{"id":105072,"date":"2022-09-12T15:37:54","date_gmt":"2022-09-12T13:37:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/seryoznoe-snizhenie-proizvoditelnosti-yadra-5-19-vyzvannoe-zashhitoj-ot-ataki-retbleed"},"modified":"2022-09-12T15:37:54","modified_gmt":"2022-09-12T13:37:54","slug":"seryoznoe-snizhenie-proizvoditelnosti-yadra-5-19-vyzvannoe-zashhitoj-ot-ataki-retbleed","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/seryoznoe-snizhenie-proizvoditelnosti-yadra-5-19-vyzvannoe-zashhitoj-ot-ataki-retbleed","title":{"rendered":"Ulje t\u00eb ndjeshme t\u00eb performanc\u00ebs s\u00eb b\u00ebrtham\u00ebs 5.19, e shkaktuar nga mbrojtja kund\u00ebr sulmit Retbleed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nj\u00eb inxhinier i kompanis\u00eb VMware i ka t\u00ebrhequr v\u00ebmendjen comunitetit t\u00eb zhvilluesve t\u00eb kernelit Linux p\u00ebr nj\u00eb r\u00ebnie t\u00eb dukshme t\u00eb performanc\u00ebs gjat\u00eb p\u00ebrdorimit t\u00eb kernelit Linux 5.19. Testimi i nj\u00eb makine virtuale me kernel 5.19 n\u00eb mjedisin e hipervizorit VMware ESXi tregoi nj\u00eb r\u00ebnie t\u00eb performanc\u00ebs s\u00eb llogaritjeve prej 70%, operacioneve rrjetore prej 30%, dhe veprimeve me ruajtjen prej 13%, krahasuar me t\u00eb nj\u00ebjt\u00ebn konfigurim me kernel 5.18. <\/p>\n

Si shkak p\u00ebr r\u00ebnien e performanc\u00ebs p\u00ebrmendet ndryshimi n\u00eb kodin e mbrojtjes nga sulmet e klas\u00ebs Spectre v2 (spectre_v2=ibrs), e cila \u00ebsht\u00eb implementuar mbi baza t\u00eb instruksioneve t\u00eb p\u00ebrmir\u00ebsuara IBRS (Enhanced Indirect Branch Restricted Speculation), q\u00eb lejojn\u00eb adaptivisht t\u00eb lejojn\u00eb dhe ndalojn\u00eb ekzekutimin spekulator t\u00eb instruksioneve gjat\u00eb trajtimit t\u00eb nd\u00ebrprerjeve, thirrjeve sistemike dhe nd\u00ebrrimeve t\u00eb kontekstit. Mbrojtja \u00ebsht\u00eb aktivizuar p\u00ebr t\u00eb bllokuar nj\u00eb cenueshm\u00ebri t\u00eb sapoidentifikuar, Retbleed, n\u00eb mekanizmin e ekzekutimit spekulator t\u00eb kalimeve indirekte t\u00eb CPU, q\u00eb lejon nxjerrjen e informacionit nga memoria e kernelit ose organizimin e nj\u00eb sulmi ndaj sistemit prit\u00ebs nga makinave virtuale<\/a>. Pasi mbrojtja \u00ebsht\u00eb e \u00e7aktivizuar (spectre_v2=off), performanca kthehet n\u00eb nivelet e m\u00ebparshme.
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0418\u043d\u0436\u0435\u043d\u0435\u0440 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 VMware \u043e\u0431\u0440\u0430\u0442\u0438\u043b \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u0441\u043e\u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 \u044f\u0434\u0440\u0430 Linux \u043d\u0430 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u044f\u0434\u0440\u0430 Linux 5.19. \u0422\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u043e\u0439 \u043c\u0430\u0448\u0438\u043d\u044b \u0441 \u044f\u0434\u0440\u043e\u043c 5.19 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0438 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 VMware ESXi \u043f\u043e\u043a\u0430\u0437\u0430\u043b\u043e \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u043d\u0430 70%, \u0441\u0435\u0442\u0435\u0432\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u043d\u0430 30% \u0438 \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u0439 \u0441 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435\u043c \u043d\u0430 13%, \u043f\u043e \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u044e \u0441 \u0442\u043e\u0439 \u0436\u0435 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0435\u0439 \u043d\u0430 \u0431\u0430\u0437\u0435 \u044f\u0434\u0440\u0430 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105072","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47R\u00ebnia serioze e performanc\u00ebs t\u00eb kernelit 5.19, e shkaktuar nga mbrojtja nga sulmi Retbleed | ProHoster","description":"Nj\u00eb inxhinier i kompanis\u00eb VMware i ka t\u00ebrhequr v\u00ebmendjen comunitetit t\u00eb zhvilluesve t\u00eb kernelit Linux p\u00ebr nj\u00eb r\u00ebnie t\u00eb dukshme t\u00eb performanc\u00ebs gjat\u00eb p\u00ebrdorimit t\u00eb kernelit Linux 5.19. 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