memory-usage是一个简洁且易用的命令行工具,可以快速查看系统的内存使用情况。该工具基于Linux系统的内存管理机制,通过实时监控进程的内存使用情况,为用户提供一个直观的视角。 二、使用方法 安装memory-usage 在Linux系统中,你可以使用以下命令来安装memory-usage: sudo apt-get update sudo apt-get install memory-us...
smem reports physical memory usage, taking shared memory pages into account. Unshared memory is reported as the USS (Unique Set Size). Shared memory is divided evenly among the processes sharing that memory. The unshared memory (USS) plus a process's proportion of shared memory is reported as...
%MEM -- Memory usage (RES) A task's currently used share of available physical memory VIRT -- virtual memory Thetotalamountof virtual memory used by the task.It includes all code, data and shared libraries plus pages that have been swapped out. (Note: you can define the STATSIZE=1 envi...
%MEM -- Memory usage (RES) A task's currently used share of available physical memory VIRT -- virtual memory The total amount of virtual memory used by the task. It includes all code, data and shared libraries plus pages that have been swapped out. (Note: you can define the STATSIZE=...
%MEM — Memory usage (RES) A task’s currently used share of available physical memory VIRT — virtual memory The total amount of virtual memory used by the task. It includes all code, data and shared libraries plus pages that have been swapped out. (Note: you can define the STATSIZE=...
pmap - report memory map of a process(查看进程的内存映像信息) 用法 pmap [ -x | -d ] [ -q ] pids... pmap -V 选项含义 -x extended Show the extended format. 显示扩展格式 -d device Show the deviceformat. 显示设备格式 -q quiet Do not display some header/footerlines. 不显示头尾行 ...
bool out_of_memory(struct oom_control *oc) { select_bad_process(oc); oom_kill_process(oc, "Out of memory"); } out_of_memory函数的代码逻辑还是非常简单清晰的,总共有两步,1.先选择一个要杀死的进程,2.杀死它。oom_kill_process函数的目的很简单,但是实现过程也有点复杂,这里就不展开分析了,大...
memory usage in the system. When a process is killed, the shared libraries that contributed to its PSS will be proportionally distributed to the PSS totals for the remaining processes still using that library. In this way PSS can be slightly misleading, because when a process is killed, PSS ...
虚拟内存管理(Virtual Memory Management) 在Linux 内核中,虚拟内存管理是一个非常重要的环节。Linux 采用了分页机制来进行虚拟内存的管理,它将物理内存和虚拟内存进行了分离,为每个进程提供独立的虚拟地址空间。这样做的好处是可以更好地管理内存,提高内存利用率,同时为进程提供更大的地址空间。
五、共享内存(Shared Memory) 共享内存是实现高效进程间通信的有效方式,它允许多个进程访问同一块物理内存区域。 使用场景:适合需要交换大量数据的进程。 通过本文的介绍,相信你对Linux下的各种进程间通信方式有了清晰的认识。无论你是开发者还是系统管理员,掌握这些技能将极大提升你的工作效率!