From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="iso-8859-1" Date: Fri, 04 Aug 2006 09:08:41 +0200 From: GSM909@domain.hid Message-ID: <20060804070841.313620@domain.hid> MIME-Version: 1.0 Subject: Re: [Xenomai-help] Time between ISR and RT Task Content-Transfer-Encoding: quoted-printable List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: gilles.chanteperdrix@xenomai.org Cc: xenomai@xenomai.org GSM909@domain.hid wrote: > Hello > > I have run a few programs with Xenomai tasks and have no problems. But I= notice that the time between ISR and RT task ( RT task is suspended and re= sumed by the ISR) is shorter when Linux have a lot of work ( average load a= round 10 ) as when Linux has nothing to do( al : 0.05 ).=20 Do you observe this for worst case, or for average case latencies? Do you o= bserve this when you boot with the idle=3Dpoll parameter ? When idle, Linux uses the 'hlt' instruction, that stops the CPU until an in= terrupt happen, maybe waking up from this state take a little bit more time= than when an interrupt is received directly? How can I set idel =3D poll ? and what are other options for idel ?=20 Regards=20 Ted --=20 Gilles Chanteperdrix. --=20 Echte DSL-Flatrate dauerhaft f=FCr 0,- Euro*. Nur noch kurze Zeit! "Feel free" mit GMX DSL: http://www.gmx.net/de/go/dsl