{"id":83511,"date":"2020-06-01T07:42:29","date_gmt":"2020-06-01T05:42:29","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/proizvoditelnost-raspberry-pi-dobavlyaem-zram-i-izmenyaem-parametry-yadra"},"modified":"2020-06-01T07:42:29","modified_gmt":"2020-06-01T05:42:29","slug":"proizvoditelnost-raspberry-pi-dobavlyaem-zram-i-izmenyaem-parametry-yadra","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/proizvoditelnost-raspberry-pi-dobavlyaem-zram-i-izmenyaem-parametry-yadra","title":{"rendered":"Raspberry Pi j\u00f5udlus: lisame ZRAM-i ja muudame tuuma seadistusi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Paari n\u00e4dala eest avaldasin <noindex><a rel=\"nofollow\" href=\"https:\/\/haydenjames.io\/pinebook-pro-my-first-impressions-and-setup-tips\/\">Pinebook Pro \u00fclevaate<\/a><\/noindex>. Kuna Raspberry Pi 4 p\u00f5hineb samuti ARM-il, sobivad m\u00f5ned eelnevas artiklis mainitud optimeeringud ka selle jaoks. Tahaksin jagada neid nippe ja teada, kas ka teil ilmnevad sarnased j\u00f5udluse parendused.<\/p>\n<p>P\u00e4rast Raspberry Pi seadistamist oma <noindex><a rel=\"nofollow\" href=\"https:\/\/haydenjames.io\/home-lab-beginners-guide-hardware\/\">kodusesse serverisse<\/a><\/noindex> t\u00e4iesti m\u00e4rkasin, et m\u00e4lu puuduse korral muutus see v\u00e4ga ebamugavaks ja isegi hangus. Selle probleemi lahendamiseks lisasin ZRAM-i ja tegin m\u00f5ned muudatused kernel'i seadetes.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h1>ZRAM-i aktiveerimine Raspberry Pi-s<\/h1>\n<p>\n<img decoding=\"async\" alt=\"Raspberry Pi j\u00f5udlus: lisame ZRAM-i ja muudame tuuma seadistusi\" src=\"\/wp-content\/uploads\/2020\/06\/d5e0d7c2e50dd17a97f008c7ee6dfe30.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.kernel.org\/doc\/Documentation\/blockdev\/zram.txt\">ZRAM<\/a><\/noindex> loob m\u00e4lu sees plokkhoidla nimega \/dev\/zram0 (v\u00f5i 1, 2, 3 jne). Sellesse salvestatud lehed kompressitakse ja hoitakse m\u00e4lus. See v\u00f5imaldab v\u00e4ga kiiret sisend-v\u00e4ljundit ning vabastab m\u00e4lu kompressiooniga.<\/p>\n<p>Raspberry Pi 4 on saadaval 1, 2, 4 v\u00f5i 8 GB m\u00e4luga. Kasutan 1 GB mudelit, seega kohandage juhiseid vastavalt oma mudelile. 1 GB puhul kasutatakse ZRAM-i t\u00f5ttu vaikimisi vahetusfaili (aeglane!) harvemini. Kasutasin sellist skripti <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/foundObjects\/zram-swap\">zram-swap<\/a><\/noindex> paigaldamiseks ja automaatseks seadistamiseks.<\/p>\n<p>Juhised on esitatud \u00fclaltoodud hoidlas. Installatsioon:<\/p>\n<pre><code class=\"bash\">git clone https:\/\/github.com\/foundObjects\/zram-swap.git\ncd zram-swap &amp;&amp; sudo .\/install.sh<\/code><\/pre>\n<p>\nKui soovite konfiguratsiooni redigeerida:<\/p>\n<pre><code class=\"bash\">vi \/etc\/default\/zram-swap<\/code><\/pre>\n<p>\nLisaks on ZRAMi aktiveerimiseks v\u00f5imalik installida <code>zram-tools<\/code>. <b>Kui kasutate seda meetodit, tuleb kindlasti konfiguratsioon redigeerida<\/b> failis <code>\/etc\/default\/zramswap<\/code>, ja seadistage ligikaudu 1 GB ZRAM:<\/p>\n<pre><code class=\"bash\">sudo apt install zram-tools<\/code><\/pre>\n<p>\nP\u00e4rast installimist saate ZRAMi salvestusstatistikat vaadata j\u00e4rgmise k\u00e4suga:<\/p>\n<pre><code class=\"bash\">sudo cat \/proc\/swaps\nFailinimi\t\t\t\tT\u00fc\u00fcp\t\tSuurus\tKasutatud\tPrioriteet\n\/var\/swap                               fail\t\t102396\t0\t-2\n\/dev\/zram0                              partitsioon\t1185368\t265472\t5\npi@raspberrypi:~ $<\/code><\/pre>\n<p><\/p>\n<h1>Lisame tuumaparameetreid ZRAMi t\u00f5husamaks kasutamiseks<\/h1>\n<p>\nN\u00fc\u00fcd parandame s\u00fcsteemi k\u00e4itumist, kui Raspberry Pi suundub viimase hetke vahetusse, mis tihti viib hangumiseni. Lisame m\u00f5ned read faili <b>\/etc\/sysctl.conf<\/b> ja taask\u00e4ivitame.<\/p>\n<p>Need read 1) <b>l\u00f6\u00f6vad l\u00fchiajalise m\u00e4lukaotuse edasi<\/b>, suurendades tuuma vahem\u00e4lu survet ja 2) <b>hakkavad m\u00e4lumuudatust ette valmistama<\/b>, k\u00e4ivitades vahetuse eelnevalt. Kuid see on palju t\u00f5husam vahetus pigistatava m\u00e4luga, kasutades ZRAMi!<\/p>\n<p>Siin on read, mis tuleb faili l\u00f5ppu lisada <b>\/etc\/sysctl.conf<\/b>:<\/p>\n<pre><code class=\"plaintext\">vm.vfs_cache_pressure=500\nvm.swappiness=100\nvm.dirty_background_ratio=1\nvm.dirty_ratio=50<\/code><\/pre>\n<p>\nSeej\u00e4rel taask\u00e4ivitage s\u00fcsteem v\u00f5i aktiveerige muudatused j\u00e4rgmise k\u00e4sklusega:<\/p>\n<pre><code class=\"bash\">sudo sysctl --system<\/code><\/pre>\n<p>\n<b>vm.vfs_cache_pressure=500<\/b> suurendab vahemen\u00fc\u00fc survet, mis suurendab tuuma kalduvust eraldama m\u00e4lu, mida kasutatakse kataloogide ja indeksite objekti vahem\u00e4llu hoidmiseks. Te kasutate v\u00e4hem m\u00e4lu pikema aja jooksul. Otsene j\u00f5udluse langus neutraliseeritakse varasema vahetuse t\u00f5ttu.<\/p>\n<p><b>vm.swappiness=100<\/b> suurendab parameetrit, kui agressiivselt tuum m\u00e4lulehti vahetab, kuna me kasutame esmalt ZRAM-i.<\/p>\n<p><b>vm.dirty_background_ratio=1 &amp; vm.dirty_ratio=50<\/b> \u2014 taustprotsessid hakkavad kirjutama kohe, kui saavutatakse 1% piir, kuid s\u00fcsteem ei sunni kohustuslikku s\u00fcnkroonset sisend-v\u00e4ljundit enne, kui ta j\u00f5uab 50% dirty_ratio-ni.<\/p>\n<p>Need neli rida (kasutades ZRAM-i) aitavad parandada j\u00f5udlust juhul, kui teil on <u>m\u00f6\u00f6dumatult<\/u> l\u00f5ppemas t\u00f6\u00f6m\u00e4lu ja hakkab vahetusprotsess k\u00e4ima, nagu mul on. Teades seda fakti ning arvestades ZRAM-i m\u00e4 compressimise kolme korda parem tekitab see soovitava vahetuse enne.<\/p>\n<p>Vahe\u00f5hkude r\u00f5hk aitab, sest me r\u00e4\u00e4gime tegelikult tuumale: \"Hei, kuula, mul ei ole \u00fcleliigset m\u00e4lu, et seda vahe\u00f5hkude jaoks kasutada, seega palun vabane sellest v\u00f5imalikult kiiresti ja hoia ainult k\u00f5ige sagedamini kasutatavaid\/olulisi andmeid.\"<\/p>\n<p>Isegi k\u00fctmise v\u00e4hendamise korral, kui aja jooksul enamik paigaldatud m\u00e4lust on h\u00f5ivatud, hakkab tuum opportunistlikku vahetust palju varem, nii et protsessor (kompressioon) ja sisend\/v\u00e4lja t\u00f5ukamine ei venita viimase minutini ja ei kasuta k\u00f5iki ressursse korraga, kui on juba liiga hilja. ZRAM kasutab kompressiooniks veidi CPU-d, kuid enamikes madala m\u00e4lu mahtudega s\u00fcsteemides m\u00f5jutab see j\u00f5udlust oluliselt v\u00e4hem kui vahetus ilma ZRAM-ita.<\/p>\n<h1>Kokkuv\u00f5tteks<\/h1>\n<p>\nVaadakem tulemusi veel kord:<\/p>\n<pre><code class=\"plaintext\">pi@raspberrypi:~ $ free -h\ntotal used free shared buff\/cache available\nMem: 926Mi 471Mi 68Mi 168Mi 385Mi 232Mi\nSwap: 1.2Gi 258Mi 999Mi\n\npi@raspberrypi:~ $ sudo cat \/proc\/swaps \nFilename Type Size Used Priority\n\/var\/swap file 102396 0 -2\n\/dev\/zram0 partition 1185368 264448 5<\/code><\/pre>\n<p>\n264448 ZRAM-is \u2014 see peaaegu \u00fcks gigabait tihendamata andmeid. K\u00f5ik l\u00e4ks ZRAM-i ja mitte midagi ei sattunud palju aeglasemasse vahetusfaili. Proovige ise selliseid seadistusi, need t\u00f6\u00f6tavad k\u00f5ikidel Raspberry Pi mudelitel. Minu kasutusk\u00f5lbmatu s\u00fcsteem muutus t\u00f6\u00f6tavaks ja stabiilseks.<\/p>\n<p>L\u00e4hitulevikus loodan j\u00e4tkata ja uuendada seda artiklit, tuues m\u00f5ned s\u00fcsteemi testimise tulemused enne ja p\u00e4rast ZRAM-i installimist. Hetkel mul lihtsalt ei ole aega. Siiski \u00e4rge kartke teha oma teste ja andke kommentaarides teada. Raspberry Pi 4 on t\u00f5eliselt tugev koos selliste seadistustega. Nautige!<\/p>\n<blockquote><p><b>Teema:<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/haydenjames.io\/linux-performance-almost-always-add-swap-space\/\">Linuxi j\u00f5udlus: miks peate peaaegu alati suurendama vahetusala<\/a><\/noindex> (2017)\n<\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/haydenjames.io\/linux-performance-almost-always-add-swap-part2-zram\/\">Linuxi j\u00f5udlus: suurendage peaaegu alati vahetusala. Osa 2: ZRAM<\/a><\/noindex> (2020)<\/li>\n<\/ul>\n<\/blockquote>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/504468\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u0430\u0440\u0443 \u043d\u0435\u0434\u0435\u043b\u044c \u043d\u0430\u0437\u0430\u0434 \u044f \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043e\u0431\u0437\u043e\u0440 Pinebook Pro. \u041f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 Raspberry Pi 4 \u0442\u043e\u0436\u0435 \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 ARM, \u0442\u043e \u0434\u043b\u044f \u043d\u0435\u0451 \u0432\u043f\u043e\u043b\u043d\u0435 \u043f\u043e\u0434\u0445\u043e\u0434\u044f\u0442 \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0438\u0437 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u0439, \u0443\u043f\u043e\u043c\u044f\u043d\u0443\u0442\u044b\u0445 \u0432 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u0441\u0442\u0430\u0442\u044c\u0435. \u0425\u043e\u0442\u0435\u043b \u0431\u044b \u043f\u043e\u0434\u0435\u043b\u0438\u0442\u044c\u0441\u044f \u044d\u0442\u0438\u043c\u0438 \u0445\u0438\u0442\u0440\u043e\u0441\u0442\u044f\u043c\u0438 \u0438 \u0443\u0437\u043d\u0430\u0442\u044c, \u043f\u0440\u043e\u044f\u0432\u044f\u0442\u0441\u044f \u043b\u0438 \u0443 \u0432\u0430\u0441 \u0442\u0430\u043a\u0438\u0435 \u0436\u0435 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f \u0432 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438. \u041f\u043e\u0441\u043b\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 Raspberry Pi \u0432 \u0441\u0432\u043e\u044e \u0434\u043e\u043c\u0430\u0448\u043d\u044e\u044e \u0441\u0435\u0440\u0432\u0435\u0440\u043d\u0443\u044e \u044f \u0437\u0430\u043c\u0435\u0442\u0438\u043b, \u0447\u0442\u043e [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":83512,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-83511","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0430\u0440\u0443 \u043d\u0435\u0434\u0435\u043b\u044c \u043d\u0430\u0437\u0430\u0434 \u044f \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043e\u0431\u0437\u043e\u0440 Pinebook Pro. \u041f\u043e\u0441\u043a\u043e\u043b\u044c\u043a\u0443 Raspberry Pi 4 \u0442\u043e\u0436\u0435 \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u0430 \u043d\u0430 ARM, \u0442\u043e \u0434\u043b\u044f \u043d\u0435\u0451 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