Distributed training raises ncclUnhandledCudaError

HQJo: <p>I am running distributed training codes on a single nodes with 8 GPUs. It raises the following errors:</p>
<blockquote>
<p>Traceback (most recent call last):<br>
File “/home/hqjo/anaconda3/envs/torch/lib/python3.9/site-packages/torch/multiprocessing/spawn.py”, line 74, in _wrap<br>
fn(i, *args)<br>
File “/home/hqjo/lgame-community/test_dist.py”, line 16, in example<br>
ddp_model = DDP(model, device_ids=[rank])<br>
File “/home/hqjo/anaconda3/envs/torch/lib/python3.9/site-packages/torch/nn/parallel/distributed.py”, line 795, in <strong>init</strong><br>
_verify_param_shape_across_processes(self.process_group, parameters)<br>
File “/home/hqjo/anaconda3/envs/torch/lib/python3.9/site-packages/torch/distributed/utils.py”, line 265, in _verify_param_shape_across_processes<br>
return dist._verify_params_across_processes(process_group, tensors, logger)<br>
torch.distributed.DistBackendError: NCCL error in: /opt/conda/conda-bld/pytorch_1695392035629/work/torch/csrc/distributed/c10d/ProcessGroupNCCL.cpp:1331, unhandled cuda error (run with NCCL_DEBUG=INFO for details), NCCL version 2.18.5<br>
ncclUnhandledCudaError: Call to CUDA function failed.</p>
</blockquote>
<p>Besides, when I use 2 gpus(setting wolrd_size to 2 in the code), it works well. This error only occurs when I use more than 2 gpus.</p>
<p>Any idea to solve this problem?</p>
<p>My example codes:</p>
<pre><code class="lang-auto">import torch
import torch.distributed as dist
import torch.multiprocessing as mp
import torch.nn as nn
import torch.optim as optim
import os
from torch.nn.parallel import DistributedDataParallel as DDP


def example(rank, world_size):
    # create default process group
    dist.init_process_group("nccl", rank=rank, world_size=world_size)
    # create local model
    model = nn.Linear(10, 10).to(rank)
    # construct DDP model
    ddp_model = DDP(model, device_ids=[rank])
    # define loss function and optimizer
    loss_fn = nn.MSELoss()
    optimizer = optim.SGD(ddp_model.parameters(), lr=0.001)

    # forward pass
    outputs = ddp_model(torch.randn(20, 10).to(rank))
    labels = torch.randn(20, 10).to(rank)
    # backward pass
    loss_fn(outputs, labels).backward()
    # update parameters
    optimizer.step()

def main():
    world_size = 4
    mp.spawn(example,
        args=(world_size,),
        nprocs=world_size,
        join=True)

if __name__=="__main__":
    # Environment variables which need to be
    # set when using c10d's default "env"
    # initialization mode.
    os.environ["MASTER_ADDR"] = "localhost"
    os.environ["MASTER_PORT"] = "29500"
    main()
    print("Done.")
</code></pre>
<p>Environment:</p>
<blockquote>
<p>Collecting environment information…<br>
Collecting environment information…<br>
PyTorch version: 2.1.0<br>
Is debug build: False<br>
CUDA used to build PyTorch: 12.1<br>
ROCM used to build PyTorch: N/A</p>
<p>OS: Ubuntu 22.04.5 LTS (x86_64)<br>
GCC version: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0<br>
Clang version: Could not collect<br>
CMake version: Could not collect<br>
Libc version: glibc-2.35</p>
<p>Python version: 3.9.20 (main, Oct  3 2024, 07:27:41)  [GCC 11.2.0] (64-bit runtime)<br>
Python platform: Linux-6.5.0-28-generic-x86_64-with-glibc2.35<br>
Is CUDA available: True<br>
CUDA runtime version: Could not collect<br>
CUDA_MODULE_LOADING set to: LAZY<br>
GPU models and configuration:<br>
GPU 0: NVIDIA H100 80GB HBM3<br>
GPU 1: NVIDIA H100 80GB HBM3<br>
GPU 2: NVIDIA H100 80GB HBM3<br>
GPU 3: NVIDIA H100 80GB HBM3<br>
GPU 4: NVIDIA H100 80GB HBM3<br>
GPU 5: NVIDIA H100 80GB HBM3<br>
GPU 6: NVIDIA H100 80GB HBM3<br>
GPU 7: NVIDIA H100 80GB HBM3</p>
<p>Nvidia driver version: 535.183.06<br>
cuDNN version: Could not collect<br>
HIP runtime version: N/A<br>
MIOpen runtime version: N/A<br>
Is XNNPACK available: True</p>
<p>CPU:<br>
Architecture:        x86_64<br>
CPU op-mode(s):      32-bit, 64-bit<br>
Address sizes:       46 bits physical, 57 bits virtual<br>
Byte Order:          Little Endian<br>
CPU(s):              192<br>
On-line CPU(s) list: 0-191<br>
Vendor ID:           GenuineIntel<br>
Model name:          Intel(R) Xeon(R) Platinum 8468<br>
CPU family:          6<br>
Model:               143<br>
Thread(s) per core:  2<br>
Core(s) per socket:  48<br>
Socket(s):           2<br>
Stepping:            8<br>
CPU max MHz:         3800.0000<br>
CPU min MHz:         800.0000<br>
BogoMIPS:            4200.00<br>
Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 cat_l2 cdp_l3 invpcid_single cdp_l2 ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local split_lock_detect avx_vnni avx512_bf16 wbnoinvd dtherm ida arat pln pts vnmi avx512vbmi umip pku ospke waitpkg avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq la57 rdpid bus_lock_detect cldemote movdiri movdir64b enqcmd fsrm md_clear serialize tsxldtrk pconfig arch_lbr ibt amx_bf16 avx512_fp16 amx_tile amx_int8 flush_l1d arch_capabilities<br>
Virtualization:      VT-x<br>
L1d cache:           4.5 MiB (96 instances)<br>
L1i cache:           3 MiB (96 instances)<br>
L2 cache:            192 MiB (96 instances)<br>
L3 cache:            210 MiB (2 instances)<br>
NUMA node(s):        2<br>
NUMA node0 CPU(s):   0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,166,168,170,172,174,176,178,180,182,184,186,188,190<br>
NUMA node1 CPU(s):   1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99,101,103,105,107,109,111,113,115,117,119,121,123,125,127,129,131,133,135,137,139,141,143,145,147,149,151,153,155,157,159,161,163,165,167,169,171,173,175,177,179,181,183,185,187,189,191</p>
<p>Versions of relevant libraries:<br>
[pip3] numpy==1.24.0<br>
[pip3] torch==2.1.0<br>
[pip3] torch_cluster==1.6.3+pt22cu121<br>
[pip3] torch-geometric==2.6.1<br>
[pip3] torch_scatter==2.1.2+pt22cu121<br>
[pip3] torch_sparse==0.6.18+pt22cu121<br>
[pip3] torch_spline_conv==1.2.2+pt22cu121<br>
[pip3] torchaudio==2.1.0<br>
[pip3] torchvision==0.16.0<br>
[pip3] triton==2.1.0<br>
[conda] blas                      1.0                         mkl<br>
[conda] cudatoolkit               10.2.89              hfd86e86_1<br>
[conda] ffmpeg                    4.3                  hf484d3e_0    pytorch<br>
[conda] libjpeg-turbo             2.0.0                h9bf148f_0    pytorch<br>
[conda] mkl                       2023.1.0         h213fc3f_46344<br>
[conda] mkl-service               2.4.0            py39h5eee18b_1<br>
[conda] mkl_fft                   1.3.10           py39h5eee18b_0<br>
[conda] mkl_random                1.2.7            py39h1128e8f_0<br>
[conda] numpy                     1.24.0                   pypi_0    pypi<br>
[conda] numpy-base                1.26.4           py39hb5e798b_0<br>
[conda] pytorch                   2.1.0           py3.9_cuda12.1_cudnn8.9.2_0    pytorch<br>
[conda] pytorch-cuda              12.1                 ha16c6d3_6    pytorch<br>
[conda] pytorch-mutex             1.0                        cuda    pytorch<br>
[conda] torch-cluster             1.6.3+pt22cu121          pypi_0    pypi<br>
[conda] torch-geometric           2.6.1                    pypi_0    pypi<br>
[conda] torch-scatter             2.1.2+pt22cu121          pypi_0    pypi<br>
[conda] torch-sparse              0.6.18+pt22cu121          pypi_0    pypi<br>
[conda] torch-spline-conv         1.2.2+pt22cu121          pypi_0    pypi<br>
[conda] torchaudio                2.4.0+cu121              pypi_0    pypi<br>
[conda] torchtriton               2.1.0                      py39    pytorch<br>
[conda] torchvision               0.19.0+cu121             pypi_0    pypi<br>
[conda] triton                    3.0.0                    pypi_0    pypi</p>
</blockquote>

HQJo: <p>Output with NCCL_DEBUG=INFO:</p>
<blockquote>
<p>oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO Bootstrap : Using eth0:10.12.222.52&lt;0&gt;<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO NET/Plugin : Plugin load (libnccl-net.so) returned 2 : libnccl-net.so: cannot open shared object file: No such file or directory<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO NET/Plugin : No plugin found, using internal implementation<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO cudaDriverVersion 12020<br>
NCCL version 2.18.5+cuda12.1<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO NET/IB : Using [0]mlx5_1:1/RoCE [1]mlx5_2:1/RoCE [2]mlx5_7:1/RoCE [3]mlx5_8:1/RoCE [4]mlx5_0:1/RoCE [5]mlx5_3:1/RoCE [6]mlx5_4:1/RoCE [7]mlx5_5:1/RoCE [8]mlx5_9:1/RoCE [9]mlx5_10:1/RoCE [10]mlx5_11:1/RoCE [RO]; OOB eth0:10.12.222.52&lt;0&gt;<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Using network IB<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO comm 0x8b7b190 rank 0 nranks 4 cudaDev 0 nvmlDev 0 busId 19000 commId 0x851328f7e9ec4837 - Init START<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Setting affinity for GPU 0 to 55555555,55555555,55555555,55555555,55555555,55555555<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO NVLS multicast support is available on dev 0<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 00/24 :    0   1   2   3<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 01/24 :    0   1   2   3<br>
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oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Trees [0] 1/-1/-1-&gt;0-&gt;-1 [1] 1/-1/-1-&gt;0-&gt;-1 [2] 1/-1/-1-&gt;0-&gt;-1 [3] 1/-1/-1-&gt;0-&gt;-1 [4] 1/-1/-1-&gt;0-&gt;-1 [5] 1/-1/-1-&gt;0-&gt;-1 [6] 1/-1/-1-&gt;0-&gt;-1 [7] 1/-1/-1-&gt;0-&gt;-1 [8] 1/-1/-1-&gt;0-&gt;-1 [9] 1/-1/-1-&gt;0-&gt;-1 [10] 1/-1/-1-&gt;0-&gt;-1 [11] 1/-1/-1-&gt;0-&gt;-1 [12] 1/-1/-1-&gt;0-&gt;-1 [13] 1/-1/-1-&gt;0-&gt;-1 [14] 1/-1/-1-&gt;0-&gt;-1 [15] 1/-1/-1-&gt;0-&gt;-1 [16] 1/-1/-1-&gt;0-&gt;-1 [17] 1/-1/-1-&gt;0-&gt;-1 [18] 1/-1/-1-&gt;0-&gt;-1 [19] 1/-1/-1-&gt;0-&gt;-1 [20] 1/-1/-1-&gt;0-&gt;-1 [21] 1/-1/-1-&gt;0-&gt;-1 [22] 1/-1/-1-&gt;0-&gt;-1 [23] 1/-1/-1-&gt;0-&gt;-1<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO P2P Chunksize set to 524288<br>
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oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 07/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 08/0 : 0[0] → 1[1] via P2P/oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO cudaDriverVersion 12020<br>
oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO Bootstrap : Using eth0:10.12.222.52&lt;0&gt;<br>
oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO NET/Plugin : Plugin load (libnccl-net.so) returned 2 : libnccl-net.so: cannot open shared object file: No such file or directory<br>
oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO NET/Plugin : No plugin found, using internal implementation<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO NET/IB : Using [0]mlx5_1:1/RoCE [1]mlx5_2:1/RoCE [2]mlx5_7:1/RoCE [3]mlx5_8:1/RoCE [4]mlx5_0:1/RoCE [5]mlx5_3:1/RoCE [6]mlx5_4:1/RoCE [7]mlx5_5:1/RoCE [8]mlx5_9:1/RoCE [9]mlx5_10:1/RoCE [10]mlx5_11:1/RoCE [RO]; OOB eth0:10.12.222.52&lt;0&gt;<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Using network IB<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO comm 0x90414a0 rank 3 nranks 4 cudaDev 3 nvmlDev 3 busId 5d000 commId 0x851328f7e9ec4837 - Init START<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Setting affinity for GPU 3 to 55555555,55555555,55555555,55555555,55555555,55555555<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO NVLS multicast support is available on dev 3<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Trees [0] -1/-1/-1-&gt;3-&gt;2 [1] -1/-1/-1-&gt;3-&gt;2 [2] -1/-1/-1-&gt;3-&gt;2 [3] -1/-1/-1-&gt;3-&gt;2 [4] -1/-1/-1-&gt;3-&gt;2 [5] -1/-1/-1-&gt;3-&gt;2 [6] -1/-1/-1-&gt;3-&gt;2 [7] -1/-1/-1-&gt;3-&gt;2 [8] -1/-1/-1-&gt;3-&gt;2 [9] -1/-1/-1-&gt;3-&gt;2 [10] -1/-1/-1-&gt;3-&gt;2 [11] -1/-1/-1-&gt;3-&gt;2 [12] -1/-1/-1-&gt;3-&gt;2 [13] -1/-1/-1-&gt;3-&gt;2 [14] -1/-1/-1-&gt;3-&gt;2 [15] -1/-1/-1-&gt;3-&gt;2 [16] -1/-1/-1-&gt;3-&gt;2 [17] -1/-1/-1-&gt;3-&gt;2 [18] -1/-1/-1-&gt;3-&gt;2 [19] -1/-1/-1-&gt;3-&gt;2 [20] -1/-1/-1-&gt;3-&gt;2 [21] -1/-1/-1-&gt;3-&gt;2 [22] -1/-1/-1-&gt;3-&gt;2 [23] -1/-1/-1-&gt;3-&gt;2<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO P2P Chunksize set to 524288<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 00/0 : 3[3] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 01/0 : 3[3] → 0[0] via P2P/IPC<br>
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oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 13/0 : 3[3] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 14/0 : 3[3] → 0[0] via P2P/IPC<br>
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oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 05/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 06/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 07/0 : 1[1] → 2[2] via P2P/IPC<br>
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oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 09/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 10/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 11/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 12/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 13/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 14/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 15/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 16/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 17/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 18/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 19/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 20/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 21/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 22/0 : 1[1] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 23/0 : 1[1] → 2[2] via P2P/IPC<br>
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oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 00/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFoitapac-prod-hgx01:2944889:2944889 [2] NCCL INFO cudaDriverVersion 12020<br>
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oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Using network IB<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO comm 0x7e72890 rank 2 nranks 4 cudaDev 2 nvmlDev 2 busId 4c000 commId 0x851328f7e9ec4837 - Init START<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Setting affinity for GPU 2 to 55555555,55555555,55555555,55555555,55555555,55555555<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO NVLS multicast support is available on dev 2<br>
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oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO P2P Chunksize set to 524288<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 00/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 01/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 02/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 03/0 : 2[2] → 3[3] via P2P/IPC<br>
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oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 07/0 : 2[2] → 3[3] via P2P/IPC<br>
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oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 09/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 10/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 11/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 12/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 13/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 14/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 15/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 16/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 17/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 18/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 19/0 : 2[2] → 3[3] via P2P/IPC<br>
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oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 21/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 22/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 23/0 : 2[2] → 3[3] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Connected all rings<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 00/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 01/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 02/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 03/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 04/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 05/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 06/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 07/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 08/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 09/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 10/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 11/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 12/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 13/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 14/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 15/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 16/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 17/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 18/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 19/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 20/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 21/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 22/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Channel 23/0 : 2[2] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO Connected all trees<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO NVLS comm 0x7e72890 headRank 2 nHeads 4 buffSize 4194304 memSize 2097152 nvlsPerRankSize 201326592 nvlsTotalSize 805306368</p>
<p>oitapac-prod-hgx01:2944889:2944938 [2] transport/nvls.cc:165 NCCL WARN Cuda failure ‘invalid argument’<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO transport/nvls.cc:324 → 1<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO init.cc:1093 → 1<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO init.cc:1358 → 1<br>
oitapac-prod-hgx01:2944889:2944938 [2] NCCL INFO group.cc:65 → 1 [Async thread]<br>
oitapac-prod-hgx01:2944889:2944889 [2] NCCL INFO group.cc:406 → 1<br>
oitapac-prod-hgx01:2944889:2944889 [2] NCCL INFO group.cc:96 → 1<br>
IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 09/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 10/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 11/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 12/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 13/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 14/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 15/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 16/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 17/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 18/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 19/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 20/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 21/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 22/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Channel 23/0 : 0[0] → 1[1] via P2P/IPC<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Connected all rings<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO Connected all trees<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO NVLS comm 0x8b7b190 headRank 0 nHeads 4 buffSize 4194304 memSize 2097152 nvlsPerRankSize 201326592 nvlsTotalSize 805306368</p>
<p>oitapac-prod-hgx01:2944887:2944933 [0] transport/nvls.cc:165 NCCL WARN Cuda failure ‘invalid argument’<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO transport/nvls.cc:324 → 1<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO init.cc:1093 → 1<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO init.cc:1358 → 1<br>
oitapac-prod-hgx01:2944887:2944933 [0] NCCL INFO group.cc:65 → 1 [Async thread]<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO group.cc:406 → 1<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO group.cc:96 → 1<br>
O Channel 01/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 02/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 03/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 04/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 05/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 06/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 07/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 08/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 09/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 10/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 11/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 12/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 13/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 14/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 15/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 16/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 17/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 18/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 19/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 20/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 21/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 22/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Channel 23/0 : 1[1] → 0[0] via P2P/IPC<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO Connected all trees<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO NVLS comm 0x878b930 headRank 1 nHeads 4 buffSize 4194304 memSize 2097152 nvlsPerRankSize 201326592 nvlsTotalSize 805306368</p>
<p>oitapac-prod-hgx01:2944888:2944939 [1] transport/nvls.cc:165 NCCL WARN Cuda failure ‘invalid argument’<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO transport/nvls.cc:324 → 1<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO init.cc:1093 → 1<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO init.cc:1358 → 1<br>
oitapac-prod-hgx01:2944888:2944939 [1] NCCL INFO group.cc:65 → 1 [Async thread]<br>
oitapac-prod-hgx01:2944888:2944888 [1] NCCL INFO group.cc:406 → 1<br>
oitapac-prod-hgx01:2944888:2944888 [1] NCCL INFO group.cc:96 → 1<br>
890:2944934 [3] NCCL INFO Channel 01/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 02/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 03/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 04/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 05/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 06/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 07/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 08/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 09/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 10/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 11/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 12/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 13/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 14/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 15/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 16/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 17/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 18/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 19/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 20/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 21/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 22/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Channel 23/0 : 3[3] → 2[2] via P2P/IPC<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO Connected all trees<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO NVLS comm 0x90414a0 headRank 3 nHeads 4 buffSize 4194304 memSize 2097152 nvlsPerRankSize 201326592 nvlsTotalSize 805306368</p>
<p>oitapac-prod-hgx01:2944890:2944934 [3] transport/nvls.cc:165 NCCL WARN Cuda failure ‘invalid argument’<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO transport/nvls.cc:324 → 1<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO init.cc:1093 → 1<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO init.cc:1358 → 1<br>
oitapac-prod-hgx01:2944890:2944934 [3] NCCL INFO group.cc:65 → 1 [Async thread]<br>
oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO group.cc:406 → 1<br>
oitapac-prod-hgx01:2944890:2944890 [3] NCCL INFO group.cc:96 → 1<br>
oitapac-prod-hgx01:2944887:2945003 [0] NCCL INFO [Service thread] Connection closed by localRank 3<br>
oitapac-prod-hgx01:2944887:2945003 [0] NCCL INFO [Service thread] Connection closed by localRank 1<br>
oitapac-prod-hgx01:2944887:2945003 [0] NCCL INFO [Service thread] Connection closed by localRank 0<br>
oitapac-prod-hgx01:2944887:2945003 [0] NCCL INFO [Service thread] Connection closed by localRank 2<br>
oitapac-prod-hgx01:2944887:2944887 [0] NCCL INFO comm 0x8b7b190 rank 0 nranks 4 cudaDev 0 busId 19000 - Abort COMPLETE<br>
oitapac-prod-hgx01:2944889:2945000 [2] NCCL INFO [Service thread] Connection closed by localRank 2<br>
oitapac-prod-hgx01:2944889:2944889 [0] NCCL INFO comm 0x7e72890 rank 2 nranks 4 cudaDev 2 busId 4c000 - Abort COMPLETE</p>
</blockquote>