From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4C723504.5020809@domain.hid> Date: Mon, 23 Aug 2010 10:44:52 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4C6C019D.1040406@domain.hid> In-Reply-To: <4C6C019D.1040406@domain.hid> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] Timing calculation List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Prakash A S Cc: xenomai@xenomai.org Gilles Chanteperdrix wrote: > Prakash A S wrote: >> prakash srinivasan wrote: >> >>>>> printf(TOTAL LOOP TIMING=%ld us\n", >> >>>>> (long)((rt_timer_ticks2ns(end-start))/1000); >> >>>> What does: printf(TOTAL LOOP TIMING=%lld us\n", >> >>>> rt_timer_ticks2ns(end-start)/1000); report. >> >>> TOTAL LOOP TIMING = 5377070 us In this case, the (unsigned) >> >>> (long) (long)tart returns 1069623206 and (unsigned) (long) >> >>> (long)end returns 2151726697 >> >> Are you happy with that result? Did really pass approx. 5 seconds >> > between start and end? >> >> Could you format your mails correctly to make them readable? Use text, >> not HTML, truncate at 72 characters, and use > as a quotation mark, >> meaning that one '>' is the sign that you quote someone, two '>' is you >> quoting someone who quoted someone else, etc... I am really sorry to >> have to tell you about this, this is really basic knowledge of the >> netiquette, we should not have to tell you about it. >> >> > Definitely not and I am not confident about this output. Coz in this >> > loop period I am sending datas from client to the server. Visibly >> > noted that the server is getting all the datas within a second. So I >> > am not sure the 5 sec is the right output. I just like to know all >> > the above conversions are correct? and is it ok that the start ticks >> > can be more than the end ticks? >> >> The result of rt_timer_read is a long long, so, if you cast it to an >> unsigned, you loose the most significant bits. So, the result is totally >> meaningless. This again, is basic knowledge of the C language, we should >> not have to explain. >> >> Your bug report is quite insufficient, we do not even know what version >> of Xenomai you use, maybe you are reporting a bug which has been solved >> a long time ago. Neither do we know what version of Linux and of the >> Adoes patch you use, or the contents of your .config file. We do not >> have a self-contained example that we can run to try and reproduce your >> issue. >> >> So if you want some answers, please give us the means to answer you. >> >> >> As an community person I AGREED with what you pointed out. My main mistake was I subscribed the >> >> mailing list with an useless mailID. Now I changed my mail ID. Surely you will get the proper >> quote in future. In between the mail change, I lost the continuation for this topic and did not >> get this reply mail to my new mail ID. Simply copy and pasted the last mail from the archive. > > We still receive HTML. > >> Obviously I should improve my C language skills. >> >> I am using linux kernel 2.6.30.8 on Ubuntu 8.04, >> Adeos-ipipe-2.6.30.8-x86-2.4-09.patch and Xenomai-2.5.3 > > What about the kernel configuration and self-contained test exhibiting > the behaviour you do not understand? Prakash, ping? -- Gilles.