From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <5314CDDA.4030308@xenomai.org> Date: Mon, 03 Mar 2014 19:45:46 +0100 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <1392993075.52404.YahooMailNeo@web140605.mail.bf1.yahoo.com> <530766CD.3060707@xenomai.org> <1393198348.29895.YahooMailNeo@web140605.mail.bf1.yahoo.com> <530A862C.1060805@xenomai.org> <1393204287.98060.YahooMailNeo@web140606.mail.bf1.yahoo.com> <530B374B.1080507@xenomai.org> <1393298793.43978.YahooMailNeo@web140605.mail.bf1.yahoo.com> <530C6AC6.6030200@xenomai.org> <1393335358.33826.YahooMailNeo@web140603.mail.bf1.yahoo.com> <530C9D87.60805@xenomai.org> <1393871535.96739.YahooMailNeo@web140604.mail.bf1.yahoo.com> In-Reply-To: <1393871535.96739.YahooMailNeo@web140604.mail.bf1.yahoo.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] User Space Problems List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Bruno Tunes de Mello Cc: "xenomai@xenomai.org" On 03/03/2014 07:32 PM, Bruno Tunes de Mello wrote: > Hi Gilles, > > I did the tests you said to verify the system's behavior with load . > > I executed some tests using commands 'stress', cpuburn for Cortex A8 and dohell with LTP, for more than 20 minutes each one. > I printed 3 results using some of these tools together: http://pastebin.com/VFavnaxW > In each test it's indicated the commands used to generate load. > > It's just to confirm if it's all right. 71us may be a bit high, but have you run xeno-test and latency at the same time? xeno-test runs latency, so, if you also run the latency test separately, one latency test will perturb the results of the other. Also, something I noted on omap4, I have no explanation, but it seems latency is better on cpu 0, also, running dohell with all the options should provide a harder load. I use: xeno-test -l "dohell -s 192.168.0.5 -m /mnt -l /ltp" -c 0 -p 100 -g histo Where 192.168.0.5 has the "discard" service enabled in inetd.conf (the discard service is not enabled by default). And an USB key is mounted on /mnt. The generated "histo" files can be used with scripts/histo.gp to generate histograms like: http://sisyphus.hd.free.fr/~gilles/core-3.10-latencies/panda.png Note that since the feedback from mx6 users about the L2 "write-allocate" bit, the panda board latency dropped down to about 25us. -- Gilles.