A Simple OS Structure Review of “Computer Organization” Address Space Operating Systems – CSCI 402 text (code) data dynamic (heap) stack x86 Processor Bus idx regs EIP ESP EBP … seg regs CS SS … gen regs EAX EBX … other flags … 32 A0-A31 32 D0-D31 RD WR LOCK INT interrupt enabled processor mode […]
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Operating Systems – CSCI 402 Intel x86: Subroutine Code (2) local variables (8 bytes) saved registers (empty) ebp eip args sub: pushl %ebp movl %esp, %ebp subl $8, %esp movl $1, -4(%ebp) movl $0, -8(%ebp) movl -4(%ebp), %ecx movl -8(%ebp), %eax beginloop: cmpl 12(%ebp), %eax jge endloop imull 8(%ebp), %ecx addl $1, %eax jmp beginloop
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Operating Systems – CSCI 402 5.1 Threads Implementations Strategies A Simple Thread Implementation Multiple Processors 34 12 INT INT 321 0 mutex Memory 5 Copyright ý . Cheng void idle_thread() { while(1) { enqueue(runqueue, CurrentThread) thread_switch() } } yield() Operating Systems – CSCI 402 Straight-threads – Multiple Processors thread_switch() is no longer sufficient it¡¯s meant
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Operating Systems – CSCI 402 Ch 3: Basic Concepts http://merlot.usc.edu/william/usc/ 1 321 0 Copyright ý . ¡¯s Next? So far, we have talked about abstractions processes, files, threads stuff at the user level We are not ready to talk about the OS yet Next step is something in between Abstractions (processes, files, threads) context for
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Operating Systems – CSCI 402 3.4 Linking & Loading Static Linking & Loading Shared Libraries 29 321 0 Copyright ý . Systems – CSCI 402 Remember This? eip args local variables saved registers ebp main: pushl %ebp movl %esp, %ebp pushl %esi pushl %edi subl $8, %esp … pushl $1 movl -12(%ebp), %eax pushl %eax
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Operating Systems – CSCI 402 Ch 7: Memory Management http://merlot.usc.edu/william/usc/ 26 321 0 Copyright ý . Systems – CSCI 402 Memory Management Processes OS File System kernel text kernel stack other stuff kernel stack other stuff Stack Stack Challenges what to do when you run out of space? protection 321 0 Buffer Cache Networking Stack
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King’s College London This paper is part of an examination of the College counting towards the award of a degree. Examinations are governed by the College Regulations under the authority of the Academic Board. Examination Period Module Code Module Title August 2020 (Period 3) 7CCSMSEN Security Engineering Format of Examination Start time Time Allowed Instructions
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Cloud Computing INFS3208 Re-cap 1. CourseOrientation 2. HistoryandDefinitionofCloudComputing 3. BusinessDriversforcreationofCloudComputing – Capacity Planning, Cost Reduction, Organisational Agility 4. TechnologiesthatimpactCloudComputing – Clustering, Grid Computing, Virtualisation 5. CloudCharacteristics – On-demand usage, Ubiquitous access, Multitenancy, Elastic, Measurable, Resilient. CRICOS code 00025B 2 Outline • CloudDeliveryModels • CloudDeployModels • Cloud-EnablingTechnologies – Broadband Networks and Internet Architecture – Virtualisation Technology
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ECE391: Computer Systems Engineering Machine Problem 3 Fall 2021 Checkpoint 1: 5:59pm Tuesday 19 October Checkpoint 2: 5:59pm Tuesday 26 October Exam 2: TBD Checkpoint 3: 5:59pm Tuesday 9 November Checkpoint 4: 5:59pm Tuesday 16 November Thanksgiving Fall Break Checkpoint 5: 5:59pm Sunday 5 December Final Demos: TBD Contents 1 Introduction 2 Using the Group
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ECE 391, Computer Systems Engineering MP3 Checkpoint 1 Hints Fall 2021 General Guidelines This document is intended to clarify our expectations for the demo procedure. If you have any feedback to make the document more clear and concise, please let us know on Piazza. 1. During the demo, we will normally run only your tests.
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