<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi all:<br>the core OS services performance in any OS is critical good chips doesn't make things easier, lots of processing power (not modeled for Modula-3 language semantics) not good.<br>see s. 29, 30: core, rt, lib, sal:<br>http://web.yl.is.s.u-tokyo.ac.jp/meeting/doc/hamanaka010620.ppt<br><br>If your core is slow then it will damage the performance of your applications.<br>Thanks in advance<br><br>--- El <b>vie, 4/1/13, Darko <i><darko@darko.org></i></b> escribió:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>De: Darko <darko@darko.org><br>Asunto: Re: [M3devel] Bare Metal Modula-3<br>Para: "Daniel Alejandro Benavides D." <dabenavidesd@yahoo.es><br>CC: "m3devel developers" <m3devel@elegosoft.com><br>Fecha: viernes, 4 de enero, 2013 20:26<br><br><div
id="yiv785479406"><div><div>My understanding of a RTOS is that is provides low-latency interrupt response and accurate timing. These are not my requirements. I'm using the ARM SoC because it provides a lot of processing power at low cost and low power, two important considerations when deploying large numbers of servers.</div><div><br></div><br><div><div>On Jan 4, 2013, at 12:50 PM, Daniel Alejandro Benavides D. wrote:</div><br class="yiv785479406Apple-interchange-newline"><blockquote type="cite"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-size: inherit; line-height: inherit; font-size-adjust: inherit; font-stretch: inherit; -x-system-font: none;" valign="top">Hi all:<br>You need realtime core services otherwise your system won't
be efficient unless that's not what you want, it is to run Modula-3
applications, isn't it? If not, what's the point of your device? (e.g SPIN GC, etc)<br>
If you need a real-time core server in a networked implementation, you need a DRTOS.<br>Thanks in advance<br>
<br>
PS: I don't see any response to Jay<br>
<br><br>--- El <b>vie, 4/1/13, Darko <i><<a rel="nofollow" ymailto="mailto:darko@darko.org" target="_blank" href="/mc/compose?to=darko@darko.org">darko@darko.org</a>></i></b> escribió:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>De: Darko <<a rel="nofollow" ymailto="mailto:darko@darko.org" target="_blank" href="/mc/compose?to=darko@darko.org">darko@darko.org</a>><br>Asunto: Re: [M3devel] Bare Metal Modula-3<br>Para: "Daniel Alejandro Benavides D." <<a rel="nofollow" ymailto="mailto:dabenavidesd@yahoo.es" target="_blank" href="/mc/compose?to=dabenavidesd@yahoo.es">dabenavidesd@yahoo.es</a>><br>CC: "m3devel developers" <<a rel="nofollow" ymailto="mailto:m3devel@elegosoft.com" target="_blank" href="/mc/compose?to=m3devel@elegosoft.com">m3devel@elegosoft.com</a>><br>Fecha: viernes, 4 de enero, 2013 15:09<br><br><div id="yiv785479406"><div><div>It's not a realtime system, so
that's not a problem. Have a look at my reply to Jay you'll see a fuller description of what I have in mind.</div><div><br></div><br><div><div>On Jan 4, 2013, at 10:46 AM, Daniel Alejandro Benavides D. wrote:</div><br class="yiv785479406Apple-interchange-newline"><blockquote type="cite"><table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font-family: inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; font-size: inherit; line-height: inherit; font-size-adjust: inherit; font-stretch: inherit;" valign="top">Hi all:<br>I think you just need runtime executive on top a machine would be enough.<br>For instance VAXELN. <br>Problem is you would need realtime core services at the language level (somehow SPIN services with no protection overhead caused by language).<br>Memory managament. and threading are core services in VAXELN as part of system, just need bindings for each language.<br>I guess you need and
advanced distributed realtime system. Such was VMS 5 for rtVAX9000:<br><a rel="nofollow" target="_blank" href="http://books.google.com.co/books?id=TzUXAQAAMAAJ&dq=">http://books.google.com.co/books?id=TzUXAQAAMAAJ&dq=</a>"%2C+in+conjunction+with+VMS.+VAXELN%2C+which+provides+optimal+performance+for"&q="+which+provides+optimal+performance+for"#search_anchor<br><br>My hypothesis is that you can't bring up a realtime
application in an embedded device like you want.<br>I know of realtime OS in Modula-3, there must be several ones I guess, based on what I
have researched but you can not trust whether they are embedded, that's the problem.<br>Thanks in advance<br><br><br>--- El <b>vie, 4/1/13, Darko <i><<a rel="nofollow">darko@darko.org</a>></i></b> escribió:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>De: Darko <<a rel="nofollow">darko@darko.org</a>><br>Asunto: [M3devel] Bare Metal Modula-3<br>Para: "m3devel developers" <<a rel="nofollow">m3devel@elegosoft.com</a>><br>Fecha: viernes, 4 de enero, 2013 04:16<br><br><div class="yiv785479406plainMail">I'm interested in deploying M3 into a kind-of embedded environment where efficiency and performance are key and
I want to avoid installing an OS beyond a simple supervisor that manages the hardware. <br><br>The services needed are threading, memory allocation and network access. I'm figuring the first two already exist in M3 and a network stack can be found.<br><br>The question I have is can all of the OS specific runtime can be removed? Beyond maybe a timer
and possibly some memory protection functionality, what does M3 need to run threading and garbage collection?<br><br>- Darko<br><br></div></blockquote></td></tr></tbody></table></blockquote></div><br></div></div></blockquote></td></tr></tbody></table></blockquote></div><br></div></div></blockquote></td></tr></table>