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author shivanidubey
date Fri, 21 Jun 2019 15:28:51 +0900
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1 title: Internship in University of the Ryukyus 1 title: Studying Operating System Using Docker
2 author: Shivani Dubey 2 author: Shivani Dubey
3 profile: University of the Ryukyus 3 profile: Intern, University of the Ryukyus
4 4
5 # Introduction 5 # Introduction
6 6
7 7
8 - Docker 8 - Docker
9 - xv6 9 - xv6
10 10
11
12 Why Docker? 11 Why Docker?
13 12
14 The modern platform for high velocity innovation.
15 13
14 The modern platform for high velocity innovation.
15 Docker container is not any specific platform. It can run on any computer, on any infrastructure and in any cloud.
16
17 ## Features of Docker
18
19 - Easy and Faster Configuration
20 - Increases productivity
21 - Application Isolation
22 - Swarm
23 - Routing Mesh
24 - Services
25 - Security Management
16 26
17 What is xv6? 27 What is xv6?
28
18 29
19 xv6 is modern reimplementation of Sixth Edition Unix in ANSI C. 30 xv6 is modern reimplementation of Sixth Edition Unix in ANSI C.
20 31
21 ## Scheduling processes by their priorities 32 ## Scheduling processes by their priorities
22 33
23 We added
24 34
25 ## Page 4 35
26 hi hello 36 We implemented the concept of scheduling processes by their priorities.
37
38 ```c
39 int get_highest_priority_proc(void)
40 {
41 int highest_priority;
42 int pid = 0;
43 int hpid = -1;
44 int rpid = 0;
45
46 highest_priority=100;
47 struct proc *p;
48 for(p = ptable.proc; p < &ptable.proc[NPROC]; p++, pid++){
49 if(p->state != RUNNABLE) {
50 continue;
51 }
52 rpid = pid;
53 if (highest_priority > p->priority) {
54 highest_priority=p->priority;
55 hpid = pid;
56 }
57 }
58 return hpid > 0?hpid:rpid;
59 }
60 ```
61
62
63 ## Docker Limitations
64
65
66
67 Docker environment poses some problems, some of which are difficult to comprehend.