find_pipe_by_num
event->pipe = find_pipe_by_num(payload[1]);
pipe = find_pipe_by_num(pipe_num);
find_pipe_by_num(uint32_t pipe_num);
pipe = find_pipe_by_num(pipe_num);
pipe = find_pipe_by_num(sh_css_sp_group.pipe[thread_id].pipe_num);