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Linux: < 1 second into a custom gui application https://embexus.com/2017/05/16/embedded-linux-fast-boot-techniques/ https://embexus.com/2017/05/16/embedded-lin

• amelius 4y ago
  Embedded products should probably use the hibernate/suspend functionality more often. Waiting more than 2 seconds to boot/start a device is like waiting more than 2 seconds for a webpage to load ... an eternity!
  • HunterWare 4y ago
    A common use case for this is things like car/plane instruments/nav/etc. You don't want that sucking power all the time when your vehicle is parked for 1 week or two, but you do want a quick transition from POR to usable UI up and running.
    • sagarm 4y ago
      hibernate doesn't require any power; the kernel "just" restores userspace from swap instead of going through the normal boot sequence.
  • danhor 4y ago
    Hibernate has the disadvantage of needing a clean shutdown and increasing write cycles. You'd rather avoid the need to design for both. Additionally many embedded devices don't have perfect firmware and behave "weird" after a while (see planes needing a reboot every few months), which you'd extend over power cycles with this.