A query regarding printk

pmil · 11-27-2009, 01:15 PM

Hi all,

I have selected the kernel option that causes timing information to be included in printk output. Now, the problem is that I am using a printk wich includes a CR switch in order to print all printk messages into the same line. However, the timing information is not prefixed to my printk messages but only in the first printk called.

[___19.467071] THIS IS MY PRINTK! <-- That's the first call
THIS IS MY PRINTK!S IS MY PRINTK! <-- All the other printks don't have the timing prefix

Any hints?

Thanks in advance.

timmeke · 11-30-2009, 05:19 AM

Can you share the code of your printk (the one with the CR switch)?

pmil · 11-30-2009, 06:04 AM

Quote:

Originally Posted by timmeke

Can you share the code of your printk (the one with the CR switch)?

Sure! It's the following:

Code:

printk("THIS IS MY PRINTK!\r");

Thanks!

cladisch · 11-30-2009, 10:16 AM

Quote:

I am using a printk wich includes a CR switch in order to print all printk messages into the same line. However, the timing information is not prefixed to my printk messages but only in the first printk called.

printk prints the time stamp at the beginning of each new line.
As long as no \n is output, there is no new line.

pmil · 12-03-2009, 03:37 PM

Quote:

Originally Posted by cladisch

printk prints the time stamp at the beginning of each new line.
As long as no \n is output, there is no new line.

I see. So, I should find another way to do it. Thanks a lot!