From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45DC42D5.9020605@domain.hid> Date: Wed, 21 Feb 2007 14:02:13 +0100 MIME-Version: 1.0 Subject: Re: [Xenomai-help] pcspeaker tsc References: <45DB5A29.9080506@domain.hid> <45DB5FC0.6060004@domain.hid> In-Reply-To: <45DB5FC0.6060004@domain.hid> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit From: Roland Tollenaar Reply-To: rolandtollenaar@domain.hid List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: Xenomai-help@domain.hid Hi, my kernel was compiled for processor family 486. If I change this I discover that I have to recompile all the modules as well. For normal kernel recompiles this is normal practice, for my live distribution it is a house load of really crappy work. So I am considering to leave my kernel in 486 state until later. My final application will only have a fastest cycle-time of 1ms and according to Philippes interpretation of my latency test read-out I should be able to achieve that easily without TSC support in the kernel. My question is, can I do this? What problems may I experience later on as a result of this choice now. I want to get some feel for the application space programming with xenomai and it does not seem worth spending forever getting this right now. Or am I wrong? Are there any settings in the kernel that will improve behaviour without the TSC support that I could or should apply? Kind regards, Roland Tollenaar. Jan Kiszka wrote: > Roland Tollenaar wrote: >> Hi >> >> I have some form of kernel recompiled in which I have the power >> management turned off. The PCspeaker is also unselected but it comes >> alive anyway. This is the result -or so it seems- of the soundcard >> driver. I would like to rmmod the sound card driver after booting if >> this interferes with xenomai but there are so many dependencies snd-this >> and snd-that, that its not trivial. >> >> -Is this sound-card driver a problem for xenomai? > > Nope. > >> -how can I be sure that the pc speaker is harmless for xenomai > > Yes, as long as you are not targeting a very low-end x86 platform (any > pre-Pentium system without TSC support). But Xenomai will warn you then > during kernel configuration. > > Jan >