From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <501517EE.7060904@xenomai.org> Date: Sun, 29 Jul 2012 13:01:02 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <500FEB0F.9000308@xenomai.org> <201207282127.33575.paul_c@tuxcnc.org> <50144E93.5050109@xenomai.org> <201207291044.22418.paul_c@tuxcnc.org> In-Reply-To: <201207291044.22418.paul_c@tuxcnc.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] Heads up: I-pipe patch status on ARM List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paul Cc: "xenomai@xenomai.org" On 07/29/2012 11:44 AM, Paul wrote: > On Saturday 28 July 2012, Gilles Chanteperdrix wrote: >> It does not look that bad. However, "dohell 3600" does not do much. >> If you want to improve the latencies, use "-p 100" instead of "-p >> 1000" ;-) > > Could try running a 'make j8 Image' in the kernel source tree. That > would give the system a good run for my money.. However, dohell gives a > baseline load that others could repeat (my excuse, and I'm sticking to > it ;-p ) I agree, that is the reason we provide dohell. But what I meant is that you should use the various options to add some load (-s adds network trafic, -m adds some I/O, -l runs the whole LTP testsuite, which gives the kernel the opportunity to try and perturb xenomai with many differents paths in its code, and many different kinds of workload). > >> How do you get the fancy grid with gnuplot? We could add the option >> to scripts/histo.gp. Note that I prefer to draw graphs with a log >> scale, I find they are more meaningful, otherwise, you do not really >> see how the graph ends. > > gnuplot> set grid > > The next set of plots, I'll use a log scale as you suggest. We have been talking about this, but it would be nice to have a database somewhere with the results of a latency runs (the file generated by latency -g for instance), with some data attached (anything from a simple free from string, to a complete database record with fields such as linux version, I-pipe version, xenomai version, dohell command line), and have a way to generate graphs from several such records. I guess this could be done with a web application, using svg to avoid generating the graphs on the server. -- Gilles.