void master_thread(){       goto loop;   loop：   for(int i = 0; i<10; i++){       thread_sleep(1) // sleep 1 second       do log buffer flush to disk       if ( last_one_second_ios < 5% innodb_io_capacity )           do merge 5% innodb_io_capacity insert buffer       if ( buf_get_modified_ratio_pct > innodb_max_dirty_pages_pct )           do buffer pool flush 100% innodb_io_capacity dirty page       else if enable adaptive flush           do buffer pool flush desired amount dirty page       if ( no user activity )           goto backgroud loop   }   if ( last_ten_second_ios < innodb_io_capacity)       do buffer pool flush 100% innodb_io_capacity dirty page   do merge at most 5% innodb_io_capacity insert buffer   do log buffer flush to disk   do full purge   if ( buf_get_modified_ratio_pct > 70% )       do buffer pool flush 100% innodb_io_capacity dirty page   else       do buffer pool flush 10% innodb_io_capacity dirty page   do fuzzy checkpoint   goto loop   background loop:   do full purge   do merge 100% innodb_io_capacity insert buffer   if not idle:   goto loop:   else:       goto flush loop   flush loop:   do buffer pool flush 100% innodb_io_capacity dirty page   if ( buf_get_modified_ratio_pct> innodb_max_dirty_pages_pct )       go to flush loop       goto suspend loop   suspend loop:   suspend_thread()   waiting event   goto loop;   }