Question

我已经安装了pyopencl。当我尝试：

 python /home/a/pyopencl/examples/benchmark.py

然后我有一个错误：

 Traceback (most recent call last):
 File "/home/a/pyopencl/examples/benchmark.py", line 6, in <module>
 import pyopencl as cl
 File "/usr/local/lib/python2.7/dist-packages/pyopencl-2013.3-py2.7-linux-   
 x86_64.egg/pyopencl/__init__.py", line 28, in <module>
 import pyopencl._cl as _cl
 ImportError: /usr/local/lib/python2.7/dist-packages/pyopencl-2013.3-py2.7-linux-     
 x86_64.egg/pyopencl/_cl.so: undefined symbol: clCreateSubDevices

我该如何解决？

TIA

 Python 2.7.5+ (default, Sep 19 2013, 13:48:49) 
 [GCC 4.8.1] on linux2
 Linux zalman 3.11.0-15-generic #23-Ubuntu SMP Mon Dec 9 18:17:04 UTC 2013 x86_64   
 x86_64 x86_64 GNU/Linux

+------------------------------------------------------+                       
| NVIDIA-SMI 4.304.88   Driver Version: 304.88         |                       
|-------------------------------+----------------------+----------------------+
| GPU  Name                     | Bus-Id        Disp.  | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap| Memory-Usage         | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GTX 770          | 0000:01:00.0     N/A |                  N/A |
| 25%   29C  N/A     N/A /  N/A |   7%  149MB / 2047MB |     N/A      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Compute processes:                                               GPU Memory |
|  GPU       PID  Process name                                     Usage      |
|=============================================================================|
|    0            Not Supported                                               |
+-----------------------------------------------------------------------------+

 ls /etc/OpenCL/vendors
 nvidia.icd



 locate libOpenCL.so


 /etc/alternatives/x86_64-linux-gnu_libOpenCL.so
 /etc/alternatives/x86_64-linux-gnu_libOpenCL.so_lib32
 /usr/lib/libOpenCL.so
 /usr/lib/x86_64-linux-gnu/libOpenCL.so
 /usr/lib32/libOpenCL.so

  nvcc --version
  nvcc: NVIDIA (R) Cuda compiler driver
  Copyright (c) 2005-2012 NVIDIA Corporation
  Built on Fri_Sep_21_17:28:58_PDT_2012
  Cuda compilation tools, release 5.0, V0.2.1221

Answer 1

clCreateSubDevices是在OCL 1.2中引入的。上次我检查NVIDIA仍然不支持OCL 1.2。也许它最近改变了......更好的检查。

您可以使用class pyopencl.Device来查询可用的OCL版本。文档here。

Answer 2

发现这个解决方案由pyopencl男子自己发布：

解决方案：添加

CL_PRETEND_VERSION =“1.1”

到siteconf.py。

问题：如果为CL 1.2提供PyOpenCL标头，然后进行编译   针对没有实现1.2功能的ICD加载器（例如   clCreateSubDevice），然后你得到这个破损。以上修正了   通过强制PyOpenCL忽略1.2。

Andreas

http://comments.gmane.org/gmane.comp.python.opencl/1328

但现在我还有另一个错误：

  File "/usr/local/lib/python2.7/dist-packages/pytools-2014.3.5-py2.7.egg/pytools/__init__.py", line 5, in <module>
from six.moves import range, zip, intern, input
ImportError: cannot import name intern

pyopencl errror：未定义的符号：clCreateSubDevices

2 个答案: