| .. _footprint: |
| |
| Optimizing for Footprint |
| ######################## |
| |
| Stack Sizes |
| *********** |
| |
| Stack sizes of various system threads are specified generously to allow for |
| usage in different scenarios on as many supported platforms as possible. You |
| should start the optimization process by reviewing all stack sizes and adjusting |
| them for your application: |
| |
| :kconfig:option:`CONFIG_ISR_STACK_SIZE` |
| Set to 2048 by default |
| |
| :kconfig:option:`CONFIG_MAIN_STACK_SIZE` |
| Set to 1024 by default |
| |
| :kconfig:option:`CONFIG_IDLE_STACK_SIZE` |
| Set to 320 by default |
| |
| :kconfig:option:`CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE` |
| Set to 1024 by default |
| |
| :kconfig:option:`CONFIG_PRIVILEGED_STACK_SIZE` |
| Set to 1024 by default, depends on userspace feature. |
| |
| |
| Unused Peripherals |
| ****************** |
| |
| Some peripherals are enabled by default. You can disable unused |
| peripherals in your project configuration, for example:: |
| |
| |
| CONFIG_GPIO=n |
| CONFIG_SPI=n |
| |
| Various Debug/Informational Options |
| *********************************** |
| |
| The following options are enabled by default to provide more information about |
| the running application and to provide means for debugging and error handling: |
| |
| :kconfig:option:`CONFIG_BOOT_BANNER` |
| This option can be disabled to save a few bytes. |
| |
| :kconfig:option:`CONFIG_DEBUG` |
| This option can be disabled for production builds |
| |
| |
| MPU/MMU Support |
| *************** |
| |
| Depending on your application and platform needs, you can disable MPU/MMU |
| support to gain some memory and improve performance. Consider the consequences |
| of this configuration choice though, because you'll lose advanced stack |
| checking and support. |
