统一内存访问(UMA)和非统一内存访问(NUMA)之间的区别

多处理器可以分为三个共享内存模型：

1. 统一内存访问(UMA)
2. 非统一内存访问(NUMA)
3. 纯缓存访问(COMA)

统一内存访问(UMA)：
在UMA中，使用单个内存控制器。统一内存访问比非统一内存访问慢。在“统一内存访问”中，带宽是受限制或限制的，而不是非统一内存访问。统一内存访问中使用的总线有3种类型：单，多和交叉开关。它适用于通用应用程序和分时应用程序。

非统一内存访问(NUMA)：
在NUMA中，使用了不同的内存控制器。非统一内存访问比统一内存访问快。非统一内存访问适用于实时应用程序和时间紧迫的应用程序。

让我们来看看UMA和NUMA之间的区别：

S.NO	UMA	NUMA
1.	UMA stands for Uniform Memory Access.	NUMA stands for Non-uniform Memory Access.
2.	In Uniform Memory Access, Single memory controller is used.	In Non-uniform Memory Access, Different memory controller is used.
3.	Uniform Memory Access is slower than non-uniform Memory Access.	Non-uniform Memory Access is faster than uniform Memory Access.
4.	Uniform Memory Access has limited bandwidth.	Non-uniform Memory Access has more bandwidth than uniform Memory Access.
5.	Uniform Memory Access is applicable for general purpose applications and time-sharing applications.	Non-uniform Memory Access is applicable for real-time applications and time-critical applications.
6.	In uniform Memory Access, memory access time is balanced or equal.	In non-uniform Memory Access, memory access time is not equal.
7.	There are 3 types of buses used in uniform Memory Access which are: Single, Multiple and Crossbar.	While in non-uniform Memory Access, There are 2 types of buses used which are: Tree and hierarchical.