Allow default-initializing Thrust vectors #4183

bernhardmgruber · 2025-03-19T03:26:18Z

I was having this changeset for a while now, but didn't push it, since the discussion in #1992 and among the team was somewhat controversial. However, I keep getting asked about this every now and then, so here is it: an overload for a Thrust vector's constructor and resize member function to turn value initialization into default initialization. I refer to #1992 for rational and discussion.

Fixes: #1992

Compiling dv.cu:

#include <thrust/device_vector.h>
int main() {
  thrust::device_vector<int> v(10, thrust::default_init);
  v.resize(100, thrust::default_init);
}

with

nvcc -Ithrust -Icub -Ilibcudacxx/include dv.cu

and dumping the SASS shows that only code for cub::detail::EmptyKernel is generated.

bernhardmgruber · 2025-03-19T03:27:05Z

thrust/thrust/detail/vector_base.h

+struct default_init_t
+{};
+
+constexpr default_init_t default_init;
+


Given the range of opinions on this feature, I am also fine with wrapping those two entities in an experimental namespace.

github-actions · 2025-03-19T06:23:09Z

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👃 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: 97)

#	Runner
68	`linux-amd64-cpu16`
9	`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`

Fixes: NVIDIA#1992

github-actions · 2025-03-19T08:14:28Z

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  🟩 Clang17            Pass: 100%/2   | Total:  2h 00m | Avg:  1h 00m | Max:  1h 01m | Hits:  69%/2444  
  🟩 Clang18            Pass: 100%/7   | Total:  5h 52m | Avg: 50m 23s | Max:  1h 04m | Hits:  80%/8218  
  🟩 GCC7               Pass: 100%/2   | Total:  1h 40m | Avg: 50m 18s | Max: 51m 32s | Hits:  69%/2448  
  🟩 GCC8               Pass: 100%/1   | Total: 47m 41s | Avg: 47m 41s | Max: 47m 41s | Hits:  69%/1224  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 41m | Avg: 50m 37s | Max: 53m 22s | Hits:  69%/2448  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 39m | Avg: 49m 39s | Max: 49m 54s | Hits:  69%/2448  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 39m | Avg: 49m 58s | Max: 51m 21s | Hits:  69%/2444  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 38m | Avg: 49m 18s | Max: 50m 12s | Hits:  69%/2444  
  🟩 GCC13              Pass: 100%/11  | Total:  6h 14m | Avg: 34m 03s | Max: 47m 57s | Hits:  82%/13442 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 54m | Avg: 57m 29s | Max: 58m 47s | Hits:  75%/2088  
  🟩 MSVC14.42          Pass: 100%/2   | Total:  1h 56m | Avg: 58m 02s | Max: 58m 19s | Hits:  75%/2088  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total: 16h 07m | Avg: 56m 55s | Max:  1h 05m | Hits:  73%/20446 
  🟩 GCC                Pass: 100%/22  | Total: 15h 21m | Avg: 41m 54s | Max: 53m 22s | Hits:  75%/26898 
  🟩 MSVC               Pass: 100%/4   | Total:  3h 51m | Avg: 57m 45s | Max: 58m 47s | Hits:  75%/4176  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
🟩 gpu
  🟩 h100               Pass: 100%/3   | Total:  1h 37m | Avg: 32m 39s | Max: 47m 57s | Hits:  78%/3666  
  🟩 rtx2080            Pass: 100%/34  | Total:  1d 08h | Avg: 56m 33s | Max:  1h 12m | Hits:  70%/40338 
  🟩 rtxa6000           Pass: 100%/8   | Total:  4h 03m | Avg: 30m 25s | Max:  1h 00m | Hits:  92%/9776  
🟩 jobs
  🟩 Build              Pass: 100%/37  | Total:  1d 10h | Avg: 55m 33s | Max:  1h 12m | Hits:  69%/44004 
  🟩 DeviceLaunch       Pass: 100%/1   | Total: 22m 27s | Avg: 22m 27s | Max: 22m 27s | Hits:  99%/1222  
  🟩 GraphCapture       Pass: 100%/1   | Total: 17m 41s | Avg: 17m 41s | Max: 17m 41s | Hits:  99%/1222  
  🟩 HostLaunch         Pass: 100%/3   | Total:  1h 14m | Avg: 24m 43s | Max: 25m 35s | Hits:  99%/3666  
  🟩 TestGPU            Pass: 100%/3   | Total:  1h 34m | Avg: 31m 35s | Max: 47m 57s | Hits:  89%/3666  
🟩 sm
  🟩 90                 Pass: 100%/3   | Total:  1h 37m | Avg: 32m 39s | Max: 47m 57s | Hits:  78%/3666  
  🟩 90;90a;100         Pass: 100%/1   | Total: 46m 09s | Avg: 46m 09s | Max: 46m 09s | Hits:  67%/1222  
🟩 std
  🟩 17                 Pass: 100%/20  | Total: 18h 42m | Avg: 56m 08s | Max:  1h 11m | Hits:  70%/23662 
  🟩 20                 Pass: 100%/25  | Total: 19h 01m | Avg: 45m 40s | Max:  1h 12m | Hits:  78%/30118

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 cmake_options
  🟩 -DTHRUST_DISPATCH_TYPE=Force32bit Pass: 100%/2   | Total: 41m 30s | Avg: 20m 45s | Max: 29m 57s | Hits:  78%/3566  
🟩 cpu
  🟩 amd64              Pass: 100%/43  | Total: 23h 42m | Avg: 33m 04s | Max:  1h 02m | Hits:  65%/76616 
  🟩 arm64              Pass: 100%/2   | Total:  1h 01m | Avg: 30m 31s | Max: 31m 52s | Hits:  56%/3565  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  3h 11m | Avg: 38m 14s | Max: 58m 14s | Hits:  61%/8906  
  🟩 12.6               Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
  🟩 12.8               Pass: 100%/38  | Total: 19h 29m | Avg: 30m 47s | Max:  1h 00m | Hits:  66%/67711 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total: 56m 07s | Avg: 28m 03s | Max: 28m 24s | Hits:  56%/3564  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  3h 11m | Avg: 38m 14s | Max: 58m 14s | Hits:  61%/8906  
  🟩 nvcc12.6           Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
  🟩 nvcc12.8           Pass: 100%/36  | Total: 18h 33m | Avg: 30m 56s | Max:  1h 00m | Hits:  66%/64147 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 56m 07s | Avg: 28m 03s | Max: 28m 24s | Hits:  56%/3564  
  🟩 nvcc               Pass: 100%/43  | Total: 23h 47m | Avg: 33m 11s | Max:  1h 02m | Hits:  65%/76617 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  2h 08m | Avg: 32m 03s | Max: 33m 19s | Hits:  60%/7128  
  🟩 Clang15            Pass: 100%/2   | Total:  1h 04m | Avg: 32m 15s | Max: 32m 17s | Hits:  56%/3564  
  🟩 Clang16            Pass: 100%/2   | Total:  1h 06m | Avg: 33m 07s | Max: 33m 22s | Hits:  56%/3564  
  🟩 Clang17            Pass: 100%/2   | Total:  1h 06m | Avg: 33m 15s | Max: 34m 05s | Hits:  56%/3564  
  🟩 Clang18            Pass: 100%/7   | Total:  2h 47m | Avg: 23m 53s | Max: 33m 09s | Hits:  69%/12474 
  🟩 GCC7               Pass: 100%/2   | Total:  1h 06m | Avg: 33m 21s | Max: 33m 26s | Hits:  60%/3566  
  🟩 GCC8               Pass: 100%/1   | Total: 33m 24s | Avg: 33m 24s | Max: 33m 24s | Hits:  56%/1783  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 09m | Avg: 34m 51s | Max: 35m 18s | Hits:  66%/3566  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 06m | Avg: 33m 09s | Max: 33m 15s | Hits:  56%/3566  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 10m | Avg: 35m 15s | Max: 35m 50s | Hits:  56%/3566  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 15m | Avg: 37m 45s | Max: 38m 21s | Hits:  56%/3566  
  🟩 GCC13              Pass: 100%/10  | Total:  3h 44m | Avg: 22m 29s | Max: 34m 51s | Hits:  78%/17830 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 56m | Avg: 58m 03s | Max: 58m 14s | Hits:  57%/3552  
  🟩 MSVC14.42          Pass: 100%/3   | Total:  2h 25m | Avg: 48m 25s | Max:  1h 00m | Hits:  68%/5328  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total:  8h 12m | Avg: 28m 59s | Max: 34m 05s | Hits:  62%/30294 
  🟩 GCC                Pass: 100%/21  | Total: 10h 07m | Avg: 28m 54s | Max: 38m 21s | Hits:  68%/37443 
  🟩 MSVC               Pass: 100%/5   | Total:  4h 21m | Avg: 52m 16s | Max:  1h 00m | Hits:  63%/8880  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 34m 00s | Avg: 17m 00s | Max: 22m 24s | Hits:  78%/3566  
  🟩 rtx2080            Pass: 100%/33  | Total: 20h 20m | Avg: 36m 59s | Max:  1h 02m | Hits:  58%/58802 
  🟩 rtx4090            Pass: 100%/10  | Total:  3h 48m | Avg: 22m 49s | Max:  1h 00m | Hits:  84%/17813 
🟩 jobs
  🟩 Build              Pass: 100%/38  | Total: 23h 15m | Avg: 36m 44s | Max:  1h 02m | Hits:  58%/67709 
  🟩 TestCPU            Pass: 100%/3   | Total: 41m 42s | Avg: 13m 54s | Max: 25m 39s | Hits:  99%/5341  
  🟩 TestGPU            Pass: 100%/4   | Total: 45m 32s | Avg: 11m 23s | Max: 11m 45s | Hits:  99%/7131  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 34m 00s | Avg: 17m 00s | Max: 22m 24s | Hits:  78%/3566  
  🟩 90;90a;100         Pass: 100%/1   | Total: 31m 08s | Avg: 31m 08s | Max: 31m 08s | Hits:  80%/1783  
🟩 std
  🟩 17                 Pass: 100%/20  | Total: 12h 52m | Avg: 38m 37s | Max:  1h 02m | Hits:  58%/35631 
  🟩 20                 Pass: 100%/23  | Total: 11h 09m | Avg: 29m 06s | Max:  1h 00m | Hits:  70%/40984

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total:  9m 47s | Avg:  4m 53s | Max:  5m 04s
  🟩 arm64              Pass: 100%/2   | Total:  7m 27s | Avg:  3m 43s | Max:  3m 53s
🟩 ctk
  🟩 12.6               Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cxx
  🟩 NVHPC25.1          Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  8m 38s | Avg:  4m 19s | Max:  5m 04s
  🟩 20                 Pass: 100%/2   | Total:  8m 36s | Avg:  4m 18s | Max:  4m 43s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 15s | Avg:  2m 15s | Max:  2m 15s | Hits:  98%/160   
  🟩 Test               Pass: 100%/1   | Total: 14m 12s | Avg: 14m 12s | Max: 14m 12s | 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: 97)

#	Runner
68	`linux-amd64-cpu16`
9	`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`

miscco · 2025-03-19T09:16:28Z

thrust/thrust/detail/vector_base.h

@@ -45,6 +45,11 @@

 THRUST_NAMESPACE_BEGIN

+struct default_init_t


With cudax we went with uninit_t which I find easier for non-expert users

I thought default initialization was the safer way, since you cannot skip constructors. I am fine with also providing uninit_t. Would you be fine if I opened a separate PR for that?

Honestly I am a bit hesitant here.

The main reason people want to use this is to avoid calling a kernel for instantiation. This breaking for non-trivial types will be a source of frustration / bugs.

We should rather give them the right tool that "works" everywhere, even if it is a sharp edge

github-actions · 2025-03-21T08:15:58Z

🟩 CI finished in 2d 01h: Pass: 100%/97 | Total: 2d 16h | Avg: 39m 42s | Max: 1h 12m | Hits: 69%/134281

🟩 cub: Pass: 100%/45 | Total: 1d 13h | Avg: 50m 19s | Max: 1h 12m | Hits: 74%/53780

🟩 cpu
  🟩 amd64              Pass: 100%/43  | Total:  1d 11h | Avg: 50m 08s | Max:  1h 12m | Hits:  74%/51336 
  🟩 arm64              Pass: 100%/2   | Total:  1h 48m | Avg: 54m 09s | Max:  1h 01m | Hits:  69%/2444  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  4h 47m | Avg: 57m 27s | Max:  1h 02m | Hits:  70%/5940  
  🟩 12.6               Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
  🟩 12.8               Pass: 100%/38  | Total:  1d 06h | Avg: 48m 14s | Max:  1h 05m | Hits:  75%/45580 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total:  2h 06m | Avg:  1h 03m | Max:  1h 04m | Hits:  75%/2108  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  4h 47m | Avg: 57m 27s | Max:  1h 02m | Hits:  70%/5940  
  🟩 nvcc12.6           Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
  🟩 nvcc12.8           Pass: 100%/36  | Total:  1d 04h | Avg: 47m 24s | Max:  1h 05m | Hits:  75%/43472 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total:  2h 06m | Avg:  1h 03m | Max:  1h 04m | Hits:  75%/2108  
  🟩 nvcc               Pass: 100%/43  | Total:  1d 11h | Avg: 49m 43s | Max:  1h 12m | Hits:  74%/51672 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  4h 10m | Avg:  1h 02m | Max:  1h 05m | Hits:  69%/4896  
  🟩 Clang15            Pass: 100%/2   | Total:  2h 00m | Avg:  1h 00m | Max:  1h 01m | Hits:  69%/2444  
  🟩 Clang16            Pass: 100%/2   | Total:  2h 04m | Avg:  1h 02m | Max:  1h 05m | Hits:  69%/2444  
  🟩 Clang17            Pass: 100%/2   | Total:  2h 00m | Avg:  1h 00m | Max:  1h 01m | Hits:  69%/2444  
  🟩 Clang18            Pass: 100%/7   | Total:  5h 52m | Avg: 50m 23s | Max:  1h 04m | Hits:  80%/8218  
  🟩 GCC7               Pass: 100%/2   | Total:  1h 40m | Avg: 50m 18s | Max: 51m 32s | Hits:  69%/2448  
  🟩 GCC8               Pass: 100%/1   | Total: 47m 41s | Avg: 47m 41s | Max: 47m 41s | Hits:  69%/1224  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 41m | Avg: 50m 37s | Max: 53m 22s | Hits:  69%/2448  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 39m | Avg: 49m 39s | Max: 49m 54s | Hits:  69%/2448  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 39m | Avg: 49m 58s | Max: 51m 21s | Hits:  69%/2444  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 38m | Avg: 49m 18s | Max: 50m 12s | Hits:  69%/2444  
  🟩 GCC13              Pass: 100%/11  | Total:  6h 14m | Avg: 34m 03s | Max: 47m 57s | Hits:  82%/13442 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 54m | Avg: 57m 29s | Max: 58m 47s | Hits:  75%/2088  
  🟩 MSVC14.42          Pass: 100%/2   | Total:  1h 56m | Avg: 58m 02s | Max: 58m 19s | Hits:  75%/2088  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total: 16h 07m | Avg: 56m 55s | Max:  1h 05m | Hits:  73%/20446 
  🟩 GCC                Pass: 100%/22  | Total: 15h 21m | Avg: 41m 54s | Max: 53m 22s | Hits:  75%/26898 
  🟩 MSVC               Pass: 100%/4   | Total:  3h 51m | Avg: 57m 45s | Max: 58m 47s | Hits:  75%/4176  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 23m | Avg:  1h 11m | Max:  1h 12m | Hits:  69%/2260  
🟩 gpu
  🟩 h100               Pass: 100%/3   | Total:  1h 37m | Avg: 32m 39s | Max: 47m 57s | Hits:  78%/3666  
  🟩 rtx2080            Pass: 100%/34  | Total:  1d 08h | Avg: 56m 33s | Max:  1h 12m | Hits:  70%/40338 
  🟩 rtxa6000           Pass: 100%/8   | Total:  4h 03m | Avg: 30m 25s | Max:  1h 00m | Hits:  92%/9776  
🟩 jobs
  🟩 Build              Pass: 100%/37  | Total:  1d 10h | Avg: 55m 33s | Max:  1h 12m | Hits:  69%/44004 
  🟩 DeviceLaunch       Pass: 100%/1   | Total: 22m 27s | Avg: 22m 27s | Max: 22m 27s | Hits:  99%/1222  
  🟩 GraphCapture       Pass: 100%/1   | Total: 17m 41s | Avg: 17m 41s | Max: 17m 41s | Hits:  99%/1222  
  🟩 HostLaunch         Pass: 100%/3   | Total:  1h 14m | Avg: 24m 43s | Max: 25m 35s | Hits:  99%/3666  
  🟩 TestGPU            Pass: 100%/3   | Total:  1h 34m | Avg: 31m 35s | Max: 47m 57s | Hits:  89%/3666  
🟩 sm
  🟩 90                 Pass: 100%/3   | Total:  1h 37m | Avg: 32m 39s | Max: 47m 57s | Hits:  78%/3666  
  🟩 90;90a;100         Pass: 100%/1   | Total: 46m 09s | Avg: 46m 09s | Max: 46m 09s | Hits:  67%/1222  
🟩 std
  🟩 17                 Pass: 100%/20  | Total: 18h 42m | Avg: 56m 08s | Max:  1h 11m | Hits:  70%/23662 
  🟩 20                 Pass: 100%/25  | Total: 19h 01m | Avg: 45m 40s | Max:  1h 12m | Hits:  78%/30118

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 cmake_options
  🟩 -DTHRUST_DISPATCH_TYPE=Force32bit Pass: 100%/2   | Total: 41m 30s | Avg: 20m 45s | Max: 29m 57s | Hits:  78%/3566  
🟩 cpu
  🟩 amd64              Pass: 100%/43  | Total: 23h 42m | Avg: 33m 04s | Max:  1h 02m | Hits:  65%/76616 
  🟩 arm64              Pass: 100%/2   | Total:  1h 01m | Avg: 30m 31s | Max: 31m 52s | Hits:  56%/3565  
🟩 ctk
  🟩 12.0               Pass: 100%/5   | Total:  3h 11m | Avg: 38m 14s | Max: 58m 14s | Hits:  61%/8906  
  🟩 12.6               Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
  🟩 12.8               Pass: 100%/38  | Total: 19h 29m | Avg: 30m 47s | Max:  1h 00m | Hits:  66%/67711 
🟩 cudacxx
  🟩 ClangCUDA18        Pass: 100%/2   | Total: 56m 07s | Avg: 28m 03s | Max: 28m 24s | Hits:  56%/3564  
  🟩 nvcc12.0           Pass: 100%/5   | Total:  3h 11m | Avg: 38m 14s | Max: 58m 14s | Hits:  61%/8906  
  🟩 nvcc12.6           Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
  🟩 nvcc12.8           Pass: 100%/36  | Total: 18h 33m | Avg: 30m 56s | Max:  1h 00m | Hits:  66%/64147 
🟩 cudacxx_family
  🟩 ClangCUDA          Pass: 100%/2   | Total: 56m 07s | Avg: 28m 03s | Max: 28m 24s | Hits:  56%/3564  
  🟩 nvcc               Pass: 100%/43  | Total: 23h 47m | Avg: 33m 11s | Max:  1h 02m | Hits:  65%/76617 
🟩 cxx
  🟩 Clang14            Pass: 100%/4   | Total:  2h 08m | Avg: 32m 03s | Max: 33m 19s | Hits:  60%/7128  
  🟩 Clang15            Pass: 100%/2   | Total:  1h 04m | Avg: 32m 15s | Max: 32m 17s | Hits:  56%/3564  
  🟩 Clang16            Pass: 100%/2   | Total:  1h 06m | Avg: 33m 07s | Max: 33m 22s | Hits:  56%/3564  
  🟩 Clang17            Pass: 100%/2   | Total:  1h 06m | Avg: 33m 15s | Max: 34m 05s | Hits:  56%/3564  
  🟩 Clang18            Pass: 100%/7   | Total:  2h 47m | Avg: 23m 53s | Max: 33m 09s | Hits:  69%/12474 
  🟩 GCC7               Pass: 100%/2   | Total:  1h 06m | Avg: 33m 21s | Max: 33m 26s | Hits:  60%/3566  
  🟩 GCC8               Pass: 100%/1   | Total: 33m 24s | Avg: 33m 24s | Max: 33m 24s | Hits:  56%/1783  
  🟩 GCC9               Pass: 100%/2   | Total:  1h 09m | Avg: 34m 51s | Max: 35m 18s | Hits:  66%/3566  
  🟩 GCC10              Pass: 100%/2   | Total:  1h 06m | Avg: 33m 09s | Max: 33m 15s | Hits:  56%/3566  
  🟩 GCC11              Pass: 100%/2   | Total:  1h 10m | Avg: 35m 15s | Max: 35m 50s | Hits:  56%/3566  
  🟩 GCC12              Pass: 100%/2   | Total:  1h 15m | Avg: 37m 45s | Max: 38m 21s | Hits:  56%/3566  
  🟩 GCC13              Pass: 100%/10  | Total:  3h 44m | Avg: 22m 29s | Max: 34m 51s | Hits:  78%/17830 
  🟩 MSVC14.29          Pass: 100%/2   | Total:  1h 56m | Avg: 58m 03s | Max: 58m 14s | Hits:  57%/3552  
  🟩 MSVC14.42          Pass: 100%/3   | Total:  2h 25m | Avg: 48m 25s | Max:  1h 00m | Hits:  68%/5328  
  🟩 NVHPC25.1          Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
🟩 cxx_family
  🟩 Clang              Pass: 100%/17  | Total:  8h 12m | Avg: 28m 59s | Max: 34m 05s | Hits:  62%/30294 
  🟩 GCC                Pass: 100%/21  | Total: 10h 07m | Avg: 28m 54s | Max: 38m 21s | Hits:  68%/37443 
  🟩 MSVC               Pass: 100%/5   | Total:  4h 21m | Avg: 52m 16s | Max:  1h 00m | Hits:  63%/8880  
  🟩 NVHPC              Pass: 100%/2   | Total:  2h 02m | Avg:  1h 01m | Max:  1h 02m | Hits:  52%/3564  
🟩 gpu
  🟩 h100               Pass: 100%/2   | Total: 34m 00s | Avg: 17m 00s | Max: 22m 24s | Hits:  78%/3566  
  🟩 rtx2080            Pass: 100%/33  | Total: 20h 20m | Avg: 36m 59s | Max:  1h 02m | Hits:  58%/58802 
  🟩 rtx4090            Pass: 100%/10  | Total:  3h 48m | Avg: 22m 49s | Max:  1h 00m | Hits:  84%/17813 
🟩 jobs
  🟩 Build              Pass: 100%/38  | Total: 23h 15m | Avg: 36m 44s | Max:  1h 02m | Hits:  58%/67709 
  🟩 TestCPU            Pass: 100%/3   | Total: 41m 42s | Avg: 13m 54s | Max: 25m 39s | Hits:  99%/5341  
  🟩 TestGPU            Pass: 100%/4   | Total: 45m 32s | Avg: 11m 23s | Max: 11m 45s | Hits:  99%/7131  
🟩 sm
  🟩 90                 Pass: 100%/2   | Total: 34m 00s | Avg: 17m 00s | Max: 22m 24s | Hits:  78%/3566  
  🟩 90;90a;100         Pass: 100%/1   | Total: 31m 08s | Avg: 31m 08s | Max: 31m 08s | Hits:  80%/1783  
🟩 std
  🟩 17                 Pass: 100%/20  | Total: 12h 52m | Avg: 38m 37s | Max:  1h 02m | Hits:  58%/35631 
  🟩 20                 Pass: 100%/23  | Total: 11h 09m | Avg: 29m 06s | Max:  1h 00m | Hits:  70%/40984

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total:  9m 47s | Avg:  4m 53s | Max:  5m 04s
  🟩 arm64              Pass: 100%/2   | Total:  7m 27s | Avg:  3m 43s | Max:  3m 53s
🟩 ctk
  🟩 12.6               Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cudacxx
  🟩 nvcc12.6           Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cxx
  🟩 NVHPC25.1          Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 cxx_family
  🟩 NVHPC              Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 gpu
  🟩 rtx2080            Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 jobs
  🟩 Build              Pass: 100%/4   | Total: 17m 14s | Avg:  4m 18s | Max:  5m 04s
🟩 std
  🟩 17                 Pass: 100%/2   | Total:  8m 38s | Avg:  4m 19s | Max:  5m 04s
  🟩 20                 Pass: 100%/2   | Total:  8m 36s | Avg:  4m 18s | Max:  4m 43s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 16m 27s | Avg:  8m 13s | Max: 14m 12s | Hits:  98%/320   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 15s | Avg:  2m 15s | Max:  2m 15s | Hits:  98%/160   
  🟩 Test               Pass: 100%/1   | Total: 14m 12s | Avg: 14m 12s | Max: 14m 12s | Hits:  98%/160

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

🟩 cpu
  🟩 amd64              Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 ctk
  🟩 12.8               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cxx
  🟩 GCC13              Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 cxx_family
  🟩 GCC                Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 gpu
  🟩 rtx2080            Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m
🟩 jobs
  🟩 Test               Pass: 100%/1   | Total:  1h 10m | Avg:  1h 10m | Max:  1h 10m

👃 Inspect Changes

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	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: 97)

#	Runner
68	`linux-amd64-cpu16`
9	`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 requested a review from a team as a code owner March 19, 2025 03:26

bernhardmgruber requested a review from elstehle March 19, 2025 03:26

bernhardmgruber commented Mar 19, 2025

View reviewed changes

bernhardmgruber added 2 commits March 18, 2025 23:41

Allow default-initializing Thrust vector elements

10f28df

Fixes: NVIDIA#1992

fix

9e07c71

bernhardmgruber force-pushed the vec_default_init branch from dffa87c to 9e07c71 Compare March 19, 2025 06:41

miscco reviewed Mar 19, 2025

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Allow default-initializing Thrust vectors #4183

Allow default-initializing Thrust vectors #4183

bernhardmgruber commented Mar 19, 2025 •

edited

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bernhardmgruber Mar 19, 2025

github-actions bot commented Mar 19, 2025

🟨 cub: Pass: 88%/45 | Total: 1d 15h | Avg: 52m 29s | Max: 1h 53m | Hits: 72%/47670

🟩 thrust: Pass: 100%/45 | Total: 1d 01h | Avg: 33m 50s | Max: 1h 09m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 16m 40s | Avg: 4m 10s | Max: 4m 59s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 17m 15s | Avg: 8m 37s | Max: 14m 54s | Hits: 98%/320

🟩 python: Pass: 100%/1 | Total: 1h 08m | Avg: 1h 08m | Max: 1h 08m

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🏃‍ Runner counts (total jobs: 97)

github-actions bot commented Mar 19, 2025

🟥 python: Pass: 0%/1 | Total: 11m 29s | Avg: 11m 29s | Max: 11m 29s

🟩 cub: Pass: 100%/45 | Total: 1d 13h | Avg: 50m 19s | Max: 1h 12m | Hits: 74%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

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🏃‍ Runner counts (total jobs: 97)

miscco Mar 19, 2025

bernhardmgruber Mar 21, 2025

miscco Mar 21, 2025

github-actions bot commented Mar 21, 2025

🟩 cub: Pass: 100%/45 | Total: 1d 13h | Avg: 50m 19s | Max: 1h 12m | Hits: 74%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

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		@@ -45,6 +45,11 @@

		THRUST_NAMESPACE_BEGIN

		struct default_init_t

Allow default-initializing Thrust vectors #4183

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Allow default-initializing Thrust vectors #4183

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bernhardmgruber commented Mar 19, 2025 • edited Loading

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github-actions bot commented Mar 19, 2025

🟨 cub: Pass: 88%/45 | Total: 1d 15h | Avg: 52m 29s | Max: 1h 53m | Hits: 72%/47670

🟩 thrust: Pass: 100%/45 | Total: 1d 01h | Avg: 33m 50s | Max: 1h 09m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 16m 40s | Avg: 4m 10s | Max: 4m 59s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 17m 15s | Avg: 8m 37s | Max: 14m 54s | Hits: 98%/320

🟩 python: Pass: 100%/1 | Total: 1h 08m | Avg: 1h 08m | Max: 1h 08m

👃 Inspect Changes

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🏃‍ Runner counts (total jobs: 97)

github-actions bot commented Mar 19, 2025

🟥 python: Pass: 0%/1 | Total: 11m 29s | Avg: 11m 29s | Max: 11m 29s

🟩 cub: Pass: 100%/45 | Total: 1d 13h | Avg: 50m 19s | Max: 1h 12m | Hits: 74%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

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🏃‍ Runner counts (total jobs: 97)

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github-actions bot commented Mar 21, 2025

🟩 cub: Pass: 100%/45 | Total: 1d 13h | Avg: 50m 19s | Max: 1h 12m | Hits: 74%/53780

🟩 thrust: Pass: 100%/45 | Total: 1d 00h | Avg: 32m 57s | Max: 1h 02m | Hits: 65%/80181

🟩 stdpar: Pass: 100%/4 | Total: 17m 14s | Avg: 4m 18s | Max: 5m 04s

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 16m 27s | Avg: 8m 13s | Max: 14m 12s | Hits: 98%/320

🟩 python: Pass: 100%/1 | Total: 1h 10m | Avg: 1h 10m | Max: 1h 10m

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🏃‍ Runner counts (total jobs: 97)

bernhardmgruber commented Mar 19, 2025 •

edited

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