在malit760 上调用openCL的clEnqueueMapBuffer，出现CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST的错误

Hi Phenix,

I haven't encounter such kind of error before, I write a simple test, and run it on T760 and T604, both platforms cannot reproduce your problem. Would you please tell me how you create the buffer, and how you call clEnqueueMapBuffer, that would help me to locate the problem. Also, please tell me which driver version you are using. Thanks.

For clEnqueueMapBuffer(), please change the value of num_events_in_wait_list to 0, as the parameter type is cl_int, otherwise you'll get a warning.

BR,

Sheri

Hi All，

    在我把opencv ocl facedetect example 放在RK3288 Mali 上運行時都出現， 我發現用640x480圖連續11次做ocl facedetect沒問題， 但是用1698 × 1131圖 連續11次ocl facedetect時， 通常第4或5次時就會出現 CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST error  （我在trace code 都是在clEnqueueMapBuffer CL_MAP_READ 時出問題, 返回值為！CL_SUCCESS）

我的clEnqueueMapBuffer 用法如下：

cl_int *map_buffer_candidate = (cl_int*)clEnqueueMapBuffer(qu , candidatebuffer , CL_TRUE, CL_MAP_READ, 0

          , 4 * sizeof(int)*outputsz , 0, NULL, NULL, &st);

我的mali driver version為 1.4 Midgard-"r4p1-02dev0"

我想知道這問題會不會是mali driver 問題 ？

Thanks

Tse Yi Ping

这个不是bug, blocking map这类的顺序执行在我们的driver里面是通过internal dependency来实现的, 就算user没有create event,

我们也会在内部生成一个event, 挂在前面那个enqueue命令上. 所以这个failure说明用户之前有enqueue的kernel执行出错了.

可以检查一下之前是哪个出错的, 可以考虑用上events, 这样用户自己有explicit dependency, 比较方便找出是哪个出错了.

Hi phenix,

你好， 我想請問一下， 你用的ARM Board 是什麼model SOC..

Thanks

Tse Yi Ping