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Re: likely/unlikely expressions

 

Ok, I found it!

GCC needs additional option for compiling -fprofile-generate
http://stackoverflow.com/questions/1851299/is-it-possible-to-tell-the-branch-predictor-how-likely-it-is-to-follow-the-branch
And then those examples are working.

Sorry for warning.
Anton



On Tue, Nov 30, 2010 at 11:59 AM, Anton Gladky <gladky.anton@xxxxxxxxx>wrote:

> Hi, (Vaclav)
>
> in experimental SubDomain branch
> http://bazaar.launchpad.net/~yade-dev/yade/subdomains/revision/2568<http://bazaar.launchpad.net/%7Eyade-dev/yade/subdomains/revision/2568>you are using likely/unlikely expressions, which should help to produce
> optimized code.
> But have you tried those examples? http://kerneltrap.org/node/4705
>
> As for me. in both examples the produced binary code is completely
> identical. Could you not try those?
>
> Thanks
>
> Anton
>
>

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