From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by yocto-www.yoctoproject.org (Postfix, from userid 118) id B273AE00874; Fri, 30 Jan 2015 05:58:15 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on yocto-www.yoctoproject.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,HTML_MESSAGE, T_FROM_12LTRDOM autolearn=ham version=3.3.1 X-Spam-HAM-Report: * -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.0 HTML_MESSAGE BODY: HTML included in message * 0.0 T_FROM_12LTRDOM From a 12-letter domain Received: from sip2-98.nexcess.net (iwavesystems.com [207.32.180.10]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id 480AEE00828 for ; Fri, 30 Jan 2015 05:58:12 -0800 (PST) Received: (qmail 14503 invoked by uid 108); 30 Jan 2015 08:58:10 -0500 Received: from unknown (HELO ?192.168.2.104?) (124.124.219.229) by sip2-98.nexcess.net with SMTP; 30 Jan 2015 08:58:10 -0500 Message-ID: <54CB8DF0.8000808@iwavesystems.com> Date: Fri, 30 Jan 2015 19:28:08 +0530 From: ansaris User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: "meta-freescale@yoctoproject.org" X-Mailman-Approved-At: Tue, 03 Feb 2015 08:58:05 -0800 Subject: iMX6 - CPU usage not able to achieve 100% X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Jan 2015 13:58:15 -0000 Content-Type: multipart/alternative; boundary="------------060001020309020401030005" --------------060001020309020401030005 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Hi, We are using imx6Q custom platform based on sabresd platform for our development with Linux 3.10.17_1.0.0-GA BSP. We have checked the CPU usage using "top" command. A simple test program running on a PC shows 100% whereas the same program running on this module (compiled with different compiler, of course) shows again 25%. Now, 25% is not hard limit, I have, albeit rarely, seen it to get to 33%, as well. Why a single core does not usually go more than 25%? Please suggest us. Thanks in advance. Thank You, Regards, Ansari --------------060001020309020401030005 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit Hi,

We are using imx6Q custom platform based on sabresd platform for our development with Linux 3.10.17_1.0.0-GA BSP.

We have checked the CPU usage using "top" command.

A simple test program running on a PC shows 100% whereas the same program running on this module (compiled with different compiler, of course) shows again 25%. Now, 25% is not hard limit, I have, albeit rarely, seen it to get to 33%, as well.

Why a single core does not usually go more than 25%?

Please suggest us. Thanks in advance.

Thank You,
Regards,
Ansari

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