I’m getting unspecified launch failure when executing this code:
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
__device__ uint64_t (*playground)[1<<21];
__global__ void
crash()
{
const unsigned index = (blockIdx.x<<9)|threadIdx.x;
(*playground)[index] = 0x8000010000040000ULL;
}
int
main()
{
cudaError_t err = cudaMalloc(&playground, 65 * sizeof(uint64_t) * 1<<21);
assert(err == cudaSuccess);
crash<<<4096,512>>>();
cudaThreadSynchronize();
err = cudaGetLastError();
puts(cudaGetErrorString(err));
return 0;
}
any idea why?
I’m on fedora core 12 64 bit, with 2Gb memory on the graphics card, and 4Gb on the host.
I run this test on both runlevel 3 & 5, and got the same result.
Thx.
I.