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Date: Tue, 18 Nov 2014 11:14:38 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: cygwin1.dll and cygstdc++-6.dll account for over 70% of application runtime cost
Message-ID: <20141118101438.GX3151@calimero.vinschen.de>
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On Nov 18 01:05, Olumide 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:
>=20
> Reposting breakdown (hopefully will be less mangled this time)
>=20
> Function                        Module           Timer samples  Timer
> samples percent
> shmat                           cygwin1.dll      36357          37.7186

You may have better results using the POSIX shared memory functions
shm_open, mmap, shm_unlink, rather than the XSI functions.  The XSI
funcs require communication with the cygserver daemon, the POSIX
functions don't.


Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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