Just a guess : http://linux.die.net/man/2/shmat

Maybe your code needs to optimize around memory abit.

On Mon, Nov 17, 2014 at 5:05 PM, Olumide <50...@web.de> wrote:
>
> On 18/11/2014 00:45, Olumide wrote:
>>
>> According to the AMD CodeXL profiler, the modules cygwin1.dll and
>> cygstdc++-6.dll account for 65.67% and 5.13% respectively of the runtime
>> of my code. The breakdown is shown below:
>
>
> Reposting breakdown (hopefully will be less mangled this time)
>
> Function                        Module           Timer samples  Timer samples 
> percent
> shmat                           cygwin1.dll      36357          37.7186
> ZN4muto7releaseEP7_cygtls       cygwin1.dll      19539          20.2708
> ZN4muto7acquireEm               cygwin1.dll      16843          17.4738
> memmove                         cygwin1.dll      7906           8.2021
> operator new(unsigned int)      cygstdc++-6.dll  6470           6.71231
> dlfree                          cygwin1.dll      3350           3.47546
> dlmalloc                        cygwin1.dll      2519           2.61334
> malloc                          cygwin1.dll      1159           1.20241
> free                            cygwin1.dll      799            0.828924
> _gcclibcxx_demangle_callback    cygstdc++-6.dll  277            0.287374
> __wrap__ZdlPv                   cygwin1.dll      260            0.269738
> __wrap__Znwj                    cygwin1.dll      239            0.247951
> operator delete(void*)          cygstdc++-6.dll  236            0.244839
> malloc                          cygwin1.dll      216            0.22409
> free                            cygwin1.dll      213            0.220977
> tmalloc_small(malloc_state*,..) cygwin1.dll      7              0.00726216
>
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