Checking Device Capability

A useful command is nvidia-smi -q to display GPU info. Remember, do not use the nvidia-smi command with the -l option.

Another usefull command is deviceQuery. This tells you what features this Nvidia card supports and its CUDA Capability level. Quite often CUDA code requires a minimum capability level to run and specific features. See Checking GPU Usage for finding out the current GPU usage.

You need to be logged into a GPU node to run these commands.

GPUNode $ 
$ /usr/local/cuda-11.1/extras/demo_suite/deviceQuery

/usr/local/cuda-11.1/extras/demo_suite/deviceQuery Starting...

 CUDA Device Query (Runtime API) version (CUDART static linking)

Detected 2 CUDA Capable device(s)

Device 0: "Tesla V100S-PCIE-32GB"
  CUDA Driver Version / Runtime Version          11.1 / 11.1
  CUDA Capability Major/Minor version number:    7.0
  Total amount of global memory:                 32510 MBytes (34089730048 bytes)
  (80) Multiprocessors, ( 64) CUDA Cores/MP:     5120 CUDA Cores
  GPU Max Clock rate:                            1597 MHz (1.60 GHz)
  Memory Clock rate:                             1107 Mhz
  Memory Bus Width:                              4096-bit
  L2 Cache Size:                                 6291456 bytes
  Maximum Texture Dimension Size (x,y,z)         1D=(131072), 2D=(131072, 65536), 3D=(16384, 16384, 16384)
  Maximum Layered 1D Texture Size, (num) layers  1D=(32768), 2048 layers
  Maximum Layered 2D Texture Size, (num) layers  2D=(32768, 32768), 2048 layers
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       49152 bytes
  Total number of registers available per block: 65536
  Warp size:                                     32
  Maximum number of threads per multiprocessor:  2048
  Maximum number of threads per block:           1024
  Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
  Max dimension size of a grid size    (x,y,z): (2147483647, 65535, 65535)
  Maximum memory pitch:                          2147483647 bytes
  Texture alignment:                             512 bytes
  Concurrent copy and kernel execution:          Yes with 7 copy engine(s)
  Run time limit on kernels:                     No
  Integrated GPU sharing Host Memory:            No
  Support host page-locked memory mapping:       Yes
  Alignment requirement for Surfaces:            Yes
  Device has ECC support:                        Enabled
  Device supports Unified Addressing (UVA):      Yes
  Device supports Compute Preemption:            Yes
  Supports Cooperative Kernel Launch:            Yes
  Supports MultiDevice Co-op Kernel Launch:      Yes
  Compute Mode:
     < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >

Device 1: "Tesla V100S-PCIE-32GB"
  CUDA Driver Version / Runtime Version          11.1 / 11.1
  CUDA Capability Major/Minor version number:    7.0
  Total amount of global memory:                 32510 MBytes (34089730048 bytes)
  (80) Multiprocessors, ( 64) CUDA Cores/MP:     5120 CUDA Cores
  GPU Max Clock rate:                            1597 MHz (1.60 GHz)
  Memory Clock rate:                             1107 Mhz
  Memory Bus Width:                              4096-bit
  L2 Cache Size:                                 6291456 bytes
  Maximum Texture Dimension Size (x,y,z)         1D=(131072), 2D=(131072, 65536), 3D=(16384, 16384, 16384)
  Maximum Layered 1D Texture Size, (num) layers  1D=(32768), 2048 layers
  Maximum Layered 2D Texture Size, (num) layers  2D=(32768, 32768), 2048 layers
  Total amount of constant memory:               65536 bytes
  Total amount of shared memory per block:       49152 bytes
  Total number of registers available per block: 65536
  Warp size:                                     32
  Maximum number of threads per multiprocessor:  2048
  Maximum number of threads per block:           1024
  Max dimension size of a thread block (x,y,z): (1024, 1024, 64)
  Max dimension size of a grid size    (x,y,z): (2147483647, 65535, 65535)
  Maximum memory pitch:                          2147483647 bytes
  Texture alignment:                             512 bytes
  Concurrent copy and kernel execution:          Yes with 7 copy engine(s)
  Run time limit on kernels:                     No
  Integrated GPU sharing Host Memory:            No
  Support host page-locked memory mapping:       Yes
  Alignment requirement for Surfaces:            Yes
  Device has ECC support:                        Enabled
  Device supports Unified Addressing (UVA):      Yes
  Device supports Compute Preemption:            Yes
  Supports Cooperative Kernel Launch:            Yes
  Supports MultiDevice Co-op Kernel Launch:      Yes
  Compute Mode:
     < Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >

> Peer access from Tesla V100S-PCIE-32GB (GPU0) -> Tesla V100S-PCIE-32GB (GPU1) : Yes
> Peer access from Tesla V100S-PCIE-32GB (GPU1) -> Tesla V100S-PCIE-32GB (GPU0) : Yes

deviceQuery, CUDA Driver = CUDART, CUDA Driver Version = 11.1, CUDA Runtime Version = 11.1, NumDevs = 2, Device0 = Tesla V100S-PCIE-32GB, Device1 = Tesla V100S-PCIE-32GB
Result = PASS

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