Nilly wrote: > HI All, > > I want to reduce the boot up time of android. > I have tried removing some stuff such as not required .apk from the / > system/apps folder. > from init.rc file some services which is not required. > > my kernel uncompressing is taking 11 sec almost.how can reduce > that?
See http://elinux.org/Boot_Time for a long list of different techniques for measuring and optimizing Linux booting. 11 seconds to decompress the kernel is pretty bad. Are you sure it's taking this long? It might on the emulator, but no hardware should take that long. Try turning on CONFIG_DEBUG_LL (if on an ARM platform) so the kernel messages come out on the serial console sooner. (Normally they get queued up and are not displayed exactly when produced.) Then use something like grabserial to measure boot times from the host. (This all presumes that you have a target with a serial console output.) > one thing is that i can remove the drivers which are not needed > but i am not finding any .config file to remove it? > > From where can i remove the not required driver from kernel code? Did you build the kernel? If so, the .config should be in the top level kernel directory (same directory as the MAINTAINERS file). Or, if you are using a KBUILD_OUTPUT directory, it should be in that directory. -- Tim ============================= Tim Bird Architecture Group Chair, CE Linux Forum Senior Staff Engineer, Sony Corporation of America =============================
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