title: Studying Operating System Using Docker  
author: Shivani Dubey
profile: Intern, University of the Ryukyus 

# Introduction


- Docker
- xv6

Why Docker?


The modern platform for high velocity innovation.
Docker container is not any specific platform. It can run on any computer, on any infrastructure and in any cloud.

## Features of Docker 

- Easy and Faster Configuration
- Increases productivity
- Application Isolation
- Swarm
- Routing Mesh
- Services
- Security Management

What is xv6?


xv6 is modern reimplementation of Sixth Edition Unix in ANSI C.

## Scheduling processes by their priorities



We implemented the concept of scheduling processes by their priorities. 

```c
int get_highest_priority_proc(void)
{
  int highest_priority;
  int pid = 0;
  int hpid = -1;
  int rpid = 0;

  highest_priority=100;
  struct proc *p;
  for(p = ptable.proc; p < &ptable.proc[NPROC]; p++, pid++){
    if(p->state != RUNNABLE) {
      continue;
    }
    rpid = pid;
    if (highest_priority > p->priority) {
       highest_priority=p->priority;
       hpid = pid;
    }
  }
  return hpid > 0?hpid:rpid;
}
```


## Docker Limitations



Docker environment poses some problems, some of which are difficult to comprehend.