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Ah, I put the wrong code. Suppose,
clEnqueueTask(command, task1, 0, NULL, &eventtask1);
clEnqueueTask(command, task2, 0, NULL, &eventtask2);
clEnqueueTask(command, task3, 0, NULL, &eventtask3);
Say, Task 1 load 1 Million floats from global memory and channel pass it to task 2.
Task 2 then perform summation and channel it to Task 3
Task 3 then write back to Global memory.
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If you are using channels between the kernels, you do not need events, and probably should not use them, since the channels have synchronization built-in, and will stall the reader kernel when the channel is empty.
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