{"id":120994,"date":"2024-12-16T15:46:10","date_gmt":"2024-12-16T13:46:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kvm-regressii-proizvoditelnosti-i-obsuzhdenie-podderzhki-32-razryadnyh-sistem"},"modified":"2024-12-16T15:46:10","modified_gmt":"2024-12-16T13:46:10","slug":"kvm-regressii-proizvoditelnosti-i-obsuzhdenie-podderzhki-32-razryadnyh-sistem","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/kvm-regressii-proizvoditelnosti-i-obsuzhdenie-podderzhki-32-razryadnyh-sistem","title":{"rendered":"KVM: regresia performan\u021bei \u0219i discu\u021bia despre suportul sistemelor de 32 de bi\u021bi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00cen nucleul Linux 6.13-rc3 a fost adoptat\u0103 o modificare care elimin\u0103 regresia performan\u021bei \u00een hipervizorul KVM, asociat\u0103 cu procesarea lent\u0103 a apelurilor CPUID pe noile CPU-uri; de exemplu, pe CPU Intel Emerald Rapids, opera\u021biile cu CPUID se desf\u0103\u0219oar\u0103 de 3-4 ori mai lent dec\u00e2t pe CPU Intel Skylake. Aceast\u0103 caracteristic\u0103 a dus la o sc\u0103dere a performan\u021bei hipervizorului KVM, care folose\u0219te CPUID \u00een procesul de salvare \u0219i restaurare a st\u0103rii procesorului la fiecare transfer de control al ma\u0219inii virtuale, \u00een cazul utiliz\u0103rii virtualiz\u0103rii \u00eenn\u0103scute. Pentru a rezolva problema, \u00een ramura nucleului 6.13 a fost acceptat un patch scurt care a permis reducerea timpului de opera\u021bie cu p\u00e2n\u0103 la 40%, chiar \u0219i pe CPU-urile din familia Skylake, datorit\u0103 caching-ului CPUID. O versiune complet\u0103 a patch-ului va fi prezentat\u0103 \u00een nucleul 6.14, \u00eembun\u0103t\u0103\u021bind suplimentar performan\u021ba. <\/p>\n

\u00cen plus, merit\u0103 men\u021bionat discu\u021bia din lista de coresponden\u021b\u0103 a dezvoltatorilor nucleului Linux despre oprirea suportului pentru sistemele de 32 de bi\u021bi \u00een hipervizor. KVM<\/a>Ini\u021bial, pentru nucleu a fost propus un patch care elimina suportul pentru virtualizarea KVM pe platforma x86-32. Ca r\u0103spuns, au fost exprimate temeri c\u0103 suportul x86-32 ar putea fi util pentru testarea func\u021bion\u0103rii modului gazd\u0103 \u00een general pe sistemele de 32 de bi\u021bi, av\u00e2nd \u00een vedere c\u0103 \u00een nucleu, pe l\u00e2ng\u0103 x86-32, mai r\u0103m\u00e2n \u00eenc\u0103 trei arhitecturi de 32 de bi\u021bi sus\u021binute \u00een KVM. Ca r\u0103spuns, a fost prezentat un alt patch, de data aceasta elimin\u00e2nd din KVM suportul pentru toate sistemele de 32 de bi\u021bi. <\/p>\n

Dorin\u021ba de a sc\u0103pa de suportul sistemelor de 32 de bi\u021bi se explic\u0103 prin faptul c\u0103 \u0219i pe procesoarele ARM de 32 de bi\u021bi, cum ar fi ARM Cortex A7, virtualizarea nu a evoluat \u0219i utilizarea ma\u0219ini virtuale<\/a> pe sistemele de 32 de bi\u021bi ARM a fost at\u00e2t de rar\u0103 \u00eenc\u00e2t suportul acestor sisteme \u00een KVM a fost eliminat \u00een 2020, iar acest lucru nu a st\u00e2rnit obiec\u021bii. Se subliniaz\u0103 c\u0103 pentru celelalte sisteme de 32 de bi\u021bi modific\u0103rile vor afecta doar platformele exotice, care de mult\u0103 vreme nu mai sunt utilizate \u00een practic\u0103 sau care niciodat\u0103 nu au fost populare. Printre procesoarele vizate de patch se num\u0103r\u0103: Intel Core Duo\/Silverthorne, PowerPC e300\/e500\/e600 \u0219i MIPS P5600. Patch-ul a fost publicat ca RFC, adic\u0103 a fost supus discu\u021biei.
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux 6.13-rc3 \u043f\u0440\u0438\u043d\u044f\u0442\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435, \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0449\u0435\u0435 \u0440\u0435\u0433\u0440\u0435\u0441\u0441\u0438\u044e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0435 KVM, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0443\u044e \u0441 \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u043e\u0439 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u043e\u0439 \u0432\u044b\u0437\u043e\u0432\u043e\u0432 CPUID \u043d\u0430 \u043d\u043e\u0432\u044b\u0445 CPU, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043d\u0430 CPU Intel Emerald Rapids \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 c CPUID \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0442\u0441\u044f \u0432 3-4 \u0440\u0430\u0437\u0430 \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u0435\u0435, \u0447\u0435\u043c \u043d\u0430 CPU Intel Skylake. \u041f\u043e\u0434\u043e\u0431\u043d\u0430\u044f \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0438\u0432\u0435\u043b\u0430 \u043a \u0441\u043d\u0438\u0436\u0435\u043d\u0438\u044e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 KVM, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 CPUID \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0441\u043e\u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f […]<\/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-120994","post","type-post","status-publish","format-standard","hentry","category-news"],"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\udd47KVM: regresia de performan\u021b\u0103 \u0219i discu\u021bia despre suportul sistemelor de 32 de bi\u021bi | ProHoster","description":"Nucleul Linux 6.13-rc3 a primit o modificare care elimin\u0103 regresia de performan\u021b\u0103 \u00een hypervisorul KVM, legat\u0103 de procesarea lent\u0103 a apelurilor CPUID pe noile CPU, cum ar fi CPU Intel Emerald 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