Linux队列io 的相关内容

[帮助文档] Block IO限流增强监控接口

为了更方便地监控Linux block IO限流，Alibaba Cloud Linux 2（内核版本4.19.81-17.al7开始）和Alibaba Cloud Linux 3增加相关接口，用于增强block IO限流的监控统计能力。本文主要介绍新增接口及使用示例。

[帮助文档] 追踪IO时延

Alibaba Cloud Linux 2和Alibaba Cloud Linux 3优化了IO时延分析工具iostat的原始数据来源/proc/diskstats接口，增加了对设备侧的读、写及特殊IO（discard）等耗时的统计，此外还提供了一个方便追踪IO时延的工具bcc。本文将分别介绍优化后...

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[帮助文档] 检测文件系统和块层的IO hang

IO hang是指在系统运行过程中，因某些IO耗时过长而引起的系统不稳定甚至宕机。为了准确检测出IO hang，Alibaba Cloud Linux 2和Alibaba Cloud Linux 3扩展核心数据结构，增加了在较小的系统开销下，快速定位并检测IO hang的功能。本文主要介绍实现该功能...

[帮助文档] 如何处理Linux的ECS实例NVMe磁盘IO超时参数配置不当导致的磁盘不可用

问题描述Linux系统的阿里云ECS实例使用NVMe系统盘后，出现非预期的慢IO读写，导致系统或者应用程序对于NVMe磁盘的IO操作失败。NVMe磁盘上的文件系统从原来挂载的可读、写的状态，切换为只读不可写的状态，后续的写操作均失败，从而导致系统和应用程序异常或者业务中断。问题原因造成该问题的原因如...

linux工作队列和异步io

工作队列：内核中所有的工作队列都是由helper_wq工作队列创建的，那么helper_wq是谁创建的呢？答案是直接执行的。看一下代码： static __init int helper_init(void) { 本文转自 dog250 51C...

[arm驱动]linux等待队列阻塞中断IO的应用

《[arm驱动]linux等待队列阻塞中断IO的应用》涉及内核驱动函数四个，内核结构体零个，分析了内核驱动函数四个；可参考的相关应用程序模板或内核驱动模板一个，可参考的相关应用程序模板或内核驱动一个一、概念: 要休眠进程，必须有一个前提：有人能唤醒进程，而起这个人必须知道...

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