Re: [Valgrind-users] [callgrind] CGAL profiling error, over 100% of instruction count

[Josef W. <Jos...@gm...>]

Hi Jin,

thanks, I can reproduce it.

This is a bug in KCachegrind, and not in callgrind itself.

For some reason, the caller/callee view does not correctly
recognize this as recursive function call. It simply should
leave the cost column empty.

Simple workaround: just ignore.

Josef


Am 11.05.2014 22:55, schrieb Jin Tack Lim:
> 
> The version of valgrind: valgrind-3.9.0
> HW/OS: Macbook pro retina(core: i7), Ubuntu 12.04 on Parallels. 
> 
> Following link has the callgrind file.
> https://www.dropbox.com/s/241sovlq14nrxmi/callgrind.tar.gz
> 
> I’m not sure the function name,
> but the caller of the function is “create_internal_node_use_extension”,
> incl. is 70.73%
> This function is a directly recursive function.
> If you see the callees tab, you can see one of the callee takes 408.45%
> However, if you see call graph, this callee is disappeared.
> 
> I turned on “Relative”, “Cycle Detection”, “Relative to Parent” option
> in kcachegrind.
> 
> 
> On May 11, 2014, at 2:17 PM, John Reiser <jr...@Bi...
> <mailto:jr...@Bi...>> wrote:
> 
>>> While I was profiling CGAL4.4 Spatial searching with callgrind,
>>> I found that some function takes more than 100% of instruction. :(
>>> I compiled CGAL with -g and -O0 options.
>>>
>>> Is this common for other applications?
>>
>> No.
>>
>>> Any idea??
>>
>> Tell us which version of callgrind.
>> Tell us the name of the hardware architecture and operating system and
>> runtime library.
>> Tell us the name of the function, and the actual counts which seem bad.
>> Is there only one function with bad counts?
>> Is it directly recursive (calls itself)?
>> Is it indirectly recursive (is in a recursive loop of multiple functions)?
>>
>>
>>
>>
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> 
> 
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