Linux is originally designed as a time - sharing operating system . due to its non - preemptive kernel , coarse time granularity , frequent disabled interrupt , virtual memory and other buffer mechanism , linux is not so “ real - time ” as rtos Linux的調(diào)度機(jī)制決定了它是一個分時系統(tǒng),其不可搶占的內(nèi)核、粗糙的時鐘粒度、頻繁的關(guān)中斷、虛存和其它緩沖機(jī)構(gòu)的設(shè)置,使得linux的實(shí)時性不強(qiáng)。