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;  
}