为什么核函数执行次数会超过规定次数

雷震

       for (int i = 0; i < mbs /*等于100*/ ; i++)
        {
                n = ii[1] - ii[0]; ii++;  // n 恒等于1，因此下边的核函数应该执行100次
                MatMult_SecondLoop << <1, n >> > (i, index, n, dev_idxbase, dev_x, dev_v, dev_z);
                index += n;
        }


__global__ void MatMult_SecondLoop(int i, int index, int n, int* dev_idxbase, double* dev_x, double* dev_v, double* dev_z)
{
        int j = dev_idxbase[threadIdx.x + index];
        double x1, x2, x3;
        x1 = dev_x[3 * j];
        x2 = dev_x[3 * j + 1];
        x3 = dev_x[3 * j + 2];

        dev_z[3 * i] += dev_v[9 * (threadIdx.x + index)] * x1 + dev_v[9 * (threadIdx.x + index) + 3] * x2 + dev_v[9 * (threadIdx.x + index) + 6] * x3;
        dev_z[3 * i + 1] += dev_v[9 * (threadIdx.x + index) + 1] * x1 + dev_v[9 * (threadIdx.x + index) + 4] * x2 + dev_v[9 * (threadIdx.x + index) + 7] * x3;
        dev_z[3 * i + 2] += dev_v[9 * (threadIdx.x + index) + 2] * x1 + dev_v[9 * (threadIdx.x + index) + 5] * x2 + dev_v[9 * (threadIdx.x + index) + 8] * x3;
       
        printf("%f\n", dev_z[3 * i]);  //测试结果显示一共输出了3100次，而不是设计的100次
}