Re: Unlikely and likely() functions....

[Avishay Traeger <atraeger@xxxxxxxxxxxxx>]

They are basically hints for the compiler, telling it whether a
condition is likely or not.  Based on this knowledge, the compiler can
optimize the code better, by doing things such as improving cache
locality for the code.

Avishay Traeger
http://www.fsl.cs.sunysb.edu/~avishay/

On Thu, 2006-01-05 at 12:21 +0530, charan raj wrote:
>  
> I am new to this mailing list .....
>  
> i just came across this  unlikely() and likely() function in kernel
> code ( eg  .. unlikely() is used in fork.c )  , i don;t have any idea
> about what the above 2 functions does ...... 
>  
> can anybody plz explain what the two functions all about .....
>  
>  
>  


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