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Exercise #12. Memory management∗

Description∗

Working with Linux memory management subsystem.

Guidance∗

Use the following names: Your.Name - as a home directory of your projects; exercise12 - as a directory of the current project; partXX - as a directory of subtask solutions (XX - subtask number); src - as a sources directory.

1⃣ Create user-space C program which tries to allocate buffers with sizes x in range from 0 to maximum possible value using functions: malloc, calloc, alloca. Measure time of each allocation/freeing: allocate memory, free memory, print results, double the amount of memory until an error occurs.

Merge request should contain the source code and the program output.

2⃣ Create kernel module and measure allocation/freeing time for functions: kmalloc, kzmalloc, vmalloc, get_free_pages. Measure the time of each allocation/freeing except. The results should be presented in a table with the following columns: buffer size, allocation time, freeing time. Size unit is 1 byte, time unit is 1 ns.

Merge request should contain the source code, Makefile and the program output from the system log.

Project Workflow
  • Fork the repo.
  • Clone that fork to a local repository.
  • Add the repo as remote to your local clone (e.g. as main).

  • Your main branch is main/your.name, you’ll share your solutions as MRs to this branch:

    • Create a branch and add commits there. Push this branch to remote: 
      git checkout -b branch_name
# add commits here
git push -u origin HEAD:branch_name
    • Create a merge request in GitLab web interface from branch_name in your fork to your.name in the repo.