# 研究所 計算機組織2

:::info
* ***virtural memory 用 write back*** 不用 write through
* 用write back ***read miss will produce write***

* RISC allow designer to ***increase register set***
* RISC 較適合 pipeline
:::

## ==R-type、I-type、J-type==
:::danger
1. R-type : slt 、 **jr** 、 sll
2. I-type : lw 、 sw 、 sll
3. J-type : j 、 jal
:::

## ==branch和jump可跳的範圍==


## ==multiprogramming、multitasking、degree of multiprogramming==
:::danger
multiprogramming :

1. 如果用不到CPU就給別人用
2. 提高CPU利用率
3. 讓CPU盡量忙碌

multitasking :

1. multiprogramming的延伸
2. 加上在***多個process間經常切換***

degree of multiprogramming :

1. mem 中 process 的數量
:::

## ==long term、short term、mid term scheduler==
:::danger
* med term會將低多工度
* med term會在mem不夠時swap out、mem夠時在swap in

:::

## ==process記憶體結構==

## ==各種指令必經的路徑==


## ==k級管線可提速k倍==

## ==single cycle multi cycle clock cycle time 比較==





# ==control hazard==
## ==static branch prediction==

## ==dynamic branch prediction==




## ==branch target buffer 、branch prediction buffer、branch histary table==



## ==kernal thread的數量與idle關係==

# ==incresase ILP==

## ==increase pipeline depth==


## ==multiple issue==

## ==static multiple issue、dynamic multiple issue==

## ==各種提升ILP的方法==


## ==speculation==

## ==loop unrolling==