From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4D959B95.4060006@domain.hid> Date: Fri, 01 Apr 2011 11:32:05 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-help] process on linux List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: davide doninelli Cc: xenomai@xenomai.org davide doninelli wrote: > Hi > i see in linux proces 3 xenomai processes per xenomai RT task . > I don't understand what are the first 2 process. > Is that right? What are used for? Tasks are like in envelope? > i don't find information about that. > > #ps > .... > 483 root ./interrupt_xeno_userspacen > 484 root ./interrupt_xeno_userspacen > 485 root ./interrupt_xeno_userspacen With the quantity of information you give us, we can only guess, but you probably use a linuxthreads based libc, so: - each thread appears as an entry in ps output - there is a "manager" thread called when creating the first thread. So, 483 is probably the main thread, 484 the manager thread, 485 is the "mytask" thread. Still guessing, I think you are confusing 2 + N with 3 * N, because you only tested with N == 1. -- Gilles.