void main()
// reading file size
fseek (f , 0 , SEEK_END);
lSize = ftell (f);
rewind (f);
//copying file content to array ibuffer
char * ibuffer = new char[lSize];
fread( ibuffer, lSize, 1, f );
//for (int i =0; i < lSize; i++)
//printf("%c", ibuffer[i]);
fclose( f );
char *a_h, *a_d; // Pointer to host & device arrays
a_h = (char *)malloc(lSize); // Allocate array on host
cudaMalloc((void **) &a_d, lSize); // Allocate array on device
// Initialize host array and copy it to CUDA device
for (int i=0; i<lSize; i++)
a_h[i] = ibuffer[i];
cudaMemcpy(a_d, a_h, lSize, cudaMemcpyHostToDevice);
// Retrieve result from device and store it in host array
cudaMemcpy(a_h, a_d, sizeof(char)*lSize, cudaMemcpyDeviceToHost);
//Print results
for (int i=0; i<lSize; i++)
printf("%c", a_h[i]);
// Cleanup
free(a_h); cudaFree(a_d);
}
// Please tell me what you think about the code and don’t hesitate in pointing out the bad parts.External Image
void main()
{
//long for reading file size
long lSize = 0;
FILE *f = fopen( "C:/Documents and Settings/Administrator/Desktop/Small.txt", "rb" );
// reading file size
fseek (f , 0 , SEEK_END);
lSize = ftell (f);
rewind (f);
//copying file content to array ibuffer
char * ibuffer = new char[lSize];
fread( ibuffer, lSize, 1, f );
//for (int i =0; i < lSize; i++)
//printf("%c", ibuffer[i]);
fclose( f );
char *a_h, *a_d; // Pointer to host & device arrays
a_h = (char *)malloc(lSize); // Allocate array on host
cudaMalloc((void **) &a_d, lSize); // Allocate array on device
// Initialize host array and copy it to CUDA device
for (int i=0; i<lSize; i++)
a_h[i] = ibuffer[i];
cudaMemcpy(a_d, a_h, lSize, cudaMemcpyHostToDevice);
// Retrieve result from device and store it in host array
cudaMemcpy(a_h, a_d, sizeof(char)*lSize, cudaMemcpyDeviceToHost);
//Print results
for (int i=0; i<lSize; i++)
printf("%c", a_h[i]);
// Cleanup
free(a_h); cudaFree(a_d);
}
// Please tell me what you think about the code and don’t hesitate in pointing out the bad parts.
// Thanking you all in advance External Media
I really don’t understand your target, I think that your code and your topic title is not coincide.
before read your code, I think that you directly open and read file to device global memory,
but in your case
read file to host memory → copy to device memory → do some thing->return to host memory.
is it right?
:rolleyes:
I really don’t understand your target, I think that your code and your topic title is not coincide.
before read your code, I think that you directly open and read file to device global memory,
but in your case
read file to host memory → copy to device memory → do some thing->return to host memory.
is it right?
:rolleyes:
My intention was to show the people out there how they can read files, copy them to an array using memcpy on the device, if they want send the array to a function, and then copy it back to the host and printing the content. What I am looking for in the response, is a critique to the way I did it and if it can be improved, or if reading of files can be done in any other way. :rolleyes: … Is there a way you can open and read file to device global memory directly??? :unsure:
I tried, but I unsuccessful.
If anyone else can do, It will be very interesting?
External Media
I tried, but I unsuccessful.
If anyone else can do, It will be very interesting?
External Media
thanks 4 ur effort External Media
How are able to FILE * variable? What library file r u using? Becos CUDA does not accept fstream, iostream
