【发布时间】:2019-05-03 12:38:00
【问题描述】:
以下代码给了我警告“警告:不兼容的整数到指针的转换将'__global int'传递给'__global int *'类型的参数;使用&获取地址”并且不会产生所需的结果。
import pyopencl as cl
import pyopencl.array
import pyopencl.algorithm
import numpy as np
platform = cl.get_platforms()
my_devices = platform[0].get_devices(device_type=cl.device_type.ALL)
ctx = cl.Context(devices=my_devices)
queue = cl.CommandQueue(ctx)
aryary = np.array([[10, 11, 12, 13, 14, 15, 16, 17], [1, 2, 3, 4, 0, 0, 0, 0], [108, 0, 0, 0, 0, 0, 0, 0]], np.int32)
cl_aryary = cl.array.to_device(queue, aryary)
lenary = np.array([8, 4, 1], np.int32)
cl_lenary = cl.array.to_device(queue, lenary)
result = cl.algorithm.copy_if(
cl_aryary,
"sum_array(ary[i], len[i]) == 108",
extra_args=[('len', cl_lenary)],
preamble='''
int sum_array(__global int *a, int num_elements)
{
int i, sum=0;
for (i=0; i<num_elements; i++)
{
sum = sum + a[i];
}
return(sum);
}
''',
queue=queue
)
print(result)
编辑:供参考:
https://documen.tician.de/pyopencl/algorithm.html#module-pyopencl.algorithm
【问题讨论】:
-
函数sum_array在哪里调用?我认为,有一个参数
a没有正确地作为指针或数组放入。不应该是:"sum_array(&ary[i], len[i]) == 108",吗? -
它在 "sum_array(ary[i], len[i]) == 108" 行中被调用,提交数组的每个成员都被评估为 "ary"。我在想 ary[i] 会拉出组成数组,但不确定发生了什么。多维数组正在以某种方式变平?