I am working on a custom embedded Linux product based on Yocto with kernel version 6.1.33, running on a Colibri iMX6 V1.1B module. My system includes several components like GStreamer, PJSIP, lighttpd, and support for hardware peripherals like serial, I2C, and others.
I’ve been focusing on boot time optimization and, after shaving down the kernel and disabling unnecessary services, I managed to reduce the boot time from 31 seconds to 19 seconds. To achieve this, I followed the Bootlin boot optimization guide and referenced the Toradex webinar: Optimizing Boot Time on Embedded Linux.
However, I would like to know:
What is a realistic and optimum boot time for a setup like mine, considering the hardware and software stack?
Are there any additional strategies or tools you’d recommend to further reduce boot time?
Any insights, suggestions, or examples of similar setups would be greatly appreciated!
Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!
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Hello,
You’ve made impressive progress in reducing your boot time from 31 to 19 seconds on your Colibri iMX6 module. For a setup like yours, achieving a boot time under 10 seconds is often considered optimal, though this can vary based on specific application requirements and hardware constraints.
Here are some additional strategies you might consider to further reduce boot time:
Systemd Optimization: Use systemd-analyze to identify and optimize the critical path of your boot process. Focus on services that take the longest to start and consider whether they can be delayed or disabled.
Parallelization: Ensure that services are configured to start in parallel where possible. This can be managed by adjusting dependencies in your systemd service files.
Kernel Optimization: Review your kernel configuration to ensure only necessary drivers and features are enabled. This can reduce the time spent in the kernel phase of booting.
Initramfs: If you are using an initramfs, ensure it is as minimal as possible, containing only the essential components needed to boot.
U-Boot Optimization: Reduce the time spent in the bootloader by minimizing the boot delay and optimizing the boot script.
Each of these strategies can contribute to reducing boot time, but the effectiveness will depend on your specific configuration and requirements. Continue to measure and analyze the impact of each change to ensure you are moving towards your boot time goals.
Best regards,
Toradex AI Assistant.
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