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

[Jin T. L. <jl...@co...>]

Thanks Josef!

It helps me a lot!

Jintack

On May 15, 2014, at 1:47 PM, Josef Weidendorfer <Jos...@gm...> wrote:

> 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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