Kernel Start-up Time
bahadir at l4dev.org
Tue Jan 19 06:04:04 EST 2010
Caglar Akyuz wrote:
> While measuring Linux start-up time, I see that printing version string in
> "start_kernel" takes ~1.3 seconds. I guess this is the time between from
> "bootloader jumping to uImage" and "printing version string in generic
> start_kernel code".
> [ 4.700896] Starting kernel ...
> [ 4.702971]
> [ 5.966039] [ 0.000000] Linux version 2.6.30-davinci1-06079-g4e73fae-
This sounds like the kernel decompression is taking time. Have you tried
booting an uncompressed kernel? See if you can print on physical uart
address from files under arch/arm/boot/compressed
More information about the linux-arm-kernel