Tuning RT Kernel to Improve Schedule Performance with Intel Platform
summary
Tuning an upstream Linux RT kernel on Intel ADL/RPL by changing BIOS, kernel config and command line yields scheduling latency dropping from >1000 µs to about 5–10 µs. Changes include disabling CPU frequency drivers, setting idle=poll, limiting C‑states, forcing display/graphics power states, and using cpu isolation plus IRQ and timer migration tweaks. Validation runs use cyclictest, background stress (disk/CPU) and a 3D workload (JMark2) on kernel 6.6 + RT27 showing consistent low-latency results.
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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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