硬件预取选项,指CPU有硬件预取功能,在CPU处理指令或数据之前,它将这些指令或数据从内存预取到L2缓存中,借此减少内存读取的时间,帮助消除潜在的瓶颈,以此提高系统效能.通常情况下建议设置为Enabled.…

Intel微处理器近20年从Pentium发展到Skylake,得益于制作工艺上的巨大发展,处理器的性能得到了非常大的增强,功能模块增多,不过其指令处理pipeline的主干部分算不上有特别大的变化,更多的是为了提高指令的处理速度添加一些模块以及各模块的增强与优化. 本文会以Intel Core微处理器架构为例去了解Intel微处理器pipeline的各个功能模块. Core架构概览 上图以指令的处理流程(pipeline)的方式对Core微处理器的架构进行了划分,指令通过各个功能模块最终实现指…

转自:http://www.wowotech.net/basic_subject/meltdown.html#6596 摘要(Abstract) The security of computer systems fundamentally relies on memory isolation, e.g., kernel address ranges are marked as non-accessible and are protected from user access. In this p…

看了<计算机系统结构>.<深入理解计算机系统>.<大话处理器>等经典书籍,也在google上搜了一大堆资料,前前后后.断断续续的折腾了一个多月,终于想通了,现在把自己的思想心得记录下来,希望对有这方面困惑的朋友有些帮助. 本文主要关注以下几个问题. 什么是CPU的流水线?为什么需要流水线? 为什么需要内存屏障?在只有单个Core的CPU中是否还需要内存屏障? 什么是乱序执行?分为几种? MOB和ROB是干什么的? load buffer和store buffer的功能是…

翻译一些自己觉得有价值的材料,工作中碰到英语大多数是读,基本没有写或者翻的,翻得不好不到位的敬请指摘. 同时也附原文以供参考. http://electronics.stackexchange.com/questions/97280/trying-to-understand-fifo-in-hardware-context 翻译: Wiki定义FIFO in electronics如下: FIFO常被用于电路缓冲及计算机软硬件的流量控制.在硬件方面,FIFO主要包含一组读写指针,存储器和控制逻辑…

最近在整一台华硕笔记本,大概有5年寿命了吧,质量还行,由于系统出了问题,打算用自制U盘WinPE进去修复一下.按照个人经验,在主板设置里启用了USB启动选项,并且设置USB启动顺序为第一个,可是进系统居然报错,如下图所示. Windows failed to start. A Recent hardware or software change might be the cause. To fix the problem: 1. Insert your windows installation…

COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Operating System Design IssuesFull exploitation of a cluster hardware configuration requires some enhancements to a single-system operating system. FAILURE MANAGEMENT How…

COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION Hardware-based solutions are generally referred to as cache coherence protocols. These solutions provide dynamic recognition at run time of potential inconsistency conditi…

这个分析的起因,是由于我之前干了这两个事: [troubleshoot][archlinux][bcache] 修改linux文件系统 / 分区方案 / 做混合硬盘 / 系统转生大!手!术!(调整底层架构,不!重!装!) [archlinux][hardware] 查看SSD的使用寿命 在12月06日完成了底层硬盘的调整之后,做了如下的硬盘指标统计: /home/tong/Workspace/system/bcache [tong@T7] [:] > cat smartctl -- r4318…

硬件设计就是根据产品经理的需求PRS(Product Requirement Specification),在COGS(Cost of Goods Sale)的要求下,利用目前业界成熟的芯片方案或者技术,在规定时间内完成符合PRS功能(Function),性能(Performance),电源设计(Power Supply), 功耗(Power Consumption),散热(Thermal/Cooling),噪音(Noise),信号完整性(Signal Integrity), 电磁辐射(EMC/…

欢迎访问我的blog:http://blog.thinkinside.me 关于android中openmax中hardware decoder的调用中,整合过程比较简单.主要是对OMXCodec的封装进行调用. 这里记录一下碰到的主要的问题: 1 现象:开关几次后程序出现crash.   几台设备都有此现象,内存大的机器可以开关的次数多些,内存小的机器开关次数少.video尺寸小的可开关的次数多些,video尺寸小的可开关次数少.典型的内存泄露,而且与video decoder的解码buffe…

emulator: ERROR: x86 emulation currently requires hardware acceleration!Please ensure Intel  is properly installed and usable.CPU acceleration status: HAX keHAXMrnel module is not installed! Android Studio 1.0 已经放出来了,以后的Android平台开发激昂逐步从Eclipse向Androi…

android.hardware.Camera类及其标准接口介绍,API level 19 http://developer.android.com/reference/android/hardware/Camera.html…

http://www.cs.rochester.edu/~kshen/papers/usenix2010-li.pdf Abstract Memory hardware reliability is an indispensable part of whole-system dependability. This paper presents the collection of realistic memory hardware error traces (including transient…

Computer Systems A Programmer's Perspective Second Edition We then provide some background on digital hardware design. We describe the basic building blocks used in a processor and how they are connected together and operated. This presentation build…

Computer Systems A Programmer's Perspective Second Edition In this chapter, we take a brief look at the design of processor hardware. We study the way a hardware system can execute the instructions of a particular ISA. This view will give you a bette…

Computer Systems A Programmer's Perspective Second Edition Many computer systems place restrictions on the allowable addresses for the primitive data types, requiring that the address for some type of object must be a multiple of some value K (typica…

emulator: ERROR: Unable to load VM from snapshot. The snapshot has been saved for a different hardware configuration.   模拟器:错误:无法从虚拟机上加载快照,快照已被保存为一个不同的硬件配置.(存档错误无法读取) 解决办法: Android Virtual Device Manager -> delete AVD -> new AVD 重新创建个AVD,解决.…

Bruce Momjian POSTGRESQL is an object-relational database developed on the Internet by a group of developers spread across the globe. It is an open-source alternative to commercial databases like Oracle and Informix. POSTGRESQL was originally develop…

android源码目录下的build/envsetup.sh文件,描述编译的命令 - m:       Makes from the top of the tree.  - mm:      Builds all of the modules in the current directory.  - mmm:     Builds all of the modules in the supplied directories. 要想使用这些命令,首先需要在android源码根目录执行. build…

Original Tango programmer is a new generation of transponder programmer which is developed to cover, read, write and generate the latest transponders used in the latest vehicle immobilizer technologies. New function for reading the Kilometers, VIN an…

1. Introduction - 保护软件的安全性措施,作为值得信赖的安全锚,- 安全地生成,存储和处理安全性关键材料屏蔽任何潜在的恶意软件,?- 通过运用有效的限制硬件篡改攻击的可能性篡改保护措施,?- 加快保障措施,通过应用专门的加密硬件,- 通过应用高度优化的专用电路,而不是昂贵的通用硬件减少对大批量的安保费用. 1.2. 对比 2. Architecture 2.1. Hardware Security Building Blocks §Asymmetric crypto engine…

A Full Hardware Guide to Deep Learning Deep Learning is very computationally intensive, so you will need a fast CPU with many cores, right? Or is it maybe wasteful to buy a fast CPU? One of the worst things you can do when building a deep learning sy…

nios工程在编译通过后RUN的过程中出现Error Running Nios II Project: ‘Downloading ELF Process failed’问题原因: 1.nios2 cpu datamaster 没有和on chinp ram 连接 导致程序在系统ram上无法下载. 2.在加载SDRAM模块时应注意其参数的准确性,否则同样影响data总线数据传输导致该问题. 3.还有,在建立工程选择软核.sopcinfo文件时要注意路径,一般nios ii 新建工程时默认上一次工程…

启动安卓模拟器报错 emulator: ERROR: x86_64 emulation currently requires hardware acceleration!  CPU acceleration status:HAXM must be updated(version 1.1.1<6.0.1) 解决办法: 在android sdk 安装目录下找到 \Android\sdk\extras\intel\Hardware_Accelerated_Execution_Manager 双击int…

Firmware Warn 问题描述: 系统版本:Ubuntu 12.04 LTS. 系统启动后dmesg打印大量Firmware Warn告警信息到syslog文件中.信息如下: [Firmware Warn]: GHES: Failed to read error status block address for hardware error source: 1. [Firmware Warn]: GHES: Failed to read error status block address…

Robots.txt是一种专门用于搜索引擎网络爬虫的文件,当构造一个网站时,如果作者希望该网站的内容被搜索引擎收录,就可以在网站中创建一个纯文本文件robots.txt,在这个文件中,声明该网站不想被robot访问的部分.这样,该网站的部分或全部内容就可以不被搜索引擎收录了,或者指定搜索引擎只收录指定的内容. Heritrix在其说明文档中,表明它是一个完全遵守robots.txt协议的网络爬虫.这一点固然在宣传上起到了一定的作用.但是,在实际的网页采集过程中,这并不是一种最好的作法.因为大部分…

于BASH正在使用VTune进行Hardware Event-based Sampling Analysis 0分析: 结果(部分)例如以下: 版权声明:本文博客原创文章.博客,未经同意,不得转载.…

Source: http://learnandremember.blogspot.jp/2010_01_01_archive.html Requisites: 1) RAID protection for dataWe'll use ZFS as filesystem. RAIDZ is somewhat akin to RAID5 and should provide better performance than other types of software RAID5 with seve…

来源: http://blog.sina.com.cn/s/blog_772645ff0100s4t7.html 我的电脑是GatewayNV49C83c,酷睿i3的CPU和NV的独立显卡 Inter公司为了从AMD(ATI)和Nvidia的显卡市场中分一杯羹 竟然把自己的显卡集成到了它的CPU上,所以我现在是双显卡切换的机器 听着很炫吧,其实下面说的事情就杯具在这里了   估计很多人都发现了,打开 我的电脑 | 属性,里面会显示你的内存大小 同时后面还有一个括号里面写着“多少多少G可用”  …