Courses/Computer Science/CPSC 457.F2013/Lecture Notes/ProblemOS

In this session, we considered some of the driving philosophy behind the course and began to explore what a "program" was.

We discussed the concepts of time and space multiplexing.

Notes

Not only do I want you to come out of this course with an understanding of operating systems principles and the main algorithms involved in resource management, I want you to absorb and nurture some practical skills:

• using a command line
• accessing software documentation (i.e., the man pages)
• experience using C for both user level and kernel programming (and knowing the difference in available environments)
• understanding the context in which assembly code or machine code is used by the OS for certain critical pieces of functionality
• understanding and practicing how to use assembly code to invoke system calls
• the process of configuring and building a large piece of software, including the expense of compiling real large software
• use of a version control systems (i.e., svn)
• how to write, compile, and load loadable kernel modules (LKMs)
• gaining familiarity and comfort navigating a very large code base and;
• comfort using the LXR tool to navigate such a large code base
• understand the OS environment as a confluence of several disciplines:
  • computer architecture
  • real software engineering of a complex code artifact
  • computer science concepts for managing concurrency and sets of resources
• this environment allows you to
  • study how to design and manage hardware to support complex applications
  • see the kernel as a case study of complex applications
  • put into practice some of the software programming and problem solving skills you've learned so far in your undergraduate career

In this session, we became acquainted with a few tools:

• gcc
• cat
• hexdump
• objdump -d

We used these tools to consider this program:

int main(int argc, char* argv[])
{
  int i = 0;
  i = i++ + ++i;
  return i;
}

Slides

http://www.cpsc.ucalgary.ca/~locasto/teaching/2014/CPSC457/talks/overview-2014.pdf

Scribe Notes

• s1
• s3