On Thu, 2007-12-20 at 23:54 +0100, Wolfgang Woehl wrote: > Donnerstag, 20. Dezember 2007 Hans Witvliet: > > > Many years ago i used a RT-os, > > But when seeing you asking for videodrivers and vmware...... > > > > For real RT-applications, you should want to avoid unneeded IRQ's at all > > time: barebone, no graphics (but serial console), no virtualisation, no > > add-on hardware and as much as possible unneeded io on your mobo > > disabled. > > On linux kernels you can sort and prioritize IRQ's. They're called "Interrupt > requests" for a reason. > > If the realtime infrastructure is up and healthy then there's really no > reason > for your realtime applications to not deliver -- no matter what is going on > on your desktop. > > Well, the rt-application could suck, for that matter. Multiple rt-action > might > drain ressources. Hell, the metal could run hot :) And I don't know about > hardware level virtualization and its effects on irq handling. > > Wolfgang > > ps: What was the OS/application you were using?
Hm, hit the button too soon. It's not that rt-applications suck and leave no reources for "the rest", but the other way round. RT-applications, very often AV-applications, medical or control application must respond within a predefined time to a input-signal. Comes hell or high tide, no matter what, rt-applications just must. Multiple rt-actions (often re-entrant) shouldn't cause any problems. However, if you drain the available resources by non-rt-hardware, or used closed-source virtualisation, there might come a point where you can no longer prove that your application will always respond within the given time. This might cause distorted audio/video, or even loose a customer-contract. (something like: the safety-valve/medication was not released in time because the operators were playing tux-racer ;-) btw, it/s not without a reason that the developpers from asterisk seriously discourage the use of a X-environment on a pabx. But if that all does not apply, go ahead, startup gnome And as it's open, there might be a rt-xen-variant sooner than rt-extensions for vmware. hw -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
