{"id":161903,"date":"2026-02-20T17:11:55","date_gmt":"2026-02-20T15:11:55","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/razrabotchik-io_uring-vyyavil-v-qemu-problemu-v-50-80-raz-zamedlyavshuyu-fdmon-v-rezhime-prostoya"},"modified":"2026-02-20T17:11:55","modified_gmt":"2026-02-20T15:11:55","slug":"razrabotchik-io_uring-vyyavil-v-qemu-problemu-v-50-80-raz-zamedlyavshuyu-fdmon-v-rezhime-prostoya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/novosti-interneta\/razrabotchik-io_uring-vyyavil-v-qemu-problemu-v-50-80-raz-zamedlyavshuyu-fdmon-v-rezhime-prostoya","title":{"rendered":"Zhvilluesi io_uring zbuloi n\u00eb QEMU nj\u00eb problem q\u00eb ngadal\u00ebsonte fdmon n\u00eb m\u00ebnyr\u00eb t\u00eb papritur me 50-80 her\u00eb","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Jens Axboe, krijuesi i io_uring dhe planifikuesve t\u00eb input\/output CFQ, Deadline dhe Noop, ofroi p\u00ebrfshirjen n\u00eb baz\u00ebn e kodit t\u00eb emulatorit QEMU nj\u00eb patch q\u00eb redukton vonesat nga 50 deri n\u00eb 80 her\u00eb kur p\u00ebrdoret fdmon (monitorimi i file descriptor) n\u00eb modein 'aio=io_uring' dhe kur sistemi ndodhet n\u00eb gjendje pritjeje. <\/p>\n

Problemi shfaqej p\u00ebr shkak t\u00eb kalimit t\u00eb operacionit ppoll() n\u00eb gjendje gjumi me nj\u00eb koh\u00eb skadimi prej 499 ms, p\u00ebrkund\u00ebr pranis\u00eb s\u00eb hyrjes\/jesh\u00ebve. P\u00ebr t\u00eb rikthyer kryerjen e ciklit kryesor t\u00eb p\u00ebrpunimit t\u00eb ngjarjeve, i cili ishte pezulluar p\u00ebr shkak t\u00eb ppoll(), \u00ebsht\u00eb propozuar nj\u00eb patch q\u00eb shton n\u00eb funksionin e krijimit t\u00eb regjistrimit SQE (Submission Queue Entry) thirrjen e funksionit aio_notify(), i cili e nxjerr ppoll() nga gjendja e gjumit. <\/p>\n

Problemi doli gjat\u00eb testeve regresore t\u00eb io_uring n\u00eb makinat virtuale<\/a> me pajisje t\u00eb ndryshme bllokuese. Jens vuri re se ndodhte rast\u00ebsisht q\u00eb t\u00eb shfaqeshin koh\u00eb e tejkalimeve gjat\u00eb p\u00ebrdorimit t\u00eb pajisjeve AHCI\/SATA n\u00eb modin 'aio=io_uring', nd\u00ebrsa n\u00eb konfigurime me pajisje virtio-blk ose nvme testet gjithmon\u00eb p\u00ebrfundonin me sukses pas rreth nj\u00eb sekondi. Megjithat\u00eb, theksohet se problemi prek t\u00eb gjitha llojet e pajisjeve bllokuese, por p\u00ebr pajisjet AHCI\/SATA, shfaqja e vonesave \u00ebsht\u00eb m\u00eb e dukshme p\u00ebr shkak t\u00eb p\u00ebrdorimit t\u00eb MMIO. <\/p>\n

Jens gjithashtu p\u00ebrshkroi p\u00ebrvoj\u00ebn e tij n\u00eb debugin e nj\u00eb problemi duke p\u00ebrdorur asistentin AI Claude. Pasi p\u00ebrcaktoi nj\u00eb skenar q\u00eb riprodhonte kushtet p\u00ebr ndodhj\u00ebn e timeout-it, ai i d\u00ebrgoi t\u00eb dh\u00ebnat e disponueshme t\u00eb debuginit Claude, i ofroi qasje n\u00eb makin\u00ebn virtuale dhe sugjeroi t\u00eb p\u00ebrcaktonte shkaktar\u00ebt e mundsh\u00ebm t\u00eb defektit t\u00eb zbuluar. <\/p>\n

Claude vendosi t\u00eb kontrollonte n\u00ebse do t\u00eb ngadal\u00ebsohej performanca gjat\u00eb p\u00ebrdorimit t\u00eb pajisjes virtio-blk dhe ekzekutoi nj\u00eb skenar shkat\u00ebrrues t\u00eb propozuar nga zhvilluesi, q\u00eb riprodhonte problemin. Gjat\u00eb verifikimit, u fshin 128 MB e para e p\u00ebrmbajtjes nga pajisja bllokuese \/dev\/vda n\u00eb makin\u00ebn virtuale. Pas k\u00ebsaj, Claude arriti n\u00eb p\u00ebrfundimin se problemi nuk ishte n\u00eb virtio-blk. Kur Jens i tha asistentit AI t\u00eb fshinte nj\u00eb pjes\u00eb t\u00eb p\u00ebrmbajtjes nga \/dev\/vda, ai p\u00ebrgjigjej 'Po, e kam b\u00ebr\u00eb k\u00ebt\u00eb', dhe pas k\u00ebrkes\u00ebs p\u00ebr t\u00eb riparuar\u2014riktheu funksionalitetin e diskut virtual \/dev\/vda. Theksohet se p\u00ebrdorimi i asistentit AI ndihmoi n\u00eb kuptimin m\u00eb t\u00eb mir\u00eb t\u00eb ve\u00e7orive t\u00eb ekzekutimit t\u00eb cikleve t\u00eb ndryshme t\u00eb procesimit t\u00eb ngjarjeve n\u00eb QEMU. <\/p>\n

\u00cbsht e r\u00ebnd\u00ebsishme t\u00eb theksohet se problemi ishte mjaft i v\u00ebshtir\u00eb p\u00ebr t'u zbuluar, sepse n\u00eb testet sintetike nuk v\u00ebrehet ngadal\u00ebsimi, p\u00ebr shkak se shfaqja e \u00e7rregullimit ndikohet nga zgjerimi i ciklit t\u00eb p\u00ebrpunimit t\u00eb ngjarjeve me ppoll p\u00ebr shkak t\u00eb aktiviteteve t\u00eb tjera, dhe testet sintetike t\u00eb hyrjes\/daljes nuk e trajtojn\u00eb p\u00ebrpunimin e t\u00eb dh\u00ebnave t\u00eb marra. Ngadal\u00ebsimi u b\u00eb m\u00eb i duksh\u00ebm kur u shtuan disa thirrje usleep() p\u00ebr t\u00eb simuluar p\u00ebrpunimin e t\u00eb dh\u00ebnave. <\/p>\n

Para korrigjimit n\u00eb sistemin n\u00eb gjendje pushimi (idle): time sudo .\/iotest \/dev\/sda Ekzekutuar n\u00eb 25.76 secs fish jasht\u00eb usr time 6.19 millis 783.00 micros 5.41 millis sys time 12.43 millis 642.00 micros 11.79 millis <\/p>\n

Pas korrigjimit n\u00eb sistemin n\u00eb gjendje pushimi: time sudo .\/iotest \/dev\/sda Ekzekutuar n\u00eb 1.30 secs fish jasht\u00eb usr time 2.14 millis 0.14 millis 2.00 millis sys time 16.93 millis 1.16 millis 15.76 millis
\n
Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0419\u0435\u043d\u0441 \u042d\u043a\u0441\u0431\u043e (Jens Axboe), \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c io_uring \u0438 \u043f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u043e\u0432 \u0432\u0432\u043e\u0434\u0430\/\u0432\u044b\u0432\u043e\u0434\u0430 CFQ, Deadline \u0438 Noop, \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0438\u043b \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432 \u043a\u043e\u0434\u043e\u0432\u0443\u044e \u0431\u0430\u0437\u0443 \u044d\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0430 QEMU \u043f\u0430\u0442\u0447, \u0432 50-80 \u0440\u0430\u0437 \u0441\u043e\u043a\u0440\u0430\u0449\u0430\u044e\u0449\u0438\u0439 \u0437\u0430\u0434\u0435\u0440\u0436\u043a\u0438 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 fdmon (file descriptor monitoring) \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 «aio=io_uring» \u0438 \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0432 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u043f\u0440\u043e\u0441\u0442\u043e\u044f (idle). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u043b\u0430\u0441\u044c \u0438\u0437-\u0437\u0430 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 ppoll() \u0432 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u0441\u043d\u0430 \u0441 \u0442\u0430\u0439\u043c\u0430\u0443\u0442\u043e\u043c 499 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-161903","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\udd47Zhvilluesi i io_uring identifikoi nj\u00eb problem n\u00eb QEMU, i cili ngadal\u00ebsonte fdmon n\u00eb modalitetin pushimi me 50-80 her\u00eb | ProHoster","description":"Jens Axboe, krijuesi i io_uring dhe planifikuesve t\u00eb hyrjes\/daljes CFQ, Deadline dhe Noop, propozi p\u00ebrfshirjen n\u00eb kodin burimor t\u00eb emulatorit QEMU nj\u00eb patch, i cili redukton vonesat p\u00ebr monitorimin e descriptorit t\u00eb skedar\u00ebve (fdmon) n\u00eb modalitetin \"aio=io_uring\" dhe kur sistemi \u00ebsht\u00eb n\u00eb gjendje pushimi (idle) nga 50-80 her\u00eb. 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\u0440\u0430\u0431\u043e\u0442\u0435 fdmon (file descriptor monitoring) \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 "aio=io_uring" \u0438 \u043d\u0430\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0432 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u043f\u0440\u043e\u0441\u0442\u043e\u044f (idle). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u043b\u0430\u0441\u044c \u0438\u0437-\u0437\u0430 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 ppoll() \u0432 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u0441\u043d\u0430 \u0441 \u0442\u0430\u0439\u043c\u0430\u0443\u0442\u043e\u043c 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