【发布时间】:2011-12-28 21:15:05
【问题描述】:
安装新的 CUDA 4.0 驱动程序和 SDK 后,许多 SDK 测试失败(例如fastWalshTransform, matrixMul, reduction)。这是./deviceQuery:
Device 0: "GeForce GTX 570"
CUDA Driver Version / Runtime Version 4.0 / 4.0
CUDA Capability Major/Minor version number: 2.0
Total amount of global memory: 1279 MBytes (1341325312 bytes)
(15) Multiprocessors x (32) CUDA Cores/MP: 480 CUDA Cores
GPU Clock Speed: 1.57 GHz
Memory Clock rate: 2100.00 Mhz
Memory Bus Width: 320-bit
L2 Cache Size: 655360 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: No
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: 4 / 0
例如reduction 的输出是:
- GPU 结果 = 2135772699
- CPU 结果 = 2139353471
=> FAILED.
解决方案:这是(现在仍然是)硬件问题(驱动程序更新不能解决问题)。也许是一些内存问题,但很常见。我们有几张显示该问题的 NVIDIA 显卡(甚至是 Tesla!)。目前我们找到的唯一解决办法就是重启机器或者稍微提高电压。
【问题讨论】:
-
您能更详细地描述一下您所说的“失败”是什么意思吗?
-
@Martin:是的,例如减少的输出是:
GPU result = 2135772699,CPU result = 2139353471=>FAILED. -
您是否修改了示例?还是你运行的是默认大小?
-
@Pavan:它们完全没有受到影响。只有解压和编译,一切都是默认的。
-
GPU 或驱动程序可能有问题。重新检查驱动是否兼容..