Memory Management in LinuxNayani, AGorman, Melde Castro, R.SAbhishek Nayani, Mel Gorman, Rodrigo S. de Castro. "Memory Management in Linux". 2002.
2. Memory Management in Linux Let’s start with how Linux manages memory in the first place. Even if we generally refer to memory, there are two types of memory: physical and virtual memory. Physical memory is the main memory.This physical memory is usually Random Access Memory (RAM) and...
linux在内存管理上主要是两个概念(抽象): 分页paging:最主要的贡献是,运行物理内存不连续分配,但是在用户层面不可感知(仍然认为自己拥有独立且连续的可用内存空间) --> 通过分页+页表来实现 虚拟内存:允许可使用的内存比实际物理内存大。 --> 通过磁盘 + 页面置换来实现。 优点: 内存映射:paging之后,可以直接映射...
vmalloc area --- Linux provides a mechanism viavmalloc()where non-contiguous physically memory can be used that is contiguous in virtual memory.【见下面non-contiguous memory allocation.】 --- ---
While the virtual memory management in Linux 2.2 has decent performance for many workloads, it suffers from a number of problems. The first part of this paper contains a description of how the Linux 2.2 VMM works and an analysis of why i... RV Riel 被引量: 65发表: 2001年 Research on ...
实际地址就是virtual address + base。 OS傻瓜式操作就可以了。bounds 保证不越界提供protection。这里每个CPU都需要两个register。而管理这些内存地址的机制越来越多,需要的circuit越来越复杂,形成的unit就叫MMU memory management unit。OS 还需要在context switch切换程序的时候保存这两个register的值。
To check the PSS memory on a Linux process, we have to access the/proc/{$PID}/smapsof the process we want to check. For this, we need the PID of the process we want to check. For example, if we want to check on therabbitmq-serverprocess: ...
memory management — 物理内存如何一步加入到linux系统管理中的 注意下图 物理内存是如何加入到linux buddy伙伴子系统中的: 更详细的内容请参见我的视频课程...
1. Overview of memory management 2. The mysterious 880 MB limit on x86 3. The difference among VIRT, RES, and SHR in top output 4. The difference between buffers and cache 5. Swappiness (2.6 kernels) 1. Overview of memory management ...
This chapter delves into the area of Linux memory management, with an emphasis on techniques that are useful to the device driver writer. Many types of driver programming require some understanding of how the virtual memory subsystem works; the material we cover in this chapter comes in handy mo...