Hi,
i have a problem with the maximum Z-dimension size of a Grid. At home i have a GTX480 with Cuda Driver Version 4.0 and i can use Grid sizes of 65536^3. At work i use a Tesla C2050 with Cuda Driver 3.2 and i can only use grids of 65536x65536x1.
Both cards have the same Compute Capability and should be able to use 3D grids. Is it a driver Issue, or is the Tesla a crippled version of the Fermi chip?
I attached the deviceQuery from the Tesla.
Thx for all helpful replies.
Device 0: “GeForce GTX 480”
CUDA Driver Version / Runtime Version 4.0 / 4.0
CUDA Capability Major/Minor version number: 2.0
Total amount of global memory: 1535 MBytes (1609760768 bytes)
(15) Multiprocessors x (32) CUDA Cores/MP: 480 CUDA Cores
GPU Clock Speed: 1.40 GHz
Memory Clock rate: 1848.00 Mhz
Memory Bus Width: 384-bit
L2 Cache Size: 786432 bytes
Max Texture Dimension Size (x,y,z) 1D=(65536), 2D=(65536,65535), 3D=(2048,2048,2048)
Max Layered Texture Size (dim) x layers 1D=(16384) x 2048, 2D=(16384,16384) x 2048
Total amount of constant memory: 65536 bytes
Total amount of shared memory per block: 49152 bytes
Total number of registers available per block: 32768
Warp size: 32
Maximum number of threads per block: 1024
Maximum sizes of each dimension of a block: 1024 x 1024 x 64
Maximum sizes of each dimension of a grid: 65535 x 65535 x 65535
Maximum memory pitch: 2147483647 bytes
Texture alignment: 512 bytes
Concurrent copy and execution: Yes with 1 copy engine(s)
Run time limit on kernels: Yes
Integrated GPU sharing Host Memory: No
Support host page-locked memory mapping: Yes
Concurrent kernel execution: Yes
Alignment requirement for Surfaces: Yes
Device has ECC support enabled: No
Device is using TCC driver mode: No
Device supports Unified Addressing (UVA): Yes
Device PCI Bus ID / PCI location ID: 2 / 0
Compute Mode:
< Default (multiple host threads can use ::cudaSetDevice() with device simultaneously) >
Device 0: “Tesla C2050”
CUDA Driver Version: 3.20
CUDA Runtime Version: 3.20
CUDA Capability Major/Minor version number: 2.0
Total amount of global memory: 2817982464 bytes
Multiprocessors x Cores/MP = Cores: 14 (MP) x 32 (Cores/MP) = 448 (Cores)
Total amount of constant memory: 65536 bytes
Total amount of shared memory per block: 49152 bytes
Total number of registers available per block: 32768
Warp size: 32
Maximum number of threads per block: 1024
Maximum sizes of each dimension of a block: 1024 x 1024 x 64
Maximum sizes of each dimension of a grid: 65535 x 65535 x 1
Maximum memory pitch: 2147483647 bytes
Texture alignment: 512 bytes
Clock rate: 1.15 GHz
Concurrent copy and execution: Yes
Run time limit on kernels: No
Integrated: No
Support host page-locked memory mapping: Yes
Compute mode: Default (multiple host threads can use this device simultaneously)
Concurrent kernel execution: Yes
Device has ECC support enabled: Yes
Device is using TCC driver mode: No
deviceQuery480.txt (3.98 KB)
deviceQuery.txt (321 Bytes)