From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gilles Chanteperdrix MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <17438.51347.702261.525919@domain.hid> Date: Mon, 20 Mar 2006 16:21:55 +0100 Subject: Re: [Xenomai-core] yet another test tool In-Reply-To: <441DD89A.4000501@domain.hid> References: <441DD89A.4000501@domain.hid> List-Id: "Xenomai life and development \(bug reports, patches, discussions\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: xenomai-core Jan Kiszka wrote: > (...)As Xenomai does not support hard-RT signal delivery yet (...) This is the next feature missing to the POSIX skin. I would like to implement this, but I am not sure which way to go : - either, if it is possible, getting Linux signals services to run in every domain at Adeos level, by replacing spinlocks with spinlocks_hw and such kind of tricks; - or adding a generic service at the adeos layer (a hook called when returning to user-space), building a generic user-space signals service at the nucleus level, and finally building all posix signals services on top of this. The first approach guarantees the best integration with Linux, but potentially add sections in Linux that are not preemptible by any Xenomai skin. With the second approach, all services related to signals have to be reimplemented plus some shortcuts to have standard user-space tools such as "kill" working. > > What do you think, is it worth including as a POSIX counterpart for > testsuite/latency? There are a few details that I do not like about this tool, but we may take it, and fix the details later. -- Gilles Chanteperdrix.