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我正在嘗試編寫使用OpenCL管道的OpenCL內核。內核代碼如下。使用OpenCL管道時內核掛起
uint tid = get_global_id(0);
uint numWorkItems = get_global_size(0);
int i;
int rid;
int temp = 0, temp1 = 0;
int val;
int szgr = get_local_size(0);
int lid = get_local_id(0);
for(i = tid + start_index; i < rLen; i = i + numWorkItems){
temp = 0;
val = input[i];
temp = hashTable[val - 1];
if(temp){
temp1 = projection[val - 1];
}
reserve_id_t rid1 = work_group_reserve_write_pipe(c0, szgr);
while(is_valid_reserve_id(rid1) == false){
rid1 = work_group_reserve_write_pipe(c0, szgr);
}
if(is_valid_reserve_id(rid1))
{
write_pipe(c0,rid1,lid, &temp);
work_group_commit_write_pipe(c0, rid1);
}
reserve_id_t rid2 = work_group_reserve_write_pipe(c1, szgr);
while(is_valid_reserve_id(rid2) == false){
rid2 = work_group_reserve_write_pipe(c1, szgr);
}
if(is_valid_reserve_id(rid2))
{
write_pipe(c1,rid2,lid, &temp1);
work_group_commit_write_pipe(c1, rid2);
}
}
但是,work_group_reserve_write_pipe函數總是失敗,因此內核掛起在while循環。如果我刪除這個while循環,那麼代碼不會掛起,但寫入管道不會發生。有人能告訴我爲什麼會發生這種情況嗎?
管道聲明爲_write_only管道。
請提供[mcve]。 –