printk and kernel log

[Alexandru Juncu]

On 25 June 2013 03:02, Augusto Mecking Caringi <augustocaringi at gmail.com> wrote:
> On Mon, Jun 24, 2013 at 6:49 AM, Kevin Wilson <wkevils at gmail.com> wrote:
>> Hi,
>> When I add printk messages, and then try
>> to read /var/log/messages,
>> I see this:
>>
>> Jun 24 03:43:06 localhost kernel: [ 1858.148661] in my_func1
>> Jun 24 03:44:03 localhost kernel: [ 1915.150953] in my_func2
>>
>> What are the numbers is square brackets  ?  like [ 1858.148661]
>> or [ 1915.150953] ?
>
> Hi Kevin,
>
>     This numbers are timestamps.


To add to Augusto's answer, they are number of seconds since the kernel booted.