Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/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
Message-ID: <01c701c30f5b$1e283d20$9aea86d9@ellixia>
From: "Elfyn McBratney" <elfyn-cygwin AT exposure DOT org DOT uk>
To: "cygwin" <cygwin AT cygwin DOT com>, "Brian Ford" <ford AT vss DOT fsi DOT com>
References: <Pine DOT GSO DOT 4 DOT 44 DOT 0304301513591 DOT 18331-100000 AT eos>
Subject: Re: App w/excessive soft page faults
Date: Wed, 30 Apr 2003 21:57:12 +0100
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106

> I have an app that is generating excessive soft page faults 500-700+/sec.
> pfmon shows they happen here:
>
> SOFT: RtlTimeFieldsToTime+0x3dd : 0a7cb004
> SOFT: stricmp+0x2f6 : 0a7da3ac
>
> This pattern repeats endlessly.
>
> We probably do make a lot of time related calls, but is this page faulting
> behavior "normal"?  Any idea of how to track this back through cygwin1.dll
> and into my app?  Thanks.

First you need to compile your application with debugging symbols (the '-g'
flag to gcc/c++). Once you've done that you can start your program under gdb
like so

$ gdb /path/to/app.exe
(gdb) run [put any args here]

and you can then issue the 'bt' command to gdb to get the backtrace, or if
you suspect the problem is occurring inside the (Cygwin) DLL you can do

(gdb) dll cygwin1
(gdb) thread 1
(gdb) bt

this... I may have some of the above wrong (?).

Elfyn


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