{"action":"reopened","issue":{"url":"https://api.github.com/repos/NVIDIA/nccl/issues/27","repository_url":"https://api.github.com/repos/NVIDIA/nccl","labels_url":"https://api.github.com/repos/NVIDIA/nccl/issues/27/labels{/name}","comments_url":"https://api.github.com/repos/NVIDIA/nccl/issues/27/comments","events_url":"https://api.github.com/repos/NVIDIA/nccl/issues/27/events","html_url":"https://github.com/NVIDIA/nccl/issues/27","id":158994127,"number":27,"title":"Troubleshooting help?","user":{"login":"kmatzen","id":90536,"avatar_url":"https://avatars.githubusercontent.com/u/90536?v=3","gravatar_id":"","url":"https://api.github.com/users/kmatzen","html_url":"https://github.com/kmatzen","followers_url":"https://api.github.com/users/kmatzen/followers","following_url":"https://api.github.com/users/kmatzen/following{/other_user}","gists_url":"https://api.github.com/users/kmatzen/gists{/gist_id}","starred_url":"https://api.github.com/users/kmatzen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kmatzen/subscriptions","organizations_url":"https://api.github.com/users/kmatzen/orgs","repos_url":"https://api.github.com/users/kmatzen/repos","events_url":"https://api.github.com/users/kmatzen/events{/privacy}","received_events_url":"https://api.github.com/users/kmatzen/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":5,"created_at":"2016-06-07T18:38:10Z","updated_at":"2016-06-07T23:29:32Z","closed_at":null,"body":"I followed the instructions from the readme, but I can't get the tests to run.  Is there any additional advice someone can give me?\r\n\r\n```\r\n# make CUDA_HOME=/usr/local/cuda test\r\nCompiling src/libwrap.cu            > build/obj/libwrap.o\r\nCompiling src/core.cu               > build/obj/core.o\r\nCompiling src/all_gather.cu         > build/obj/all_gather.o\r\nCompiling src/all_reduce.cu         > build/obj/all_reduce.o\r\nCompiling src/broadcast.cu          > build/obj/broadcast.o\r\nCompiling src/reduce.cu             > build/obj/reduce.o\r\nCompiling src/reduce_scatter.cu     > build/obj/reduce_scatter.o\r\nLinking   build/lib/libnccl.so.1.2.2\r\nGrabbing  src/nccl.h                > build/include/nccl.h\r\nBuilding  test/single/all_gather_test.cu > build/test/single/all_gather_test\r\nBuilding  test/single/all_reduce_test.cu > build/test/single/all_reduce_test\r\nBuilding  test/single/broadcast_test.cu > build/test/single/broadcast_test\r\nBuilding  test/single/reduce_test.cu > build/test/single/reduce_test\r\nBuilding  test/single/reduce_scatter_test.cu > build/test/single/reduce_scatter_test\r\n# export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:./build/lib\r\n# ./build/test/single/all_reduce_test\r\nError: must specify at least data size in bytes!\r\n\r\nTests nccl AllReduce with user supplied arguments.\r\n    Usage: all_reduce_test <data size in bytes> [number of GPUs] [GPU 0] [GPU 1] ...\r\n\r\n# ./build/test/single/all_reduce_test 10000000\r\nNCCL failure test/single/all_reduce_test.cu:259 'unhandled cuda error'\r\n```\r\n```\r\n# nvidia-smi\r\nTue Jun  7 18:35:23 2016\r\n+------------------------------------------------------+\r\n| NVIDIA-SMI 361.42     Driver Version: 361.42         |\r\n|-------------------------------+----------------------+----------------------+\r\n| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |\r\n| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |\r\n|===============================+======================+======================|\r\n|   0  GeForce GTX TIT...  Off  | 0000:02:00.0     Off |                  N/A |\r\n| 22%   35C    P8    15W / 250W |     23MiB / 12287MiB |      0%      Default |\r\n+-------------------------------+----------------------+----------------------+\r\n|   1  GeForce GTX TIT...  Off  | 0000:04:00.0     Off |                  N/A |\r\n| 22%   34C    P8    14W / 250W |     23MiB / 12287MiB |      0%      Default |\r\n+-------------------------------+----------------------+----------------------+\r\n|   2  GeForce GTX TIT...  Off  | 0000:83:00.0     Off |                  N/A |\r\n| 22%   34C    P8    16W / 250W |     23MiB / 12287MiB |      0%      Default |\r\n+-------------------------------+----------------------+----------------------+\r\n|   3  GeForce GTX TIT...  Off  | 0000:84:00.0     Off |                  N/A |\r\n| 22%   32C    P8    15W / 250W |     23MiB / 12287MiB |      0%      Default |\r\n+-------------------------------+----------------------+----------------------+\r\n\r\n+-----------------------------------------------------------------------------+\r\n| Processes:                                                       GPU Memory |\r\n|  GPU       PID  Type  Process name                               Usage      |\r\n|=============================================================================|\r\n|  No running processes found                                                 |\r\n+-----------------------------------------------------------------------------+\r\n```"}}
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