Tuning RT Kernel to Improve Schedule Performance with Intel Platform
summary
Tuning upstream RT kernel plus BIOS cuts measured cyclictest latency on Intel ADL/RPL from >1000 µs down to about 5–10 µs by combining kernel boot flags, driver disables and CPU isolation. Practical steps: disable DVFS with intel_pstate=disable and the ACPI governor, force fast wake with idle=poll, pin real‑time threads to big cores and reserve a core via isolcpus=2. Tests run on Ubuntu 22.04 + 6.6-rc/rt25 under background stress, I/O and 3D load.
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chapters (12)
- 0:00Introduction and overview
- 2:32CPU frequency management
- 4:15CPU idle state tuning
- 8:31CPU cooling and management
- 9:46Graphic driver tuning
- 14:22Core isolation strategies
- 17:16Hybrid core considerations
- 21:02Cache and hyperthreading
- 27:22Clock and timer calibration
- 36:25Debugging and trace tuning
- 38:35Test setup and results
- 42:33Discussion and conclusion
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