From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 10649 invoked by alias); 20 Mar 2007 14:17:02 -0000 Received: (qmail 10611 invoked by uid 22791); 20 Mar 2007 14:16:59 -0000 X-Spam-Check-By: sourceware.org Received: from mail87.messagelabs.com (HELO mail87.messagelabs.com) (216.82.250.19) by sourceware.org (qpsmtpd/0.31) with SMTP; Tue, 20 Mar 2007 14:16:52 +0000 X-VirusChecked: Checked X-Env-Sender: js.stoezel@magellan.aero X-Msg-Ref: server-13.tower-87.messagelabs.com!1174400183!35359366!3 X-StarScan-Version: 5.5.10.7.1; banners=-,-,- Received: (qmail 25360 invoked from network); 20 Mar 2007 14:16:49 -0000 Received: from unknown (HELO on01e201.malca.ds.magellanaerospace.com) (207.49.66.160) by server-13.tower-87.messagelabs.com with SMTP; 20 Mar 2007 14:16:49 -0000 Received: from mb01e201.magellanaerospace.com ([10.1.201.2]) by on01e201.malca.ds.magellanaerospace.com with Microsoft SMTPSVC(6.0.3790.1830); Tue, 20 Mar 2007 10:14:24 -0400 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Tue, 20 Mar 2007 14:17:00 -0000 Message-ID: From: "JS Stoezel" To: Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: [ECOS] Preliminary questions on eCOS X-SW-Source: 2007-03/txt/msg00115.txt.bz2 Hello, I am interested in knowing more about eCOS. Our target CPU is a NEC V53A. This is an Intel x86 compatible with limited RAM (1Mbytes) and limited PROM (56k available for the OS). This is a 16-bit processor, however it runs in 8-bit data bus as a mean to save power. My first questions are: - In minimal mode (eCOS kernel only) - What is the PROM footprint? - What is the RAM footprint? I understand this is dependent on the number of threads running, message queues, dynamic memory allocation. Let say we want to run 3 tasks, using 4 message queues each. Same questions with File System Support. Our processor was benchmarked at 1MIPS (Sorry I do not have any details on the benchmark procedure, I do not know if this is Wheatstone, Dhrystone or other). How much overhead per context switch can we expect? Thanks, Jean-Sebastien -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss