Go to print log timestamp in the Linux kernel

When compiling the Linux kernel, configure: Make Menuconfig---> Kernel hacking--PRINTK and DMESG options--Show timing information on PR Intks

When this option is selected, the kernel is started and a timestamp is prepended to the log information.

As you can see from the output below, the time is accurate to microseconds (US).

As follows:

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Uncompressing Linux ... done, booting the kernel.
[0.000000] Linux version 2.6.35.7+ ([email protected]) (GCC version 4.4.1 (sourcery g++ Lite 2010q1-202)) #109 PREEMPT M On Nov 15:11:15 CST 2011
[0.000000] cpu:arm926ej-s [41069265] revision 5 (Armv5tej), cr=00053177
[0.000000] CPU:VIVT data cache, VIVT instruction cache

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Go to print log timestamp in the Linux kernel