I am trying to follow the CUDA By Example book, and just started to try some of their examples.
The "hello world" program ran without a problem. For the following program, it compiled fine, but when I executed, I got the message:
unknown error in simple_kernel_params.cu at line 26
Line 26 is the first cudaMalloc command.
Could someone with experience provide some hints how I should troubleshoot this? Thanks a lot!
/*
* Copyright 1993-2010 NVIDIA Corporation. All rights reserved.
*
* NVIDIA Corporation and its licensors retain all intellectual property and
* proprietary rights in and to this software and related documentation.
* Any use, reproduction, disclosure, or distribution of this software
* and related documentation without an express license agreement from
* NVIDIA Corporation is strictly prohibited.
*
* Please refer to the applicable NVIDIA end user license agreement (EULA)
* associated with this source code for terms and conditions that govern
* your use of this NVIDIA software.
*
*/
#include "../common/book.h"
__global__ void add( int a, int b, int *c ) {
*c = a + b;
}
int main( void ) {
int c;
int *dev_c;
HANDLE_ERROR( cudaMalloc( (void**)&dev_c, sizeof(int) ) );
add<<<1,1>>>( 2, 7, dev_c );
HANDLE_ERROR( cudaMemcpy( &c, dev_c, sizeof(int),
cudaMemcpyDeviceToHost ) );
printf( "2 + 7 = %d\n", c );
HANDLE_ERROR( cudaFree( dev_c ) );
return 0;
}
Some ideas what might be the source of the problem:
nvidia_uvm
kernel module to be installed and loaded (see Cuda Unknown Error(ErrNo: 30) on cudaMalloc())