{"id":38045,"date":"2019-10-31T22:21:21","date_gmt":"2019-10-31T19:21:21","guid":{"rendered":"https:\/\/prohoster.info\/blog\/sravnenie-proizvoditelnosti-setevogo-drajvera-v-variantah-na-10-yazykah-programmirovaniya\/"},"modified":"2019-10-31T22:21:21","modified_gmt":"2019-10-31T19:21:21","slug":"sravnenie-proizvoditelnosti-setevogo-drajvera-v-variantah-na-10-yazykah-programmirovaniya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/sravnenie-proizvoditelnosti-setevogo-drajvera-v-variantah-na-10-yazykah-programmirovaniya","title":{"rendered":"V\u00f5rgu draiveri j\u00f5udluse v\u00f5rdlus 10 programmeerimiskeele variandis","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Saksa \u00fclikoolide teadlaste grupp avalikustasin<\/a><\/noindex> tulemused katse<\/a><\/noindex>, mille k\u00e4igus t\u00f6\u00f6tati v\u00e4lja 10 t\u00fc\u00fcpilise draiveri varianti 10-gigabitiste Intel Ixgbe (X5xx) v\u00f5rgukaartide jaoks erinevates programmeerimiskeeltes. Draiver t\u00f6\u00f6tab kasutajaruumi tasandil ja on kirjutatud keeltes C, Rust, Go, C#, Java, OCaml, Haskell, Swift, JavaScript ja Python. Koodi kirjutamisel p\u00f6\u00f6rati erilist t\u00e4helepanu maksimaalse j\u00f5udluse saavutamisele, arvestades iga keele erip\u00e4ra. Funktsionaalselt on k\u00f5ik variandid identsed ja koosnevad ligikaudu 1000 rea koodist. Projekti tulemused jaotatakse<\/a><\/noindex> BSD litsentsi alusel.<\/p>\n

Rust keeles kirjutatud draiveri variant osutus j\u00f5udluse poolest v\u00e4ga l\u00e4hedaseks C keeles kirjutatud standarddraiverile. Kui testiti 32 pakendi saatmise koormust, j\u00e4i Rust-draiver veidi maha, kuid testides, kus oli \u00fcle 32 pakendi bloki kohta, ei erinenud see kiiruselt peaaegu \u00fcldse C draiverist ning n\u00e4itas j\u00f5udlust 28 miljoni paketi t\u00f6\u00f6tlemisel sekundis Xeon E3-1230 v2 3.3 GHz protsessoriga serveris.<\/p>\n

\"V\u00f5rgu<\/a><\/noindex><\/center><\/p>\n

J\u00e4rjestuse j\u00e4rgmine ni\u0161\u0161 j\u00f5udluses h\u00f5ivasid Go ja C# keele draiverid, mis n\u00e4itasid piisavalt sarnaseid tulemusi (Go draiver v\u00f5itis testides, kus oli kuni 16 paketti, ja hakkas veidi kaotama testides, kus oli rohkem kui 16 paketti plokis). 256 paketiga plokis oli C# draiveri tipp j\u00f5udlus umbes 28 miljonit paketti sekundis, samas kui Go draiveri tipp oli umbes 25 miljonit paketti sekundis. <\/p>\n

J\u00e4rgmise sarnaste tulemustega j\u00e4rgnesid draiverid
\nJava, OCaml ja Haskell, mis j\u00e4id juba m\u00e4rgatavalt maha varem k\u00e4sitletud variantidest ja ei suutnud \u00fcletada 12 miljoni paketi piiri sekundis. Veelgi suuremat maha j\u00e4\u00e4mist n\u00e4itasid Swift ja JavaScript draiverid, mis suutsid t\u00f6\u00f6delda vooge tasemel 5 miljonit paketti sekundis. <\/p>\n

Pythonis loodud draiver testis, mis suutis t\u00f6\u00f6delda vaid 0.14 miljonit paketti sekundis. Pythoni teostust kasutati t\u00f5lgendite t\u00f6\u00f6kiirusete hindamiseks JIT-ita ja ilma spetsiifiliste optimeeringuteta (kood jooksis CPython 3.7 peal ja ei olnud \u00fchilduv PyPy-ga, kuid m\u00e4rgitakse, et andmestruktuuride optimeerimine v\u00f5iks t\u00f5sta j\u00f5udlust umbes 10 korda).<\/p>\n

T\u00e4iendavalt viidi l\u00e4bi Latentsuse testi, mis n\u00e4itas vahem\u00e4lu efektiivsust ja pr\u00fcgikoristaja m\u00f5ju. Testimise k\u00e4igus m\u00f5\u00f5deti latentsus p\u00e4rast iga paketi suunamist draiveri poolt v\u00f5rreldes t\u00e4pselt teada oleva saatmissajaga. Juhtivateks osutusid endiselt C ja Rust draiverid, mille tulemused olid praktiliselt eristatavad 1 miljoni paketi sekundis (umbes 20 \u03bcs) voos. Hea tulemuse saavutas ka Go keele draiver, mis j\u00e4i vaid veidi maha liidritest ja p\u00fcsis samuti 20 \u03bcs tasemel. C# draiver n\u00e4itas latentsust umbes 50 \u03bcs.
\nSuurimaid latentsusi n\u00e4itasid JavaScript ja Java draiverid (latentsus \u00fcle 300 \u03bcs).<\/p>\n

\"V\u00f5rgu<\/a><\/noindex><\/center><\/p>\n

Uuringu eesm\u00e4rk oli hinnata v\u00f5imalusi arendada draivereid ja operatsioonis\u00fcsteemi komponente k\u00f5rgema taseme keeltes kui C. Praegu on 39-st 40-st m\u00e4luga seotud probleemist Linuxis seotud draiveritega, seega on k\u00fcsimused turvalisema keele kasutamise ja draiverite viimise tuumast kasutaja ruumi edasi l\u00fckkunud<\/a><\/noindex> ning tootjad katsetavad aktiivselt selles suunas (n\u00e4iteks on Google v\u00e4lja t\u00f6\u00f6tanud TCP-steki OS-ile Fuchsia<\/a><\/noindex> keeles Go, ettev\u00f5te CloudFlare loobis<\/a><\/noindex> rakenduse protokolli QUIC keeles Rust, ettev\u00f5te Apple on toonud TCP-steki mobiilseadmetes kasutaja ruumi).<\/p>\n

T\u00f6\u00f6deldud teabe p\u00f5hjal v\u00f5ib j\u00e4reldada, et Rust on parim kandidaat draiverite v\u00e4ljat\u00f6\u00f6tamiseks. Rusti pakutavad v\u00f5imalused v\u00f5imaldavad k\u00f5rvaldada probleemid, mis tulenevad madala taseme m\u00e4lu k\u00e4sitsemisest, andes juurde umbes 2%-10% j\u00f5udluse languse v\u00f5rreldes C keeles kirjutatud draiveritega. Ka Go ja C# on tunnustatud sobilikena s\u00fcsteemikomponentide loomiseks, kui on vastuv\u00f5etavad viivitused millisekundite osas, mis on p\u00f5hjustatud pr\u00fcgifunktsiooni kasutamisest.<\/p>\n

<\/a><\/noindex><\/p>\n

Allikas: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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