{"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\/sq\/blog\/administrirovanie\/proizvoditelnost-raspberry-pi-dobavlyaem-zram-i-izmenyaem-parametry-yadra","title":{"rendered":"P\u00ebrformanca e Raspberry Pi: shtoni ZRAM dhe ndryshoni parametrat e b\u00ebrtham\u00ebs","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Para disa jav\u00ebsh publikova rishikimin e Pinebook Pro<\/a><\/noindex>. Duke qen\u00eb se Raspberry Pi 4 gjithashtu \u00ebsht\u00eb e bazuar n\u00eb ARM, disa nga optimizimet e p\u00ebrmendura n\u00eb artikullin e m\u00ebparsh\u00ebm jan\u00eb t\u00eb p\u00ebrshtatshme p\u00ebr t\u00eb. Do doja t\u00eb ndaja k\u00ebto truke dhe t\u00eb shihja n\u00ebse do t\u00eb keni p\u00ebrmir\u00ebsime t\u00eb ngjashme n\u00eb performanc\u00eb.<\/p>\n

Pas instalimit t\u00eb Raspberry Pi n\u00eb serverin tim n\u00eb sht\u00ebpi<\/a><\/noindex> v\u00ebrejta se n\u00eb momentet e munges\u00ebs s\u00eb memories s\u00eb operativ\u00ebs, ajo b\u00ebhej shum\u00eb e pap\u00ebrgjegjshme dhe madje ngrinte. P\u00ebr t\u00eb zgjidhur k\u00ebt\u00eb problem, shtova ZRAM dhe b\u00ebra disa ndryshime n\u00eb parametrat e b\u00ebrtham\u00ebs.
\n<\/a><\/noindex><\/p>\n

Aktivizimi i ZRAM n\u00eb Raspberry Pi<\/h1>\n

\n\"P\u00ebrformanca
\n
\nZRAM<\/a><\/noindex> krijon nj\u00eb hap\u00ebsir\u00eb ruajtjeje n\u00eb memorie me emrin \/dev\/zram0 (ose 1, 2, 3, etj.). Flet\u00ebt e shkruara aty shtypen dhe ruhten n\u00eb memorie. Kjo mund\u00ebson nj\u00eb hyrje-dalje shum\u00eb t\u00eb shpejt\u00eb dhe gjithashtu lirohet memorie p\u00ebrmes kompresionit.<\/p>\n

Raspberry Pi 4 vjen me 1, 2, 4 ose 8 GB memorie RAM. Un\u00eb do t\u00eb p\u00ebrdor modelin me 1 GB, prandaj rregulloni udh\u00ebzimin sipas modelit tuaj. Me 1 GB ZRAM, skedari i k\u00ebmbimit i paracaktuar (i ngadalsh\u00ebm!) do t\u00eb p\u00ebrdoret m\u00eb rrall\u00eb. Kam p\u00ebrdorur nj\u00eb skenar t\u00eb till\u00eb zram-swap<\/a><\/noindex> p\u00ebr instalimin dhe konfigurimin automatik.<\/p>\n

Udh\u00ebzimet jan\u00eb t\u00eb disponueshme n\u00eb depot p\u00ebrmes lidhjes m\u00eb sip\u00ebr. Instalimi:<\/p>\n

git clone https:\/\/github.com\/foundObjects\/zram-swap.git\ncd zram-swap && sudo .\/install.sh<\/code><\/pre>\n
\nN\u00ebse d\u00ebshironi t\u00eb redaktoni konfigurimin:<\/p>\n
vi \/etc\/default\/zram-swap<\/code><\/pre>\n
\nP\u00ebr m\u00eb tep\u00ebr, mund t\u00eb aktivizoni ZRAM duke instaluar zram-tools<\/code>. N\u00ebse p\u00ebrdorni k\u00ebt\u00eb metod\u00eb, sigurohuni q\u00eb t\u00eb redaktoni konfigurimin<\/b> n\u00eb skedarin \/etc\/default\/zramswap<\/code>, dhe vendosni rreth 1 GB ZRAM:<\/p>\n
sudo apt install zram-tools<\/code><\/pre>\n
\nPas instalimit, mund t\u00eb shihni statistikat e magazinimit ZRAM me komand\u00ebn e m\u00ebposhtme:<\/p>\n
sudo cat \/proc\/swaps\nFilename\t\t\t\tType\t\tSize\tUsed\tPriority\n\/var\/swap                               file\t\t102396\t0\t-2\n\/dev\/zram0                              partition\t1185368\t265472\t5\npi@raspberrypi:~ $<\/code><\/pre>\n
<\/p>\n
Shtojm\u00eb parametrat e b\u00ebrtham\u00ebs p\u00ebr p\u00ebrdorim m\u00eb t\u00eb mir\u00eb t\u00eb ZRAM<\/h1>\n
\nTani do t\u00eb rregullojm\u00eb sjelljen e sistemit kur Raspberry Pi kalon n\u00eb k\u00ebmbim n\u00eb momentin e fundit, \u00e7ka shpesh \u00e7on n\u00eb ngrirje. Do t\u00eb shtojm\u00eb disa rreshta n\u00eb dosjen \/etc\/sysctl.conf<\/b> dhe do t\u00eb ri\u00e7elim.<\/p>\n
K\u00ebto rreshta 1) zgjat ngjarjen e d\u00ebshtimit t\u00eb memories<\/b>, duke rritur presionin mbi cache-in e b\u00ebrtham\u00ebs dhe 2) fillojn\u00eb p\u00ebrgatitjet p\u00ebr d\u00ebshtimin e memories m\u00eb her\u00ebt<\/b>, duke iniciuar paraprakisht swap-in. Por kjo do t\u00eb jet\u00eb nj\u00eb swap m\u00eb efektiv i memories s\u00eb kompresuar p\u00ebrmes ZRAM!<\/p>\n
K\u00ebto jan\u00eb rreshtat q\u00eb duhet t\u00eb shtohen n\u00eb fund t\u00eb skedarit \/etc\/sysctl.conf<\/b>:<\/p>\n
vm.vfs_cache_pressure=500\nvm.swappiness=100\nvm.dirty_background_ratio=1\nvm.dirty_ratio=50<\/code><\/pre>\n
\nM\u00eb pas, riaktivojm\u00eb sistemin ose aktivizojm\u00eb ndryshimet me komand\u00ebn n\u00eb vijim:<\/p>\n
sudo sysctl --system<\/code><\/pre>\n
\nvm.vfs_cache_pressure=500<\/b> rrit presionin mbi cache-in, \u00e7ka rrit prirjen e b\u00ebrtham\u00ebs p\u00ebr t\u00eb rikuperuar memorien e p\u00ebrdorur p\u00ebr caching t\u00eb objekteve t\u00eb katalogut dhe indekseve. Do t\u00eb p\u00ebrdorni m\u00eb pak memorie p\u00ebr nj\u00eb periudh\u00eb m\u00eb t\u00eb gjat\u00eb. R\u00ebnia e papritur e performanc\u00ebs p\u00ebrkryer nga nj\u00eb swap m\u00eb i vonsh\u00ebm.<\/p>\n
vm.swappiness=100<\/b> rrit parametrin n\u00eb sa agresivisht b\u00ebrthama do t\u00eb swap-in faqet e memories, pasi fillimisht p\u00ebrdorim ZRAM.<\/p>\n
vm.dirty_background_ratio=1 & vm.dirty_ratio=50<\/b> \u2014 proceset n\u00eb sfond do t\u00eb fillojn\u00eb shkrimin menj\u00ebher\u00eb sapo t\u00eb arrijn\u00eb limitin prej 1%, por sistemi nuk do ta detyroj\u00eb p\u00ebrparimin e hyrjes-daljes sinkron derisa t\u00eb arrij\u00eb dirty_ratio n\u00eb 50%.<\/p>\n
K\u00ebto kat\u00ebr rreshta (kur p\u00ebrdoren me ZRAM) do t\u00eb ndihmojn\u00eb n\u00eb p\u00ebrmir\u00ebsimin e performanc\u00ebs n\u00ebse ju \u00ebsht\u00eb e pashmangshme<\/u> po mbaron memoria e operacionit dhe fillon kalimi n\u00eb swapping, si\u00e7 ndodhi me mua. Duke e ditur k\u00ebt\u00eb fakt, si dhe duke marr\u00eb parasysh comprimimin e memories n\u00eb ZRAM q\u00eb \u00ebsht\u00eb tre her\u00eb m\u00eb i mir\u00eb, m\u00eb mir\u00eb t\u00eb filloni k\u00ebt\u00eb swapping m\u00eb her\u00ebt.<\/p>\n
Presioni n\u00eb cache ndihmon, sepse p\u00ebr t\u00eb v\u00ebrtet\u00eb po i themi kernelit: \"Hej, d\u00ebgjo, nuk kam m\u00eb shum\u00eb memorie p\u00ebr ta p\u00ebrdorur p\u00ebr cache, prandaj, t\u00eb lutem, hiq at\u00eb sa m\u00eb shpejt dhe ruaj vet\u00ebm t\u00eb dh\u00ebnat m\u00eb t\u00eb p\u00ebrdorura\/m\u00eb t\u00eb r\u00ebnd\u00ebsishme\".<\/p>\n
Madje edhe kur zvog\u00eblohet caching, n\u00ebse me kalimin e koh\u00ebs shumica e memories s\u00eb instaluar \u00ebsht\u00eb e mbushur, kernel do t\u00eb filloj\u00eb swapping oportunistik shum\u00eb m\u00eb her\u00ebt, k\u00ebshtu q\u00eb procesori (compressimi) dhe input\/output i swap-it nuk do t\u00eb priten deri n\u00eb fund dhe t\u00eb angazhojn\u00eb t\u00eb gjitha burimet menj\u00ebher\u00eb, kur \u00ebsht\u00eb tashm\u00eb shum\u00eb von\u00eb. ZRAM p\u00ebrdor pak CPU p\u00ebr comprimim, por n\u00eb shumic\u00ebn e sistemeve me memorje t\u00eb vog\u00ebl, kjo ndikon shum\u00eb m\u00eb pak n\u00eb performanc\u00eb sesa swapping pa ZRAM.<\/p>\n
N\u00eb p\u00ebrfundim<\/h1>\n
\nLe t\u00eb shikojm\u00eb p\u00ebrs\u00ebri rezultatin:<\/p>\n
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
\n264448 n\u00eb ZRAM \u00ebsht\u00eb pothuajse nj\u00eb gigabayt i t\u00eb dh\u00ebnave t\u00eb pap\u00ebshtjelluara. T\u00eb gjitha shkuan n\u00eb ZRAM dhe asgj\u00eb nuk shkoi n\u00eb skedarin e z\u00ebrit q\u00eb \u00ebsht\u00eb shum\u00eb m\u00eb i ngadalt\u00eb. Provoni k\u00ebt\u00eb konfigurim vet\u00eb, funksionon n\u00eb t\u00eb gjitha modelet e Raspberry Pi. Nj\u00eb sistem i pap\u00ebrshtatsh\u00ebm u shnd\u00ebrrua n\u00eb nj\u00eb sistem funksional dhe stabil.<\/p>\n
N\u00eb t\u00eb ardhmen e af\u00ebrt, shpresoj t\u00eb vazhdoj dhe t\u00eb p\u00ebrdit\u00ebsoj k\u00ebt\u00eb artikull me disa rezultate t\u00eb testeve t\u00eb sistemit para dhe pas instalimit t\u00eb ZRAM. Tani nuk kam koh\u00eb p\u00ebr k\u00ebt\u00eb. Nd\u00ebrkoh\u00eb, mos hezitoni t\u00eb kryeni testet tuaja dhe na tregoni n\u00eb komentet. Raspberry Pi 4 \u00ebsht\u00eb thjesht nj\u00eb bish\u00eb me k\u00ebto konfigurime. Shijoni!<\/p>\n
P\u00ebr tem\u00ebn:<\/b><\/p>\n