cuda-sdk
および
cuda-toolkit
パッケージを使用して Arch Linux で GPGPU 開発を行っています。cuda-gdb
単純なプログラムで通常のユーザーとして実行しようとすると、次のようになります。
$ cuda-gdb ./driver
NVIDIA (R) CUDA Debugger
4.2 release
Portions Copyright (C) 2007-2012 NVIDIA Corporation
GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/nwh/Dropbox/projects/G4CU/driver...done.
(cuda-gdb) run
Starting program: /home/nwh/Dropbox/projects/G4CU/driver
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
fatal: The CUDA driver initialization failed. (error code = 1)
cuda-gdb
root として実行すると、正常に動作します。
# cuda-gdb ./driver
NVIDIA (R) CUDA Debugger
4.2 release
Portions Copyright (C) 2007-2012 NVIDIA Corporation
GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/nwh/Dropbox/work/2012-09-06-cuda_gdb/driver...done.
(cuda-gdb) run
Starting program: /home/nwh/Dropbox/work/2012-09-06-cuda_gdb/driver
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
[New Thread 0x7ffff5ba8700 (LWP 11386)]
[Context Create of context 0x6e8a30 on Device 0]
[Launch of CUDA Kernel 0 (thrust::detail::backend::cuda::detail::launch_closure_by_value<thrust::detail::backend::cuda::for_each_n_closure<thrust::device_ptr<unsigned long long>, unsigned int, thrust::detail::device_generate_functor<thrust::detail::fill_functor<unsigned long long> > > ><<<(1,1,1),(704,1,1)>>>) on Device 0]
[Launch of CUDA Kernel 1 (set_vector<<<(1,1,1),(10,1,1)>>>) on Device 0]
vd[0] = 0
vd[1] = 1
vd[2] = 2
vd[3] = 3
vd[4] = 4
vd[5] = 5
vd[6] = 6
vd[7] = 7
vd[8] = 8
vd[9] = 9
[Thread 0x7ffff5ba8700 (LWP 11386) exited]
Program exited normally.
[Termination of CUDA Kernel 1 (set_vector<<<(1,1,1),(10,1,1)>>>) on Device 0]
[Termination of CUDA Kernel 0 (thrust::detail::backend::cuda::detail::launch_closure_by_value<thrust::detail::backend::cuda::for_each_n_closure<thrust::device_ptr<unsigned long long>, unsigned int, thrust::detail::device_generate_functor<thrust::detail::fill_functor<unsigned long long> > > ><<<(1,1,1),(704,1,1)>>>) on Device 0]
テストプログラムdriver.cu
は次のとおりです。
// needed for nvcc with gcc 4.7 and iostream
#undef _GLIBCXX_ATOMIC_BUILTINS
#undef _GLIBCXX_USE_INT128
#include <iostream>
#include <thrust/device_vector.h>
#include <thrust/host_vector.h>
__global__
void set_vector(int *a)
{
// get thread id
int id = threadIdx.x + blockIdx.x * blockDim.x;
a[id] = id;
__syncthreads();
}
int main(void)
{
// settings
int len = 10; int trd = 10;
// allocate vectors
thrust::device_vector<int> vd(len);
// get the raw pointer
int *a = thrust::raw_pointer_cast(vd.data());
// call the kernel
set_vector<<<1,trd>>>(a);
// print vector
for (int i=0; i<len; i++)
std::cout << "vd[" << i << "] = " << vd[i] << std::endl;
return 0;
}
driver.c
次のコマンドでコンパイルされます。
$ nvcc -g -G -gencode arch=compute_20,code=sm_20 driver.cu -o driver
cuda-gdb
root 権限なしで実行するにはどうすればよいですか?
いくつかの詳細情報: からの出力nvidia-smi
は次のとおりです。
$ nvidia-smi
Mon Sep 10 07:16:32 2012
+------------------------------------------------------+
| NVIDIA-SMI 4.304.43 Driver Version: 304.43 |
|-------------------------------+----------------------+----------------------+
| GPU Name | Bus-Id Disp. | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Quadro FX 1700 | 0000:01:00.0 N/A | N/A |
| 60% 52C N/A N/A / N/A | 4% 20MB / 511MB | N/A Default |
+-------------------------------+----------------------+----------------------+
| 1 Tesla C2070 | 0000:02:00.0 Off | 0 |
| 30% 82C P8 N/A / N/A | 0% 11MB / 5375MB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Compute processes: GPU Memory |
| GPU PID Process name Usage |
|=============================================================================|
| 0 Not Supported |
+-----------------------------------------------------------------------------+
ディスプレイは Quadro に接続されており、Tesla で CUDA アプリケーションを実行しています。