{"id":494,"date":"2023-04-14T18:01:52","date_gmt":"2023-04-14T17:01:52","guid":{"rendered":"http:\/\/elcep.legtux.org\/?p=494"},"modified":"2023-04-14T18:01:52","modified_gmt":"2023-04-14T17:01:52","slug":"netlogo-on-y-revient-en-headless","status":"publish","type":"post","link":"https:\/\/elcep.legtux.org\/?p=494","title":{"rendered":"Netlogo on y revient en headless"},"content":{"rendered":"\n

Je me suis retrouv\u00e9 dans une situation que vous avez peut-\u00eatre d\u00e9j\u00e0 rencontr\u00e9e (en tout cas moi je l’avais d\u00e9j\u00e0 rencontr\u00e9e), r\u00e9solu et oubli\u00e9! C’est le <\/p>\n\n\n\n

Exception: java.lang.OutOfMemoryError<\/code>\n<\/code><\/pre>\n\n\n\n
Il y a bien s\u00fbr plein de ressources l\u00e0-dessus, mais voil\u00e0 une forme de pense-b\u00eate ! L’id\u00e9e ici est que netlogo (ou plut\u00f4t java) a d\u00e9fini au lancement la place qu’il peut prendre dans la RAM. Or quand on a des mod\u00e8les qui deviennent un peu gros, on se retrouve vite \u00e0 l’\u00e9troit ! <\/p>\n\n\n\n
La solution semble de passer en mode headless (donc lancer netolgo sans l’interface), en ayant au pr\u00e9alable bidouill\u00e9 le script de lancement. <\/p>\n\n\n\n
Pour netlogo 6.2.X \u00e7a se passe dans netlogo-headless.sh<\/code> dans l’argument Xmx<\/p>\n\n\n\n
 # -Xmx1024m             use up to 1GB RAM (edit to increase)\n# -XX:+UseParallelGC    The parallel collector maximizes throughput\n# -Dfile.encoding=UTF-8 ensure Unicode characters in model files are compatible$\nJVM_OPTS=(-Xmx20024m -XX:+UseParallelGC -Dfile.encoding=UTF-8)<\/code><\/pre>\n\n\n\n
Ensuite pour lancer une exp\u00e9rience dans la GUI il suffit de lancer quelque chose comme <\/p>\n\n\n\n
.\/netlogo-headless.sh \\
--model \"..\/repro-seir-master\/model\/m2-seir.nlogo\" \\
--experiment \"experiment\" \\
--table \"..\/repro-seir-master\/model\/data\/m2-seir experiment-table_140420231645.csv\" \\
--threads 30<\/code><\/p>\n\n\n\n
Et Pan \u00e7a lancer sur 30 c\u0153urs notre netlogo et sans faire exploser la m\u00e9moire. <\/p>\n\n\n\n
\"\"<\/p>\n\n\n\n
Et voil\u00e0 que mon \u00ab\u00a0petit\u00a0\u00bb mod\u00e8le SEIR<\/a> d’\u00e9pidemo avec 20 000 agents en interaction se sent un peu plus \u00e0 son aise ! <\/p>\n\n\n\n
\"\"<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"
Je me suis retrouv\u00e9 dans une situation que vous avez peut-\u00eatre d\u00e9j\u00e0 rencontr\u00e9e (en tout cas moi je l’avais d\u00e9j\u00e0 rencontr\u00e9e), r\u00e9solu et oubli\u00e9! C’est le Il y a bien s\u00fbr plein de ressources l\u00e0-dessus, mais voil\u00e0 une forme de pense-b\u00eate ! L’id\u00e9e ici est que netlogo (ou plut\u00f4t java) a d\u00e9fini au lancement la … Continuer la lecture de Netlogo on y revient en headless<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":229,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[12,9],"class_list":["post-494","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sma","tag-linux","tag-netlogo"],"_links":{"self":[{"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/posts\/494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=494"}],"version-history":[{"count":4,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/posts\/494\/revisions"}],"predecessor-version":[{"id":499,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/posts\/494\/revisions\/499"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=\/wp\/v2\/media\/229"}],"wp:attachment":[{"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/elcep.legtux.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}