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Fahamka wakhtiga Runtime Go: Jadwalka

Faallo

10 min read Via internals-for-interns.com

Mewayz Team

Editorial Team

Hacker News

hordhac: Maamulaha aan la arki karin ee Codsiyadaada Go

Marka aad qorto barnaamijka Go, waxaad diirada saartaa caqliga, hawlaha, iyo kanaalada. Waxaad ku qortaa 'go myFunction()' oo koodkaagu wuxuu u shaqeeyaa si aan kala go 'lahayn. Laakin hoosta dushiisa, kirishbooy aan la arki karin ayaa habaynaya waxqabadka, isaga oo hubinaya in hawlahaaga isla socda ay si habsami leh oo hufan u socdaan. Maestro-kan waa jadwalaha wakhtiga orodka ee Go. Fahamka sida ay u shaqeyso maaha kaliya jimicsi tacliimeed; waxa ay muhiim u tahay in la qoro wax qabad sare, software la miisaami karo. Goobaha sida Mewayz, kuwaas oo loo dhisay in ay si isku mid ah u maareeyaan hababka ganacsi ee isku dhafan, kuwa caadiga ah, ka faa'iidaysiga awoodaha jadwaleeyaha ayaa aasaas u ah bixinta nidaam hawlgal oo jawaab celin leh oo la isku halayn karo ee ganacsiyada.

Waa maxay Jadwalka Tagga iyo sababta aan ugu baahanahay?

Go waxa ay caan ku tahay qaabkeeda fudud ee awooda badan ee ku salaysan gorutines. Gorotines waa miisaan "cagaaran dun" oo ay maamusho Go runtime, ma aha nidaamka hawlgalka. Abuuritaanka kumanaan iyaga ka mid ah waa raqiis xagga xusuusta iyo kor u kaca. Si kastaba ha ahaatee, gorutines-kan ugu dambeyntii waxay u baahan yihiin inay ku shaqeeyaan dunta OS jirka, kuwaas oo aad uga culus oo xaddidan tiradooda. Jadwalaha Go waa lakabka caqliga leh ee khariidadeeya tiro aad u badan oo gorutines ah barkad yar oo dunta OS ah. Shaqadeeda aasaasiga ah waa in ay qaybiso culayska shaqada, iyada oo ka dhigaysa lacagta isdhaafsiga ah mid hufan oo la taaban karo. La'aanteed, waxaan ku xayirnaan doonnaa maaraynta dunta OS si toos ah, hawl adag oo khaladaad u nugul oo diidi doonta in badan oo ka mid ah faa'iidooyinka isdhaafsiga ee Go.

Modelka GMP: Qaab dhismeedka ubucda ee jadwalka

Jadwalaha Go wuxuu ku shaqeeyaa nooc inta badan loo yaqaan GMP, kaasoo u taagan Gorotines, OS Threads (Machines), iyo Processors. Saddexdani waxay u shaqeeyaan si wada jir ah si ay u fuliyaan koodka.

  • G (Goroutine):Kani waa unugga aasaasiga ah ee fulinta isla mar ah. Waxay ka kooban tahay xidhmada, tilmaame tilmaame, iyo macluumaadka kale ee loo baahan yahay si hawl loo qabto.
  • M (Mashiin):M waxa uu matalaa dunta OS. Waa cidda dhabta ah ee nidaamka qalliinka u qorsheeyey inuu ku shaqeeyo xudunta CPU.
  • P (Processor): A P waa processor-ka macquul ah ama macnaha guud ee jadwalka. Waxay ka dhigan tahay agabka loo baahan yahay si loo fuliyo koodka Go. P kastaa waxa uu leeyahay safka orda ee goroutines (Gs) oo diyaar u ah in uu ordo. Tirada Ps waxaa sida caadiga ah lagu dejiyay tirada koreedaha CPU ee la heli karo (GOMAXPROCS)
Xidhiidhku waa furaha: P waa in lagu xidhaa M si loo fuliyo Go koodka, M ka bacdina waxa uu sameeyaa gorutines safka maxaliga ah ee P. Soo koobidani waxay u ogolaanaysaa jadwaleeyaha inuu si hufan u maareeyo qaybinta shaqada guud ahaan xudunta CPU ee la heli karo.

Farsamoyaqaanka Jadwalka: Sida Shaqada Loo Qaybiyo

Sirdoonka jadwalaha ayaa ku jira sida uu u maareeyo safafka iyo xiriirka MP-P. Waa jadwal diyaarsan, taasoo la macno ah inay carqaladayn karto goroutine ordaya si ay kuwa kale fursad u siiyaan. Tani waxay ka hortagtaa hal goroutine in uu si aan xad lahayn u dulqaato P. Hababka muhiimka ah waxaa ka mid ah:

Xatooyo-Shaqo: Marka uu P-gu ka dhamaado gorutines safkiisa maxalliga ah, ma fadhiisto shaqo-la'aan. Taa baddalkeeda, waxay isku daydaa inay "xado" kala badh gorutines safka kale ee P. Haddii ay taasi guul dareysato, waxay hubineysaa safka orodka caalamiga ah. Tani waxay hubinaysaa in dhammaan CPU-yada lagu hayo mashquul ilaa inta ay jirto shaqo lagu qabanayo meel kasta oo nidaamka ah.

Nidaamka Wicitaannada: Marka goroutine sameeyo nidaamka xannibista (tusaale, akhrinta fayl), jadwal-hayehu wuxuu sameeyaa gacan-ku-saar. Dufanka (M) fulinaya wicitaanku wuu xanniban yahay, laakiin P ee lagu xidhay maaha mid go'an. Jadwaliyehu waxa uu gooyaa P oo uu helaa M aan shaqayn ama waxa uu abuuraa mid cusub oo lagu xidho P, si ay u sii wadato fulinta gorutines kale. Marka nidaamka wicitaanku dhammeeyo, goroutine ayaa dib loo dhigayaa safka orodka, oo M wuxuu isku dayaa inuu helo P si uu u sii wado fulinta.

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Algorithmamka xatooyada shaqada ee Jadwalaha Go waa farshaxan-yaqaan injineernimo, oo u beddelaya ururinta soo-saareyaal shaqsiyeed koox iskaashi oo si hufan u miisaama culeyska shaqada oo dhan.

Saamaynta Ku Saabsan Dhisida Nidaamyada Miisaanka Leh sida Mewayz

Model ganacsi OS sida Mewayz, halkaas oo qaybo kala duwan-laga bilaabo CRM ilaa maamulka alaabada - waa in ay u shaqeeyaan si madax banaan welina isku xidhan, design Jadwalaha Go waa faa'iido weyn. Adiga oo u qaabaynaya macquulka arjiga ee goroutines yar yar oo badan, Mewayz waxa ay ku gaadhi kartaa waxsoosaar sare. Jadwaliyehu wuxuu si toos ah ugu qaybiyaa hawlahan dhammaan xudunta CPU ee la heli karo, isaga oo hubinaya in nidaamku ahaado mid jawaab celin leh xitaa culeys culus. Soo-saareyaasha wax ka dhisaya Mewayz waxay diiradda saari karaan qorista kood cad oo modular ah oo aan lahayn dunta maaraynta-yaraha, iyagoo kalsooni ku qaba in runtime-ga hoose uu si hufan u qaban doono hawsha adag ee fulinta barbar socota. Tani waxay u sahlaysaa Mewayz in uu soo bandhigo waxqabadka iyo miisaanka ay ganacsiyada casriga ahi ka rabaan nidaamyadooda hawleed ee asaasiga ah.

Su'aalaha Inta badan La Isweydiiyo

hordhac: Sameeyaha aan la arki karin ee Codsiyadaada Go

Marka aad qorto barnaamijka Go, waxaad diirada saartaa caqliga, hawlaha, iyo kanaalada. Waxaad ku qortaa 'go myFunction()' oo koodkaagu wuxuu u shaqeeyaa si aan kala go 'lahayn. Laakin hoosta dushiisa, kirishbooy aan la arki karin ayaa habaynaya waxqabadka, isaga oo hubinaya in hawlahaaga isla socda ay si habsami leh oo hufan u socdaan. Maestro-kan waa jadwalaha wakhtiga orodka ee Go. Fahamka sida ay u shaqeyso maaha kaliya jimicsi tacliimeed; waxa ay muhiim u tahay in la qoro wax qabad sare, software la miisaami karo. Goobaha sida Mewayz, kuwaas oo loo dhisay in ay si isku mid ah u maareeyaan hababka ganacsi ee isku dhafan, kuwa caadiga ah, ka faa'iidaysiga awoodaha jadwaleeyaha ayaa aasaas u ah bixinta nidaam hawlgal oo jawaab celin leh oo la isku halayn karo ee ganacsiyada.

Waa maxay Jadwalka Tagga iyo sababta aan ugu baahanahay?

Go waxa ay caan ku tahay qaabkeeda fudud ee awooda badan ee ku salaysan gorutines. Gorotines waa miisaan "cagaaran dun" oo ay maamusho Go runtime, ma aha nidaamka hawlgalka. Abuuritaanka kumanaan iyaga ka mid ah waa raqiis xagga xusuusta iyo kor u kaca. Si kastaba ha ahaatee, gorutines-kan ugu dambeyntii waxay u baahan yihiin inay ku shaqeeyaan dunta OS jirka, kuwaas oo aad uga culus oo xaddidan tiradooda. Jadwalaha Go waa lakabka caqliga leh ee khariidadeeya tiro aad u badan oo gorutines ah barkad yar oo dunta OS ah. Shaqadeeda aasaasiga ah waa in ay qaybiso culayska shaqada, iyada oo ka dhigaysa lacagta isdhaafsiga ah mid hufan oo la taaban karo. La'aanteed, waxaan ku xayirnaan doonnaa maaraynta dunta OS si toos ah, hawl adag oo khaladaad u nugul oo diidi doonta in badan oo ka mid ah faa'iidooyinka isdhaafsiga ee Go.

Modelka GMP: Qaab dhismeedka ubucda ee Jadwalka

Jadwalaha Go wuxuu ku shaqeeyaa nooc inta badan loo yaqaan GMP, kaasoo u taagan Gorotines, OS Threads (Machines), iyo Processors. Saddexdani waxay u shaqeeyaan si wada jir ah si ay u fuliyaan koodka.

Farsamoyaqaanka Jadwalka: Sida Shaqada Loo Qaybiyo

Sirdoonka jadwalaha ayaa ku jira sida uu u maareeyo safafka iyo xiriirka MP-P. Waa jadwal diyaarsan, taasoo la macno ah inay carqaladayn karto goroutine ordaya si ay kuwa kale fursad u siiyaan. Tani waxay ka hortagtaa hal goroutine in uu si aan xad lahayn u dulqaato P. Hababka muhiimka ah waxaa ka mid ah:

Saamaynta Ku Saabsan Dhisida Nidaamyada Miisaanka Leh sida Mewayz

Model ganacsi OS sida Mewayz, halkaas oo qaybo kala duwan-laga bilaabo CRM ilaa maamulka alaabada - waa in ay u shaqeeyaan si madax banaan welina isku xidhan, design Jadwalaha Go waa faa'iido weyn. Adiga oo u qaabaynaya macquulka arjiga ee goroutines yar yar oo badan, Mewayz waxa ay ku gaadhi kartaa waxsoosaar sare. Jadwaliyehu wuxuu si toos ah ugu qaybiyaa hawlahan dhammaan xudunta CPU ee la heli karo, isaga oo hubinaya in nidaamku ahaado mid jawaab celin leh xitaa culeys culus. Soo-saareyaasha wax ka dhisaya Mewayz waxay diiradda saari karaan qorista kood cad oo modular ah oo aan lahayn dunta maaraynta-yaraha, iyagoo kalsooni ku qaba in runtime-ga hoose uu si hufan u qaban doono hawsha adag ee fulinta barbar socota. Tani waxay u sahlaysaa Mewayz in uu soo bandhigo waxqabadka iyo miisaanka ay ganacsiyada casriga ahi ka rabaan nidaamyadooda hawleed ee asaasiga ah.

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