building an OS (all streams)

Currently Playing: building my own operating system in c++ (week 110, kernel threads)

(detailed timestamps in comments) #livecoding #operatingsystem #coding welcome: https://offlinemark.com/welcome discord: https://discord.gg/P6zQBsD2ng Welcome! I’m an aspiring systems programmer. Professionally, I used to work in infosec, but now I work on music production software & hardware. I stream OS/kernel development every week for 2 hours. (I’ve done this for over 75 weeks in a row! Sundays 10a-12 ET) From February 2024 to May 2025, I streamed myself doing all the labs for MIT’s old Operating Systems Engineering course (6.828 (2018)). Through doing this, I became very familiar with JOS, which is the x86 OS used for the course. I had almost no experience with OS development when I started, although I did have much experience with programming and low level concepts. I did the coursework because I wanted to write my own OS, but felt I wasn’t ready. Now, from May 2025 to present, I’m pursuing my own learning agenda with OS development, and starting my on own OS. If this resonates with you, please subscribe and I'll see you in a stream :) 00:00:00 Start 00:02:25 Investigating kernel performance slowdown after 600 iterations 00:18:00 Discovering performance issue was CPU thermal throttling, not kernel bug 00:28:53 Planning next steps for cooperative scheduling improvements 00:39:00 Identifying critical problems with global scratch area context switching 01:10:04 Understanding interrupt safety issues in cooperative scheduling 01:38:04 Exploring re-entrancy problems and stack-based solutions 02:00:00 Advanced discussion on supporting preemption during yield operations 02:25:18 Technical implementation details and AI consultation on interrupt handling 02:33:49 Stream wrap-up and planning CLI/STI solution for next session