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4679 Discussions

Hot spot analysis about video coding

fei__xing_h
Beginner
89 Views

Hi,I am using vtune amplifier to analyze coding efficiency about video encoding. I found the most consuming code is arithmetic coding module. In “Caller/Callee” tab, I double click the function of the core arithmetic coding which is called frequently, the time consuming of this function is showed. My question is, when the most time consuming code line is the function name line, what’s the meaning?vtune-arithmetic-intel.jpg

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4 Replies
Peter_W_Intel
Employee
89 Views

Usually it was due to compiler's issue...compiler will generate optimized code sequence for performance consideration, that didn't match original source code's order. You can click on one source line then click "Assembly" button in source view of VTune, it will display assembly code for corresponding source line.

TimP
Black Belt
89 Views

You may need options such as /debug:inline-debug-info

Bernard
Black Belt
89 Views

As @Peter said you should look at corresponding disassembled code of encoding function. Regarding the most time consumption line of code maybe it could accumulated wait time for the resources.

 

Bernard
Black Belt
89 Views

>>>Regarding the most time consumption line of code maybe it could accumulated wait time for the resources.>>>

@coolfat

You can check it by looking at Front-End stalls.

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