{"id":161,"date":"2013-03-11T12:32:45","date_gmt":"2013-03-11T11:32:45","guid":{"rendered":"http:\/\/sam-soul.fr\/Info\/?p=161"},"modified":"2013-03-11T12:32:45","modified_gmt":"2013-03-11T11:32:45","slug":"top-liste-des-processus","status":"publish","type":"post","link":"http:\/\/les-fougs.com\/wordpress\/2013\/03\/11\/top-liste-des-processus\/","title":{"rendered":"Top &#8211; Liste des processus"},"content":{"rendered":"<p>La commande top affiche quelques informations utiles ainsi qu&rsquo;une liste des processus tri\u00e9 par ordre de consommation cpu.<br \/>\nSi top permet de garder un oeil sur les processus les plus gourmants et permet l&rsquo;identification des processus qui freine le bon fonctionnement du syst\u00e8me, le rafraichissement constant de top (toutes les 3 \u00e0 5 sec) le rend aussi peu utilise lorsque l&rsquo;on d\u00e9sire espionner un processus particulier.<br \/>\nEn effet, la position d&rsquo;un processus dans la liste varie constamment avec fonction de sa consommation cpu. C&rsquo;est assez agacant.<br \/>\nVoici le r\u00e9sultat d&rsquo;une commande top.<br \/>\n<span style=\"text-decoration: underline;\">Attention:<\/span> Il est cependant possible d&rsquo;indiquer pr\u00e9cis\u00e9ment le ou les processes \u00e0 suivre (top -p pid1,pid2,&#8230;)<\/p>\n<pre>top - 11:37:01 up 3 days, 21:11, 2 users, load average: 0.34, 0.24, 0.23 Tasks: 182 total, 3 running, 179 sleeping, 0 stopped, 0 zombie Cpu(s): 12.6%us, 1.1%sy, 0.0%ni, 86.2%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st Mem: 2569208k total, 1451288k used, 1117920k free, 157804k buffers Swap: 12286972k total, 0k used, 12286972k free, 729628k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9980 domeu 20 0 400m 115m 28m S 27 4.6 9:05.54 firefox-bin 1309 root 20 0 94356 74m 18m R 24 3.0 37:01.50 Xorg 1706 domeu 20 0 69148 46m 14m S 3 1.9 7:47.29 compiz 9997 domeu 20 0 134m 31m 14m S 3 1.2 1:42.08 plugin-containe 10079 domeu 20 0 93140 13m 10m S 3 0.6 0:00.84 gnome-terminal 1160 root 20 0 19292 4356 3572 S 0 0.2 0:06.87 NetworkManager 9498 root 20 0 0 0 0 R 0 0.0 0:00.92 kondemand\/2 10322 domeu 20 0 2620 1156 840 R 0 0.0 0:00.02 top 1 root 20 0 2864 1700 1224 S 0 0.1 0:00.86 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:04.54 ksoftirqd\/0 4 root RT 0 0 0 0 S 0 0.0 0:00.65 migration\/0 5 root RT 0 0 0 0 S 0 0.0 0:00.00 watchdog\/0 15 root 20 0 0 0 0 S 0 0.0 0:05.05 events\/0 19 root 20 0 0 0 0 S 0 0.0 0:00.00 cpuset<\/pre>\n<p>L&rsquo;ent\u00eate mentionne:<\/p>\n<ul>\n<li>La date et l&rsquo;heure mais aussi &laquo;&nbsp;uptime&nbsp;&raquo; (cfr: up)<\/li>\n<li>La charge moyenne (average load)<\/li>\n<li>L&rsquo;usage de la m\u00e9moire (y compris swap)<\/li>\n<li>L&rsquo;usage CPU d\u00e9taill\u00e9\n<ul>\n<li>us : User<\/li>\n<li>sy : system<\/li>\n<li>ni : nice<\/li>\n<li>id : idle<\/li>\n<li>wa : iowait<\/li>\n<li>hi : H\/w interrupt requests<\/li>\n<li>si : S\/w interrupt requests<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>La liste elle-m\u00eame reprend:<\/p>\n<pre>PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 9980 domeu 20 0 400m 115m 28m S 27 4.6 9:05.54 firefox-bin<\/pre>\n<p><span style=\"font-size: x-small;\"><strong>pid<\/strong> &#8211; identification du processus<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>pr<\/strong> &#8211; la priorit\u00e9 attribu\u00e9e par l&rsquo;OS. Cette valeur d\u00e9pend de la valeur de &laquo;&nbsp;nice&nbsp;&raquo; et d&rsquo;autres param\u00e8tres. plus le chiffre est grand et moins le processus est prioritaire.<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>ni<\/strong> &#8211; la priorit\u00e9 donn\u00e9e par l&rsquo;utilisateur (-20 la plus haute, 20 la plus basse).<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>virt<\/strong> &#8211; la m\u00e9moire vituelle utilis\u00e9e par le processus (mem processus + data processus + biblioth\u00e8ques partag\u00e9es utilis\u00e9es + swap)<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>res<\/strong> &#8211; la quantit\u00e9 de ressource utilis\u00e9 par le processus (mem processus + data processus)<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>shr<\/strong> &#8211; la m\u00e9moire partag\u00e9e utilis\u00e9e par le processus.<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>%cpu<\/strong> &#8211; \u00e9vident<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>%mem<\/strong> &#8211; pourcentage de la m\u00e9moire physique utilis\u00e9e par le processus.<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>time<\/strong> &#8211; temps cumul\u00e9 durant lequel le processus a \u00e9t\u00e9 actif.<\/span><br \/>\n<span style=\"font-size: x-small;\"><strong>command<\/strong> &#8211; la commande qui \u00e0 lanc\u00e9 le processus<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La commande top affiche quelques informations utiles ainsi qu&rsquo;une liste des processus tri\u00e9 par ordre de consommation cpu. Si top permet de garder un oeil sur les processus les plus gourmants et permet l&rsquo;identification des processus qui freine le bon fonctionnement du syst\u00e8me, le rafraichissement constant de top (toutes les 3 \u00e0 5 sec) le &hellip; <a href=\"http:\/\/les-fougs.com\/wordpress\/2013\/03\/11\/top-liste-des-processus\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;Top &#8211; Liste des processus&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[51],"tags":[],"_links":{"self":[{"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/posts\/161"}],"collection":[{"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/comments?post=161"}],"version-history":[{"count":0,"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/posts\/161\/revisions"}],"wp:attachment":[{"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/media?parent=161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/categories?post=161"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/les-fougs.com\/wordpress\/wp-json\/wp\/v2\/tags?post=161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}