Member Avatar for chester1908

Hello everyone. I will try to explain my question the best way i can, however my lack of knowledge on the subject-which is the reason for this thread- may make things confusing.
I am currently working on a project for a class, which requires me to "mess around" with linux scheduler. (At this point i should say that i had never used linux till 2 months ago). Now,i will post a link which i assume is very helpful on the subject,
Click Here, but still im having trouble. I installed linsched as described,currently have its directory on my home folder, but how can i import the linsched api in my project using codeblocks, and where can i see a documentation of this api?
To make my question as simple as i can, could someone provide me with some easy steps to build a simple linsched project/test or other info, so i can understand how to use it? Thank you for your time. I hope i described my problem well, and i hope i posted it in the right topic..! thanks!

  • 2 Contributors
  • 1 Reply
  • 263 Views
  • 1 Day Discussion Span
  • Latest Post Latest Post by rch1231

Dani AI

Generated

Short, practical correction and path forward for (and a quick note for ): LinSched is a user-space simulator that hosts the Linux kernel scheduler (it lets you run the scheduler code in a user process for easy debugging), not a replacement for cron. Cron (crontab) is a time-based job launcher; it does not model or replace the kernel CPU scheduler. (kernel.googlesource.com)

Fast way to get useful hands‑on work (recommended):

  • Clone the LinSched tree (the active mirror is in the kernel trees) and work inside tools/linsched. (kernel.googlesource.com)
  • The repo already contains tests and a harness; copy or edit a test in tools/linsched/tests (see tests/basic_tests.c for patterns) and then build with make in the linsched directory. Use make run_all_tests to validate. (kernel.googlesource.com)
    This path is easier than trying to “import an API” into Code::Blocks: the test harness sets up topologies, task creation helpers and runs the simulated clock for you.

Minimal example (drop a new source into tools/linsched/tests or use as a reference in your project):

#include "linsched.h"

int main(void)
{
    struct linsched_topology topo = TOPO_QUAD_CPU;
    linsched_init(&topo);                          /* init simulator */
    struct task_data *td = linsched_create_sleep_run(50, 100);
    linsched_create_normal_task(td, 0);            /* create one task */
    linsched_run_sim(60000);                       /* run 60s simulated time */
    return 0;
}

The functions shown above are from the linsched headers and tests—use them as templates when adding your own tests or small programs. (kernel.googlesource.com)

Troubleshooting / cautions: build inside the repo (tools/linsched) with a reasonably new GCC (README suggests gcc 4.4+), run on a 64‑bit Linux userland if possible, and remember LinSched is single‑threaded simulation — it does not model lock contention or some SMP artifacts, so results focus on scheduler policy correctness rather than raw locking performance. If using Code::Blocks, either point it at the linsched sources/headers and call the repo Makefile, or edit/add files under tools/linsched/tests and use the existing Make targets. (kernel.googlesource.com)

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.