  99%/39270 
  🟩 MSVC               Pass: 100%/7   | Total:  2h 50m | Avg: 24m 22s | Max: 29m 09s | Hits:  99%/12446 
  🟩 NVHPC              Pass: 100%/2   | Total: 32m 49s | Avg: 16m 24s | Max: 16m 27s | Hits:  99%/3568  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 20m 26s | Avg: 10m 13s | Max: 14m 46s | Hits:  99%/3570  
  🟩 rtx2080            Pass: 100%/36  | Total:  5h 29m | Avg:  9m 09s | Max: 24m 03s | Hits:  99%/64209 
  🟩 rtx4090            Pass: 100%/10  | Total:  2h 08m | Avg: 12m 53s | Max: 29m 09s | Hits:  99%/17833 
🟩 jobs
  🟩 Build              Pass: 100%/41  | Total:  6h 21m | Avg:  9m 17s | Max: 26m 14s | Hits:  99%/73126 
  🟩 TestCPU            Pass: 100%/3   | Total: 45m 26s | Avg: 15m 08s | Max: 29m 09s | Hits:  99%/5347  
  🟩 TestGPU            Pass: 100%/4   | Total: 52m 42s | Avg: 13m 10s | Max: 14m 46s | Hits:  99%/7139  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 20m 26s | Avg: 10m 13s | Max: 14m 46s | Hits:  99%/3570  
  🟩 90;90a             Pass: 100%/2   | Total: 28m 10s | Avg: 14m 05s | Max: 21m 57s | Hits:  99%/3563  
  🟩 100;120            Pass: 100%/2   | Total: 30m 30s | Avg: 15m 15s | Max: 24m 03s | Hits:  99%/3563  
🟩 std
  🟩 17                 Pass: 100%/20  | Total:  3h 11m | Avg:  9m 34s | Max: 23m 33s | Hits:  99%/35671 
  🟩 20                 Pass: 100%/26  | Total:  4h 27m | Avg: 10m 16s | Max: 29m 09s | Hits:  99%/46371

🟩 stdpar: Pass: 100%/4 | Total: 19m 24s | Avg: 4m 51s | Max: 5m 51s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 11m 11s | Avg:  5m 35s | Max:  5m 51s
  🟩 arm64              Pass: 100%/2   | Total:  8m 13s | Avg:  4m 06s | Max:  4m 12s
🟩 ctk
  🟩 12.6               Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 cxx
  🟩 NVHPC25.1          Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 19m 24s | Avg:  4m 51s | Max:  5m 51s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  9m 21s | Avg:  4m 40s | Max:  5m 20s
  🟩 20                 Pass: 100%/2   | Total: 10m 03s | Avg:  5m 01s | Max:  5m 51s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits: 98%/320

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits:  98%/320   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 23s | Avg:  2m 23s | Max:  2m 23s | Hits:  98%/160   
  🟩 Test               Pass: 100%/1   | Total: 20m 02s | Avg: 20m 02s | Max: 20m 02s | Hits:  98%/160

🟩 python: Pass: 100%/1 | Total: 1h 15m | Avg: 1h 15m | Max: 1h 15m

🟩 cpu
  🟩 amd64              Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 ctk
  🟩 12.8               Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 cxx
  🟩 GCC13              Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 cxx_family
  🟩 GCC                Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 gpu
  🟩 rtx2080            Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m
🟩 jobs
  🟩 Test               Pass: 100%/1   | Total:  1h 15m | Avg:  1h 15m | Max:  1h 15m

👃 Inspect Changes

Modifications in project?

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

Modifications in project or dependencies?

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

🏃‍ Runner counts (total jobs: 103)

#	Runner
70	`linux-amd64-cpu16`
13	`windows-amd64-cpu16`
6	`linux-arm64-cpu16`
6	`linux-amd64-gpu-rtxa6000-latest-1`
3	`linux-amd64-gpu-h100-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`
2	`linux-amd64-gpu-rtx2080-latest-1`

Fix grid dependency sync in cub::DeviceMergeSort (NVIDIA#5456)

0d86fe0

The sync was too late and did not guard loading from merge_partitions, leading to a data race

bernhardmgruber requested a review from a team as a code owner August 7, 2025 18:47

bernhardmgruber requested a review from fbusato August 7, 2025 18:47

github-project-automation bot added this to CCCL Aug 7, 2025

github-project-automation bot moved this to Todo in CCCL Aug 7, 2025

cccl-authenticator-app bot moved this from Todo to In Review in CCCL Aug 7, 2025

fbusato approved these changes Aug 7, 2025

View reviewed changes

bernhardmgruber enabled auto-merge (squash) August 7, 2025 19:17

miscco approved these changes Aug 8, 2025

View reviewed changes

Merge branch 'branch/3.0.x' into backport_pdl_fix_30

e975e16

bernhardmgruber merged commit a7a0fd5 into NVIDIA:branch/3.0.x Aug 8, 2025
117 checks passed

github-project-automation bot moved this from In Review to Done in CCCL Aug 8, 2025

bernhardmgruber deleted the backport_pdl_fix_30 branch August 9, 2025 00:21

Backport to 3.0: Fix grid dependency sync in cub::DeviceMergeSort (#5456) #5461

Backport to 3.0: Fix grid dependency sync in cub::DeviceMergeSort (#5456) #5461

Uh oh!

Conversation

bernhardmgruber commented Aug 7, 2025

Uh oh!

github-actions bot commented Aug 7, 2025

🟨 cub: Pass: 97%/48 | Total: 2d 02h | Avg: 1h 02m | Max: 1h 28m | Hits: 66%/55944

🟥 python: Pass: 0%/1 | Total: 6m 24s | Avg: 6m 24s | Max: 6m 24s

🟩 thrust: Pass: 100%/48 | Total: 1d 02h | Avg: 33m 26s | Max: 59m 40s | Hits: 84%/85612

🟩 stdpar: Pass: 100%/4 | Total: 44m 11s | Avg: 11m 02s | Max: 13m 57s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 21m 56s | Avg: 10m 58s | Max: 17m 54s | Hits: 65%/320

👃 Inspect Changes

Modifications in project?

Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 103)

Uh oh!

bernhardmgruber commented Aug 8, 2025

Uh oh!

github-actions bot commented Aug 8, 2025

🟩 cub: Pass: 100%/48 | Total: 12h 45m | Avg: 15m 56s | Max: 2h 06m | Hits: 98%/57168

🟩 thrust: Pass: 100%/48 | Total: 7h 59m | Avg: 9m 59s | Max: 29m 09s | Hits: 99%/85612

🟩 stdpar: Pass: 100%/4 | Total: 19m 24s | Avg: 4m 51s | Max: 5m 51s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 22m 25s | Avg: 11m 12s | Max: 20m 02s | Hits: 98%/320

🟩 python: Pass: 100%/1 | Total: 1h 15m | Avg: 1h 15m | Max: 1h 15m

👃 Inspect Changes

Modifications in project?

Modifications in project or dependencies?

🏃‍ Runner counts (total jobs: 103)

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants