X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:from:subject:date:message-id:references
	:mime-version:content-type:content-transfer-encoding; q=dns; s=
	default; b=vrdJpWNLSHL74Z0uJHD9lAw3aqrnuNGtRlzqiFpThAyFXzC3JErfy
	OLlN61vKjRWY0QmxLIq3WOqKuC0S0UAF3NPQ1JXZy7+cyrwRPrVte4vvJoh5gs0Y
	y/IBmDi6ujfFY/QezRUhzb2uBf6TzD2WAG145wLuD6BMvCbXAgocDI=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:to:from:subject:date:message-id:references
	:mime-version:content-type:content-transfer-encoding; s=default;
	bh=Ya2YOzv5Ya/TmIugoU/KGToGCS0=; b=xRQHrUwJXcbWbt16sM6ZC9gx281U
	vCmSL31xhP9OVJJYAqY+95fkE/wd54YEj7GtNK2R7DhKijNZysSwW5cdJHouarKR
	zZd5c2k/+ru/z24kTdQUay6SryH6i34qBvi/HaNxLDeuOm59NbwhvS1y1Hd3hbfG
	9Jd82UzbJU4vmg4=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-2.3 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2
X-HELO:	plane.gmane.org
To:	cygwin AT cygwin DOT com
From:	Mark Geisert <mark AT maxrnd DOT com>
Subject:	Re: cygwin1.dll and cygstdc++-6.dll account for over 70% of application runtime cost
Date:	Tue, 18 Nov 2014 19:27:07 +0000 (UTC)
Lines:	23
Message-ID:	<loom.20141118T201609-631@post.gmane.org>
References:	<546A96B9 DOT 5060507 AT web DOT de> <546A9B74 DOT 5020807 AT web DOT de> <546B336E DOT 6010904 AT web DOT de> <1DD30E94-585F-4096-BC50-24F8C2EC2AA4 AT cygwin DOT com>
Mime-Version:	1.0
User-Agent:	Loom/3.14 (http://gmane.org/)
X-IsSubscribed:	yes

Corinna Vinschen writes:
> On November 18, 2014 12:54:22 PM CET, Olumide wrote:
> >Thanks Corinna.
> >
> >My application does not explicitly use XSI IPC functions. It's an
> >ordinary C++ application compiled with gcc.
> 
> Your app calls shmat, either the exe or some DLL.
> 
> >BTW, are ZN4muto7releaseEP7_cygtls and ZN4muto7acquireEm also XSI
> >function?
> 
> No, these are Cygwin-internal sync methods, apperantly called quite often

I suspect it's either the IPC functions are called quite often, or the
profiler's timer interrupts are hitting so fast relative to the speed of IPC
that you're always caught on a Windows kernel call (such as an event wait)
underlying Cygwin's IPC implementation.

Looks like the OP would have to debug the app and set a breakpoint at shmat
to determine which DLL is using IPC if the app isn't.

..mark


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -