X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=0.7 required=5.0 tests=AWL,BAYES_00,RCVD_NUMERIC_HELO,RP_MATCHES_RCVD,SPF_HELO_PASS
X-Spam-Check-By:	sourceware.org
To:	cygwin AT cygwin DOT com
From:	Heiko Elger <heiko_elger AT arburg DOT com>
Subject:	Slow performance Win7/64
Date:	Wed, 27 Jul 2011 11:30:58 +0000 (UTC)
Lines:	44
Message-ID:	<loom.20110727T120025-601@post.gmane.org>
Mime-Version:	1.0
User-Agent:	Loom/3.14 (http://gmane.org/)
X-IsSubscribed:	yes
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

Hello,

next time we will change our PC's from Intel Core2 Quad Core Q9550 WinXP/32 SP3
to Xeon E31275 WIN7/64 SP1.

At the moment I test the performance of our make system with cygwin 1.7-9 latest
snapshot from 2011-07-21.

I notice a very performance degree in starting/forking other executables from
within bash/make.
I found severeal postings regarding this problem and I can reproduce the problem
with a small testcase which I found in another posting.

DATE=`which date` ; { while true ; do $DATE ; done } > list.log

I count the lines in list.log with same timestamp I will get the following
timestamps per seconds:

                       XP/32              Win7/64
cygwin                  34                  12
mingw                   35                  34
MKS (eval version)     107                  99

I've searched other postings for a solution - but I cannot find one.

Using Cygwin since several years I'm very sad cause Cygwin seem to be a really
good and full implmentation of UNIX commands.

So the question is:

Is it a known problem?
Is it really OS (Win7) specific?

Why is this problem not solved - cause it is to difficult to find? Yes I know
it's open source and I'm a programmer too - but I'm realy not a programmer
having the knowledge of Cygwin internal details.

Is there a workaround for that problem?
Any hints are welcome.

best regards

Heiko



--
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 -