blocking operation

基本解釋

If a thread performs a blocking operation, the operating system will throw away its unused time slice and let other threads execute instead.
如果某個(gè)線程執(zhí)行了阻塞型的操作，操作系統(tǒng)將剝奪其未使用的剩余時(shí)間片并讓其它線程開始執(zhí)行。
coollye.blog.163.com
The ideal number is one per processor, but that implies that none of these threads should execute a blocking operation such as a synchronous read/write or a wait on an event.
理想的情況是，線程數(shù)量等于處理器的數(shù)量，不過(guò)這也要求任何線程都不應(yīng)該執(zhí)行諸如同步讀寫、等待事件通知等阻塞型的操作，以免線程阻塞。
blog.sina.com.cn
Unlocking the mutex happens immediately, but waiting on the condition mycond is normally a blocking operation, meaning that our thread will go to sleep, consuming no CPU cycles until it is woken up.
對(duì)互斥對(duì)象解鎖會(huì)立即發(fā)生，但等待條件 mycond 通常是一個(gè)阻塞操作，這意味著線程將睡眠，在它蘇醒之前不會(huì)消耗 CPU 周期。

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