{"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: shtojm\u00eb ZRAM dhe ndryshojm\u00eb parametrat e b\u00ebrtham\u00ebs","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

P\u00ebr nj\u00eb t\u00eb kaluar dy jav\u00ebsh publikova nj\u00eb p\u00ebrmbledhje p\u00ebr Pinebook Pro<\/a><\/noindex>. Duke marr\u00eb parasysh se Raspberry Pi 4 gjithashtu bazohet n\u00eb ARM, disa nga optimizimet e p\u00ebrmendura n\u00eb artikullin e kaluar jan\u00eb krejt\u00ebsisht t\u00eb p\u00ebrshtatshme p\u00ebr t\u00eb. D\u00ebshiroj t\u00eb ndaj k\u00ebto truke dhe t\u00eb shoh n\u00ebse ju do t\u00eb shihni p\u00ebrmir\u00ebsime t\u00eb ngjashme n\u00eb performanc\u00eb.<\/p>\n

Pas instalimit t\u00eb Raspberry Pi n\u00eb serverin tim sht\u00ebpiak<\/a><\/noindex> , vura re se n\u00eb momentet e munges\u00ebs s\u00eb memorjes operativ\u00eb, ajo b\u00ebhej shum\u00eb e ngadalt\u00eb dhe madje bllokohej. P\u00ebr t\u00eb zgjidhur k\u00ebt\u00eb problem, shtova ZRAM dhe b\u00ebra disa ndryshime n\u00eb parametrat e kernelit.
\n<\/a><\/noindex><\/p>\n

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

\n\"P\u00ebrformanca
\n
\nZRAM<\/a><\/noindex> krijon nj\u00eb ruajtje bllok n\u00eb memorjen operativ\u00eb me emrin \/dev\/zram0 (ose 1, 2, 3 etj.). Flet\u00ebt e shkruara aty ngjeshen dhe ruhen n\u00eb memorje. Kjo siguron nj\u00eb hyrje-dalje shum\u00eb t\u00eb shpejt\u00eb dhe gjithashtu \u00e7liron memorjen p\u00ebrmes ngjeshjes.<\/p>\n

Raspberry Pi 4 vjen me 1, 2, 4 ose 8 GB memorje operative. Do t\u00eb p\u00ebrdor modelin 1 GB, prandaj rregulloni udh\u00ebzimin sipas modelit tuaj. Me 1 GB, skedari i pages\u00ebs ZRAM (i ngadalsh\u00ebm!) do t\u00eb p\u00ebrdoret m\u00eb rrall\u00eb. Un\u00eb p\u00ebrdora skenarin e till\u00eb zram-swap<\/a><\/noindex> p\u00ebr ta instaluar dhe konfiguruar automatikisht.<\/p>\n

Udh\u00ebzimet jan\u00eb n\u00eb depot q\u00eb jan\u00eb n\u00eb lidhjen e m\u00ebsip\u00ebrme. 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\u00ebrve\u00e7 k\u00ebsaj, mund t\u00eb aktivizoni ZRAM duke instaluar zram-tools<\/code>. N\u00ebse p\u00ebrdorni k\u00ebt\u00eb metod\u00eb, sigurohuni 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 statistik\u00ebn e ruajtjes 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 kernelit p\u00ebr nj\u00eb p\u00ebrdorim m\u00eb t\u00eb mir\u00eb t\u00eb ZRAM<\/h1>\n
\nTani do t\u00eb korrigjojm\u00eb sjelljen e sistemit kur Raspberry Pi kalon n\u00eb pagez administrativ n\u00eb momentin e fundit, gj\u00eb q\u00eb shpesh shkakton bllokime. Do t\u00eb shtojm\u00eb disa rreshta n\u00eb skedarin \/etc\/sysctl.conf<\/b> dhe do t\u00eb rinisim.<\/p>\n
K\u00ebto rreshta 1) do t\u00eb ngadal\u00ebsojn\u00eb shterimin e paevituesh\u00ebm t\u00eb memorjes<\/b>, duke rritur presionin n\u00eb ruajtjen e kernelit dhe 2) fillojn\u00eb m\u00eb her\u00ebt p\u00ebrgatitjen p\u00ebr shterimin e memorjes<\/b>, duke iniciuar p\u00ebrpara pages\u00ebn. Por kjo do t\u00eb jet\u00eb nj\u00eb pages\u00eb shum\u00eb m\u00eb efikase e memorjes s\u00eb ngjeshur p\u00ebrmes ZRAM!<\/p>\n
K\u00ebto jan\u00eb rreshtat q\u00eb duhet t\u00eb shtoni 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
\nPastaj rinisni sistemin ose aktivizoni ndryshimet me komand\u00ebn e m\u00ebposhtme:<\/p>\n
sudo sysctl --system<\/code><\/pre>\n
\nvm.vfs_cache_pressure=500<\/b> rrit presionin n\u00eb cache, gj\u00eb q\u00eb rrit prirjen e b\u00ebrtham\u00ebs p\u00ebr t\u00eb riakumuar memorien q\u00eb p\u00ebrdoret p\u00ebr caching t\u00eb objekteve t\u00eb direktoreve 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 neutralizohet nga swapimi m\u00eb i hersh\u00ebm.<\/p>\n
vm.swappiness=100<\/b> rrit parametrin se sa agresivisht b\u00ebrthama do t\u00eb swapoj\u00eb faqe t\u00eb memories, pasi fillimisht do t\u00eb p\u00ebrdorim ZRAM.<\/p>\n
vm.dirty_background_ratio=1 & vm.dirty_ratio=50<\/b> proceset e prapambetura do t\u00eb fillojn\u00eb t\u00eb shkruajn\u00eb menj\u00ebher\u00eb sapo t\u00eb arrijn\u00eb limitin 1%, por sistemi nuk do t\u00eb detyrohet t\u00eb kryej\u00eb I\/O sinqor derisa t\u00eb arrihet dirty_ratio n\u00eb 50%.<\/p>\n
K\u00ebto kat\u00ebr rreshta (n\u00eb p\u00ebrdorim me ZRAM) do t\u00eb ndihmojn\u00eb n\u00eb p\u00ebrmir\u00ebsimin e performanc\u00ebs n\u00ebse keni padyshim<\/u> memorin\u00eb e operativ\u00ebs q\u00eb p\u00ebrfundon dhe kalon n\u00eb swap, ashtu si ndodhi me mua. Duke qen\u00eb n\u00eb dijeni t\u00eb k\u00ebtij fakti, si dhe duke marr\u00eb parasysh kompresimin e memories n\u00eb ZRAM, \u00ebsht\u00eb tri her\u00eb m\u00eb mir\u00eb t\u00eb filloni k\u00ebt\u00eb swapim m\u00eb her\u00ebt.<\/p>\n
Presioni n\u00eb cache ndihmon, sepse ne n\u00eb t\u00eb v\u00ebrtet\u00eb po i themi b\u00ebrtham\u00ebs: \"Hej, d\u00ebgjo, nuk kam memorie shtes\u00eb p\u00ebr ta p\u00ebrdorur p\u00ebr cache, prandaj, t\u00eb lutem, hiqje at\u00eb sa m\u00eb shpejt dhe mbaje vet\u00ebm t\u00eb dh\u00ebnat m\u00eb t\u00eb p\u00ebrdorura\/kryesore.\"<\/p>\n
Edhe me uljen e caching-ut, n\u00ebse me kalimin e koh\u00ebs pjesa m\u00eb e madhe e memories s\u00eb instaluar \u00ebsht\u00eb e z\u00ebn\u00eb, b\u00ebrthama do t\u00eb filloj\u00eb t\u00eb swapoj\u00eb shum\u00eb m\u00eb her\u00ebt, n\u00eb m\u00ebnyr\u00eb q\u00eb procesori (kompresimi) dhe I\/O e swapit mos t\u00eb t\u00ebrheqin deri n\u00eb fund dhe t\u00eb aktivizojn\u00eb t\u00eb gjitha burimet menj\u00ebher\u00eb, kur \u00ebsht\u00eb shum\u00eb von\u00eb. ZRAM p\u00ebrdor pak CPU p\u00ebr kompresim, por n\u00eb shumic\u00ebn e sistemeve me memorie t\u00eb ul\u00ebt kjo ndikon shum\u00eb m\u00eb pak n\u00eb performanc\u00eb se sa swap pa ZRAM.<\/p>\n
N\u00eb p\u00ebrfundim<\/h1>\n
\nLe ta shohim nj\u00eb her\u00eb tjet\u00ebr rezultat:<\/p>\n
pi@raspberrypi:~ $ free -h\ntotali p\u00ebrdorur i lir\u00eb i ndar\u00eb buff\/cache i disponuesh\u00ebm\nMem: 926Mi 471Mi 68Mi 168Mi 385Mi 232Mi\nSwap: 1.2Gi 258Mi 999Mi\n\npi@raspberrypi:~ $ sudo cat \/proc\/swaps \nEmri Tipi Madh\u00ebsia P\u00ebrdorur Prioritet\n\/var\/swap file 102396 0 -2\n\/dev\/zram0 partition 1185368 264448 5<\/code><\/pre>\n
\n264448 n\u00eb ZRAM \u2014 \u00ebsht\u00eb pothuajse nj\u00eb gigabajt t\u00eb dh\u00ebnash t\u00eb pa kompresuara. T\u00eb gjitha shkuan n\u00eb ZRAM dhe asgj\u00eb nuk shkoi n\u00eb skedarin e swapit q\u00eb \u00ebsht\u00eb shum\u00eb m\u00eb i ngadalsh\u00ebm. Provo k\u00ebto cil\u00ebsime vet\u00eb, ato funksionojn\u00eb n\u00eb t\u00eb gjitha modelet e Raspberry Pi. Sistemi im i paq\u00ebndruesh\u00ebm u shnd\u00ebrrua n\u00eb nj\u00eb sistem t\u00eb funksionuesh\u00ebm dhe stabil.<\/p>\n
N\u00eb t\u00eb ardhmen e af\u00ebrt shpresoj t\u00eb vazhdoj dhe t\u00eb azhurnoj k\u00ebt\u00eb artikull me disa rezultate t\u00eb testimit t\u00eb sistemit para dhe pas instalimit t\u00eb ZRAM-it. Aktualisht nuk kam koh\u00eb p\u00ebr k\u00ebt\u00eb. Nd\u00ebrkoh\u00eb, mos hezitoni t\u00eb b\u00ebni testet tuaja dhe m\u00eb tregoni n\u00eb komentet. Raspberry Pi 4 \u00ebsht\u00eb thjesht nj\u00eb kafsh\u00eb me k\u00ebto konfigurime. G\u00ebzoni!<\/p>\n
N\u00eb tem\u00eb:<\/b><\/p>\n