0

我正在编写一个 OpenCL 程序，并在构建时收到此错误：

Build Log:
ptxas application ptx input, line 268; error   : State space mismatch between instruction and address in instruction 'ld'
ptxas application ptx input, line 269; error   : State space mismatch between instruction and address in instruction 'ld'
ptxas application ptx input, line 270; error   : State space mismatch between instruction and address in instruction 'ld'
ptxas application ptx input, line 271; error   : State space mismatch between instruction and address in instruction 'ld'
....(same error on several more lines)

相应的 ptx 行（自动生成）是：

ld.local.u32    %r1913, [demands$inst_to_cust+16];
ld.local.u32    %rl10, [demands$inst_to_cust+12];
ld.local.u32    %rl12, [demands$inst_to_cust+8];
ld.local.u32    %rl14, [demands$inst_to_cust+4];
ld.local.u32    %rl16, [demands$inst_to_cust];

这是我编写的函数：

int
demands(cl_ushort ball, cl_ushort bin,
    __global const struct problem *problem,
    __constant const struct demand *demand,
    const cl_ushort soln[BALL_MAXNUM],
    struct demand_op ops[DEMAND_MAXOPS],
    __global cl_ushort debug_data[DEBUG_LEN])
{
int i, k = demand->data[0]; 
int serv_to_rack[] = {0, 1, 1}; 
int inst_to_cust[] = {0, 0, 0, 1, 1}; 
int maxinst_per_rack[] = {2, 1}; 

int cust_num = inst_to_cust[ball];
int max = ball, min = ball, count = 1;
int max_in_rack = maxinst_per_rack[cust_num];
for (i = ball; i < NUM_BALLS; i++) {
    if (inst_to_cust[i] == ball) max = i;
    else break;
}

.....
}

错误的原因是什么？如何解决？

4

1 回答 1

1

编译器对demand结构的位置感到困惑。“状态空间”是内存类型的 ptx-talk。ld.local期望源在本地内存中，但在您的情况下，它看起来实际上在常量内存中。

我不熟悉 OpenCL，但在 CUDA 中，__constant__限定符将变量放在具有特殊缓存语义的常量内存中。它与constC++ 无关。编译器可能会因为您将它们一起使用而感到困惑。

尝试从线路__constant中删除一个或两个。const__constant const struct demand *demand

于 2012-07-03T05:16:00.523 回答