<div dir="ltr">Hi, Jonathan:<div><br></div><div style>Could you clarify why without budget enforcement, it will be off?</div><div style><br></div><div style>I understand that with budget enforcement, the job will be preempted when they run out of budget. When configured as NO_ENFORCEMENT, I assume the job would run to completion, as long as it has the earliest deadline. Right?</div>
<div style><br></div><div style>Also, I don't see any code to off the jobs. In the loop_for() function,</div><div style><div><span class="" style="white-space:pre"> </span>while (now + last_loop < start + exec_time) {</div>
<div><span class="" style="white-space:pre"> </span>loop_start = now;</div><div><span class="" style="white-space:pre"> </span>tmp += loop_once();</div><div><span class="" style="white-space:pre"> </span>now = cputime();</div>
<div><span class="" style="white-space:pre"> </span>last_loop = now - loop_start;</div><div><br></div><div style>Looks to me that there is no off at all.</div><div style><br></div><div style>Thanks for your help!</div><div style>
<br></div><div style>Sisu</div></div><div style><br></div><div style><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Apr 17, 2013 at 5:17 PM, Jonathan Herman <span dir="ltr"><<a href="mailto:hermanjl@cs.unc.edu" target="_blank">hermanjl@cs.unc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Disclaimer: the <2% is a guess, not a fact. I haven't measured the exact difference between rtspins WCET and actual execution time with a 1.0 scale.</div>
<div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Apr 17, 2013 at 6:16 PM, Jonathan Herman <span dir="ltr"><<a href="mailto:hermanjl@cs.unc.edu" target="_blank">hermanjl@cs.unc.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">If you use budget enforcement, then yes, that is a reasonable number for preventing WCET overruns. .98 would probably work as well. Without budget enforcement, I wouldn't worry about specifying a scale. Leave it at 1.0 as your jobs will be off by <2%.
</div><div class="gmail_extra"><div><div><br><br><div class="gmail_quote">On Wed, Apr 17, 2013 at 5:07 PM, Sisu Xi <span dir="ltr"><<a href="mailto:xisisu@gmail.com" target="_blank">xisisu@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">HI, Glenn:<div><br></div><div>Thanks for your reply.</div><div><br></div><div>If the scale is set to 1.0, which means all the overhead is *not* counted.</div><div><br></div><div>Usually what's the value for the scale parameter as a reasonable setting on a standard intel 64bit platform? 0.95?</div>
<div><br></div><div>Thanks.</div><span><font color="#888888"><div><br></div><div>Sisu</div></font></span></div><div><div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Wed, Apr 17, 2013 at 4:04 PM, Glenn Elliott <span dir="ltr"><<a href="mailto:gelliott@cs.unc.edu" target="_blank">gelliott@cs.unc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Yes. The 90% thing is out of date. Use the scale parameter.</div><div><br></div><div>-Glenn</div>
<div><div><div><br>On Apr 17, 2013, at 4:58 PM, Sisu Xi <<a href="mailto:xisisu@gmail.com" target="_blank">xisisu@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Hi, all:<div>
<br></div><div>I was reading the mailing list and found this discussion:</div><div><br></div><div><a href="https://lists.litmus-rt.org/pipermail/litmus-dev/2012/000095.html" target="_blank">https://lists.litmus-rt.org/pipermail/litmus-dev/2012/000095.html</a><br>
</div><div><br></div><div>It says rtspin cuts the wcet to 90% of its actual specified wcet.</div><div><br></div><div>Is it the same for the current release?</div><div><br></div><div>I check the code and cannot find where does this 90% coming from.</div>
<div><br></div><div>It has the "scale" variable, but is set to 1.0</div><div><br></div><div>Thanks very much!</div><div><br></div><div>Sisu</div><div><br clear="all"><div><br></div>
-- <br>Sisu Xi, PhD Candidate<br><br><a href="http://www.cse.wustl.edu/~xis/" target="_blank">http://www.cse.wustl.edu/~xis/</a><br>Department of Computer Science and Engineering<br>Campus Box 1045<br>Washington University in St. Louis<br>
One Brookings Drive<br>St. Louis, MO 63130
</div></div>
</div></blockquote></div></div><blockquote type="cite"><div><span>_______________________________________________</span><br><span>litmus-dev mailing list</span><br><span><a href="mailto:litmus-dev@lists.litmus-rt.org" target="_blank">litmus-dev@lists.litmus-rt.org</a></span><br>
<span><a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a></span><br></div></blockquote></div><br>_______________________________________________<br>
litmus-dev mailing list<br>
<a href="mailto:litmus-dev@lists.litmus-rt.org" target="_blank">litmus-dev@lists.litmus-rt.org</a><br>
<a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Sisu Xi, PhD Candidate<br><br><a href="http://www.cse.wustl.edu/~xis/" target="_blank">http://www.cse.wustl.edu/~xis/</a><br>Department of Computer Science and Engineering<br>
Campus Box 1045<br>Washington University in St. Louis<br>One Brookings Drive<br>St. Louis, MO 63130
</div>
</div></div><br>_______________________________________________<br>
litmus-dev mailing list<br>
<a href="mailto:litmus-dev@lists.litmus-rt.org" target="_blank">litmus-dev@lists.litmus-rt.org</a><br>
<a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br></div></div><span><font color="#888888">Jonathan Herman<br>Department of Computer Science at UNC Chapel Hill
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br>Jonathan Herman<br>Department of Computer Science at UNC Chapel Hill
</div>
</div></div><br>_______________________________________________<br>
litmus-dev mailing list<br>
<a href="mailto:litmus-dev@lists.litmus-rt.org">litmus-dev@lists.litmus-rt.org</a><br>
<a href="https://lists.litmus-rt.org/listinfo/litmus-dev" target="_blank">https://lists.litmus-rt.org/listinfo/litmus-dev</a><br>
<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Sisu Xi, PhD Candidate<br><br><a href="http://www.cse.wustl.edu/~xis/" target="_blank">http://www.cse.wustl.edu/~xis/</a><br>Department of Computer Science and Engineering<br>
Campus Box 1045<br>Washington University in St. Louis<br>One Brookings Drive<br>St. Louis, MO 63130
</div>