Linux中/prc/pid/status中部分信息源码

最新推荐文章于 2022-11-24 17:17:07 发布

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最新推荐文章于 2022-11-24 17:17:07 发布 · 630 阅读

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#/proc/pid/status

本文聚焦于Linux系统中进程状态文件`/proc/pid/status`，特别是涉及内存信息的部分。通过源码分析，探讨了相关字段的含义，为理解Linux内存管理提供帮助。

/proc/pid/status中关于内存信息源码

//源码路径： /fs/proc/task_mmu.c
void task_mem(struct seq_file *m, struct mm_struct *mm)
{
   
   
	unsigned long data, text, lib, swap;
	unsigned long hiwater_vm, total_vm, hiwater_rss, total_rss;

	/*
	 * Note: to minimize their overhead, mm maintains hiwater_vm and
	 * hiwater_rss only when about to *lower* total_vm or rss.  Any
	 * collector of these hiwater stats must therefore get total_vm
	 * and rss too, which will usually be the higher.  Barriers? not
	 * worth the effort, such snapshots can always be inconsistent.
	 */
	hiwater_vm = total_vm = mm->total_vm;
	if (hiwater_vm < mm->hiwater_vm)
		hiwater_vm = mm->hiwater_vm;
	hiwater_rss = total_rss = get_mm_rss(mm