<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix">Hello,<br>
<br>
IMHO parallel_run is very unstable and should be considered as an
experimental feature. I never managed to make it work with
multiple arguments. The workaround is the following :<br>
<br>
function U=fct(i)<br>
U1 = R1(i) * i1(i);<br>
U2 = R2(i) * i2(i);<br>
U = [U1 U2]';<br>
endfunction<br>
<br>
n = 1000;<br>
<br>
// les vecteurs doivent etre en ligne pour la parallelisation<br>
<br>
i1 = grand(1,n,'unf',0,0.1);<br>
R1 = grand(1,n,'unf',0,500);<br>
i2 = grand(1,n,'unf',0,0.1);<br>
R2 = grand(1,n,'unf',0,1000);<br>
<br>
// using parallel_run<br>
<br>
Result = zeros(2,n); // au final, on a une matrice de dim (2xn)<br>
tic()<br>
Result = parallel_run(1:n, fct,[2,1]); // pour les n calculs, on
sont un vecteur de dim (2x1) = meme dimension que U en sortie<br>
disp(Result);<br>
time = toc(); printf("time = %g\n",time);<br>
<br>
The "1:n" trick allows to use any kind of data type, but be aware
that the mechanism of parallel_run is based on subprocess (not
threads) hence Scilab and its actual main workspace is cloned as
many times as the number of cores. This is not a problem if you
have a lot of memory...<br>
<br>
However, I don't fully understand what you meant by mixing
parallel_run and vectorization. Your original script did <br>
<br>
Result = parallel_run([R1,i1,R2,i2], fct,[2,1]); <br>
<br>
which should be (without the brackets) <br>
<br>
Result = parallel_run(R1,i1,R2,i2, fct,[2,1]); <br>
<br>
however, this syntax leads to a Scilab freeze (with 100% CPU on
all cores) : it should be ok but as I already said parallel_run is
quite buggy...<br>
<br>
Moreover the ".*" instead of "*" was not useful since fct() is
called with scalar arguments.<br>
<br>
S.<br>
<br>
Le 14/06/2016 à 14:31, Carrico, Paul a écrit :<br>
</div>
<blockquote
cite="mid:3A6B7233274DB449A2A0053A47684F953F6B4DA5@BGS-EX01.auxitrol.ad"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Monospaced;
panose-1:0 0 0 0 0 0 0 0 0 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
pre
{mso-style-priority:99;
mso-style-link:"Pr\00E9format\00E9 HTML Car";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.PrformatHTMLCar
{mso-style-name:"Pr\00E9format\00E9 HTML Car";
mso-style-priority:99;
mso-style-link:"Pr\00E9format\00E9 HTML";
font-family:"Courier New";
mso-fareast-language:FR;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1150944598;
mso-list-type:hybrid;
mso-list-template-ids:-1663370018 1008496028 67895299 67895301 67895297 67895299 67895301 67895297 67895299 67895301;}
@list l0:level1
{mso-level-start-at:0;
mso-level-number-format:bullet;
mso-level-text:-;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-font-family:Calibri;
mso-bidi-font-family:"Times New Roman";}
@list l0:level2
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level3
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level4
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level5
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level6
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
@list l0:level7
{mso-level-number-format:bullet;
mso-level-text:\F0B7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Symbol;}
@list l0:level8
{mso-level-number-format:bullet;
mso-level-text:o;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:"Courier New";}
@list l0:level9
{mso-level-number-format:bullet;
mso-level-text:\F0A7;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;
font-family:Wingdings;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">Hi again<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">In the following new
example, there’s something I do not caught ; I cannot figure
out what I’m misunderstanding<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Am I right to say that n
calculations are splitted on the available processors?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Paul<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">################################################################”<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR"
lang="EN-US">mode</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">(</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR"
lang="EN-US">0</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">)</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">;</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR"
lang="EN-US">stacksize</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">(</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR"
lang="EN-US">'max'</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">)</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">;</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR"
lang="EN-US">clear</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">;</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#B01813;mso-fareast-language:FR"
lang="EN-US">function</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<b><span style="color:#834310">U</span></b><span
style="color:#5C5C5C">=</span><u><span style="color:black">fct</span></u><span
style="color:#4A55DB">(</span><b><span
style="color:#834310">R1</span></b><span
style="color:black">,
</span><b><span style="color:#834310">i1</span></b><span
style="color:black">, </span>
<b><span style="color:#834310">R2</span></b><span
style="color:black">, </span><b><span
style="color:#834310">i2</span></b><span
style="color:#4A55DB">)</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:black">U1</span> <span
style="color:#5C5C5C">=</span> <b><span
style="color:#834310">R1</span></b><span
style="color:#5C5C5C">.</span>
<span style="color:#5C5C5C">*</span> <b><span
style="color:#834310">i1</span></b><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:black">U2</span> <span
style="color:#5C5C5C">=</span> <b><span
style="color:#834310">R2</span></b><span
style="color:#5C5C5C">.</span>
<span style="color:#5C5C5C">*</span> <b><span
style="color:#834310">i2</span></b><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<b><span style="color:#834310">U</span></b> <span
style="color:#5C5C5C">=</span> <span
style="color:#4A55DB">
[</span><span style="color:black">U1</span> <span
style="color:black">U2</span><span style="color:#4A55DB">]</span><span
style="color:#5C5C5C">'</span><span style="color:black">;</span>
<i><span style="color:#64AE64">// matrice (2x1) a chaque
iteration apres tansposition
</span></i><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"> </span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR"
lang="EN-US">clear</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:rosybrown">U1</span><span
style="color:black">;</span> <span style="color:#32B9B9">
clear</span> <span style="color:rosybrown">U2</span><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#B01813;mso-fareast-language:FR"
lang="EN-US">endfunction</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">n</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <span
style="color:rosybrown">1000</span><span
style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">//
les vecteurs doivent etre en ligne pour la parallelisation</span></i><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">i1</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">grand</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">1</span><span style="color:black">,n,</span><span
style="color:rosybrown">'unf'</span><span
style="color:black">,</span><span style="color:rosybrown">0</span><span
style="color:black">,</span><span style="color:rosybrown">0.1</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">R1</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">grand</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">1</span><span style="color:black">,n,</span><span
style="color:rosybrown">'unf'</span><span
style="color:black">,</span><span style="color:rosybrown">0</span><span
style="color:black">,</span><span style="color:rosybrown">500</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">i2</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">grand</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">1</span><span style="color:black">,n,</span><span
style="color:rosybrown">'unf'</span><span
style="color:black">,</span><span style="color:rosybrown">0</span><span
style="color:black">,</span><span style="color:rosybrown">0.1</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">R2</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">grand</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">1</span><span style="color:black">,n,</span><span
style="color:rosybrown">'unf'</span><span
style="color:black">,</span><span style="color:rosybrown">0</span><span
style="color:black">,</span><span style="color:rosybrown">1000</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">//
using parallel_run</span></i><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">Result</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">zeros</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">2</span><span style="color:black">,n</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span>
<i><span style="color:#64AE64">// au final, on a une matrice
de dim (2xn)</span></i><o:p></o:p></span></p>
<p class="MsoNormal"><u><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#AE5CB0;mso-fareast-language:FR">tic</span></u><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">()</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">Result</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span
style="color:#32B9B9">parallel_run</span><span
style="color:#4A55DB">([</span><span style="color:black">R1,i1,R2,i2</span><span
style="color:#4A55DB">]</span><span style="color:black">,</span>
<u><span style="color:black">fct</span></u><span
style="color:black">,</span><span style="color:#4A55DB">[</span><span
style="color:rosybrown">2</span><span style="color:black">,</span><span
style="color:rosybrown">1</span><span
style="color:#4A55DB">])</span><span style="color:black">;</span>
<i><span style="color:#64AE64">// pour les n calculs, on
sont un vecteur de dim (2x1) = meme dimension que U en
sortie</span></i><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR"
lang="EN-US">disp</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">(</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">Result</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR"
lang="EN-US">)</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">;</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:12.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR"
lang="EN-US">time</span><span
style="font-size:12.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"
lang="EN-US">
<span style="color:#5C5C5C">=</span> <u><span
style="color:#AE5CB0">toc</span></u><span
style="color:#4A55DB">()</span><span style="color:black">;</span>
<span style="color:#32B9B9">printf</span><span
style="color:#4A55DB">(</span><span
style="color:rosybrown">"time = %g\n"</span><span
style="color:black">,time</span><span
style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><o:p></o:p></p>
<p><b><i><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:gray">EXPORT
CONTROL :
<br>
</span></i></b><b><span
style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Cet
email ne contient pas de données techniques<br>
This email does not contain technical data</span></b><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:users@lists.scilab.org">users@lists.scilab.org</a>
<a class="moz-txt-link-freetext" href="http://lists.scilab.org/mailman/listinfo/users">http://lists.scilab.org/mailman/listinfo/users</a>
</pre>
</blockquote>
<br>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Département de Génie Informatique
EA 4297 Transformations Intégrées de la Matière Renouvelable
Université de Technologie de Compiègne - CS 60319
60203 Compiègne cedex</pre>
</body>
</html>