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First Day
Reminders on kernel programming
- Reminders on kernel module development
- Kernel objects
| Exercise: |
Writing a kernel module creating and using kernel objects and sets |
| Exercise: |
Interacting with a kernel module through a kernel object and the sysfs file sytem |
Power-management : APM and ACPI
- The APM standard.
- The ACPI standard.
| Exercise: |
Writing a user program to shut down the system. |
Power-management, suspend and hibernate
- Freezing tasks
- Suspend in RAM
- Suspend on Disk
- Hibernate
- Debugging power management
| Exercise: |
Writing a kernel module reacting to suspend in RAM and system wakeup |
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Second Day
Power management in drivers
- Device states vs System state
- Putting devices in low-power modes
- Power-management operations in drivers
- Controling system state changes from drivers
| Exercise: |
Adapting a device driver to put the device in suspended state when unused |
Cpu frequency governors
- The cpufreq user interface.
- The various governors available.
Idle Cpu governors
- The Idle task.
- The Idle device concept.
- CpuIdle governors.
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