#Ubiquitous quickboot how to
#Ubiquitous quickboot android
#Ubiquitous quickboot plus

#Ubiquitous quickboot plus

Not much restriction on number of writes plus access time.Īnd samsung and toshiba have already started with the release.Īnd even with better compression techniques like lzma that compresses 33% more than that of gzip.Īnd with processor's like snapdragon and hummingbird (both 1GHZ now and will be more powerful in future) that can uncompress the images faster than ever shouldn't the focuss must be given here. I agree about the memory problems in flash.īut next generation smartphones will be having SSD's. Senior Staff Engineer, Sony Network Entertainment In case people haven't seen it, there is some information at:Īrchitecture Group Chair, CE Workgroup of the Linux Foundation These are, IMHO, more difficult to work on, but have the potentialįor bigger impact (across a wider variety of platforms).

#Ubiquitous quickboot android

These are where the big time is spent in Android boot time Waits), as well as initializing zygote and preloading classes,Īnd doing the package scanning and manifest/security validation. Loading and initializing multiple daemons (some with networking However, the big problem with Android boot time is the user-space

The specific solutions working on your hardware -) Of course there's always a good amount of effort required getting Techniques for achieving boot timesįor the bootloader and kernel in the 1 to 2 second range are While improvements to bootloader performanceĪre helpful, the kernel and bootloader are not the difficult problemĪreas in Android boot time. > bootloader, creating a single stage bootloader. > stage bootloader by combining its essential features into the vendor U-boot and Barebox are examples of third stage bootloaders > main focus should be on the vendor bootloader and the third stage > In embedded systems, existing bootloaders run in three stages. I heard that mainlining the Bootloaders is not allowed. Other than XZ we can also use other technique that uncompresses image Load time of kernel from slow non-volatile memory. I also feel to remove some modules that take much time to load and are IMPROVED NEW COMPRESSION/DECOMPRESSION TECHNIQUE CALLED XZ TECHNIQUE. LZMA COMPRESSION/DECOMPRESSION TECHNIQUE AND THERE'S A SLIGHTLY # System clock should be set to highest possible stable System clock setting, RAM initialization, and configuration of NAND. # Configure only those hardware devices that are genuinely U-Boot orīarebox only duplicates these activities. # Add capability to load kernel from non-volatile memory. The single stageīootloader is small enough to run in the SRAM of 14KB on our setup and Stage bootloader by combining its essential features into the vendorīootloader, creating a single stage bootloader. Main focus should be on the vendor bootloader and the third stageīootloader. In embedded systems, existing bootloaders run in three stages. The basic idea to detail Android userspace designĬhanges to reach the home screen quickly and allow users to execute

#Ubiquitous quickboot how to

I describe an efficient bootloader design andĮxplain how to optimally configure Android’s Linux based kernel forĮmbedded systems.

I actually referred a paper and the summary of our idea is a followsįast boot is essential for consumer devices in automotive, medical andĮntertainment markets.