I-InfiniBand ne-RDMA Networking
I-InfiniBand iyisixhumi esinesivinini esikhulu, sokubambezeleka esiphansi esixhumanisa amaseva nama-GPU kumaqoqo e-AI, futhi i-RDMA ivumela umshini owodwa ukuthi ufunde noma ubhale inkumbulo yomunye ngaphandle kokubandakanya i-CPU.
Uhlolojikelele
Together they are the plumbing that keeps thousands of GPUs fed with data during large-model training.
I-Deep Dive
Uma uqeqesha imodeli ezinkulungwaneni zama-GPU, inethiwekhi ivamise ukuba yibhodlela, hhayi ama-chips. I-InfiniBand iyinhloso yendwangu eshintshiwe eyakhelwe lokhu: inikeza umkhawulokudonsa wesixhumanisi ngasinye kumakhulukhulu amagigabhithi ngomzuzwana (i-NDR isebenza ku-400 Gb/s) kanye ne-microsecond-scale latency. Iqhinga layo elingukhiye I-Remote Direct Memory Access (RDMA), ehambisa idatha ngokuqondile phakathi kwenkumbulo yamanodi amabili, idlule i-kernel yesistimu yokusebenza namakhophi e-CPU abambezela i-TCP/IP evamile. Le 'kernel bypass' ikhulula imijikelezo ye-CPU futhi inciphise ukubambezeleka. I-InfiniBand iphinde inikeze ngokulawula ukugeleza kwehadiwe kwendwangu engalahleki, futhi amaswishi e-NVIDIA's Quantum kanye nama-adaptha e-ConnectX abusa amakhompyutha amakhulu e-AI. I-RoCE (i-RDMA phezu kwe-Converged Ethernet) iletha izinzuzo ezifanayo ze-RDMA kumanethiwekhi e-Ethernet.
I-Technical Insight
I-RDMA isebenza ngezenzo namapheya olayini. Isicelo sithumela izicelo zomsebenzi zokuthumela nokwamukela imigqa; i-adaptha yenethiwekhi (i-HCA) iyazifunda futhi idlulisele idatha ngokuqondile ezindaweni ezibhaliswe ngaphambili, eziphiniwe kumsingathi wesilawuli kude. Ngenxa yokuthi i-NIC iphethe ukudluliswa kwezingxenyekazi zekhompuyutha futhi i-OS kernel idlulwa, akhona amakhophi edatha ayiziro futhi awekho i-CPU yephakethe ngalinye eliphazamisayo ekudlulisweni kwenqwaba. Isixhumanisi sesendlalelo se-InfiniBand sokulawula ukugeleza okusekelwe kukhredithi kuvimbela ukuchichima kwe-buffer, okwenza indwangu ingalahleki ngaphandle kweziphepho zokudlulisela kabusha.
I-Strategic Impact
Izindleko kanye nesabelomali
Izinqumo zezakhiwo ziqhuba ukusebenza kanye nezindleko zokusebenza iminyaka.
Izinqumo ezicacile
Imfundo yobuchwepheshe isiza amaqembu ukuthi akhethe isitaki esifanele, hhayi nje esisha.
Ukulawulwa kwekhwalithi
Izinketho ezingcono zobunjiniyela zinciphisa izehlakalo ezinokwethenjelwa ekukhiqizeni.
Ikusasa le-InfiniBand kanye ne-RDMA Networking
Umkhawulokudonsa ulokhu ukhuphuka: I-XDR InfiniBand iqondise ku-800 Gb/s ngesixhumanisi ngasinye, ngamamephu omgwaqo abheke ku-1.6 Tb/s. Ukuncintisana kuya ngokushuba njengoba i-Ultra Ethernet Consortium iklama i-Ethernet efana ne-InfiniBand yomthwalo we-AI, futhi njengoba i-in-network computing (SHARP) ikhipha izibalo ezihlangene kumaswishi ngokwawo. Lindela ukuhlanganiswa kwe-GPU-to-network okuqinile, ukuxhuma okubonakalayo ukuze unqamule amandla, nezindwangu ezikalwa zaba ngamaqoqo amakhulu ezinkulungwane zama-accelerator njengoba amamodeli asemngceleni ekhula.
Ukuqaliswa Komhlaba Wangempela
Ukuxhuma izinkulungwane zama-GPU kukhompuyutha enkulu ye-AI ukuze idatha ye-gradient ihambe phakathi kwama-node kuma-microsecond ngesikhathi sokuqeqeshwa esabalalisiwe
Ukuvumela iseva eyodwa ukuthi ifunde inkumbulo yomunye ngokuqondile (i-RDMA) ukuze kusheshiswe amasistimu wefayela asabalalisiwe kanye nemininingwane yolwazi ngaphandle kwe-CPU ngaphezulu.
Isebenzisa i-NCCL yokwehlisa konke ukusebenza nge-InfiniBand ukuze ivumelanise izisindo zemodeli kulo lonke iqoqo le-GPU
Ukusebenzisa i-RoCE ukuletha ukudluliswa kwesitayela esiphansi se-RDMA kumanethiwekhi akhona esikhungo sedatha se-Ethernet
Izingozi & Guardrails
Ukuthuthukisa ibhentshimakhi eyodwa kungafihla ubuthakathaka obubanzi besistimu.
Izindleko zengqalasizinda nezokulungisa zivame ukubukelwa phansi.
Izikhala zokuphepha nokubonakala zingakhula njengoba izinhlelo ziba nzima kakhulu.
Ukuqalisa Umhlahlandlela
Chaza ukubambezeleka, ikhwalithi, nezindleko ezihlosiwe ngaphambi kokuqaliswa.
Ibhentshimakhi ngaphansi komthwalo wangempela nezimo zedatha.
Ukuqapha amathuluzi amaphutha, ukukhukhuleka, nomthelela wabasebenzisi.
Lungiselela izindlela zokuhlehlisa nezigameko ngaphambi kokukala.
Qhubeka Uhlole
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Umhlahlandlela olandelayo
Faka Amapayipi Obunjiniyela kanye Nokuguqulwa Kwedatha
Imibuzo evame ukubuzwa
What is InfiniBand and RDMA Networking?
I-InfiniBand iyisixhumi esinesivinini esikhulu, sokubambezeleka esiphansi esixhumanisa amaseva nama-GPU kumaqoqo e-AI, futhi i-RDMA ivumela umshini owodwa ukuthi ufunde noma ubhale inkumbulo yomunye ngaphandle kokubandakanya i-CPU. Ngokuhlangene zingamapayipi agcina izinkulungwane zama-GPU zondliwa ngedatha ngesikhathi sokuqeqeshwa kwamamodeli amakhulu.
Ngabe i-RDMA ivumela ikhompuyutha eyodwa ukuthi yenzeni?
Ukufinyelela Kwenkumbulo Eqondile Kukude kuhambisa idatha iqonde phakathi kwenkumbulo yamanodi amabili, kudlule i-OS kernel namakhophi e-CPU, okunqamula ukubambezeleka futhi kukhulule imijikelezo ye-CPU.
Kungani i-InfiniBand ifinyelela ukubambezeleka okuphansi kakhulu kunenethiwekhi evamile ye-TCP/IP?
Ama-adaptha e-InfiniBand adlulisela idatha ngokuqondile/kusuka kumemori ephiniwe kuhadiwe futhi adlule i-OS kernel, asuse ukuphazamiseka kwe-CPU yephakethe ngalinye namakhophi edatha.
Cishe yimuphi umkhawulokudonsa wesixhumanisi ngasinye ehlinzekwa yi-NDR InfiniBand?
I-NDR (Next Data Rate) I-InfiniBand isebenza ku-400 Gb/s ilinki ngayinye, kanti i-XDR iqondise ku-800 Gb/s esizukulwaneni esilandelayo.
Ku-RDMA, 'amapheya olayini' asetshenziselwa ini?
Izicelo zokuthumela izicelo zomsebenzi zokuthumela nokwamukela imigqa (amapheya olayini); i-adaptha yesiteshi somsingathi iyazifunda futhi yenze ukudluliselwa kwememori okuqondile.
Yini i-RoCE?
I-RoCE imele i-RDMA phezu kwe-Converged Ethernet, evumela ukubambezeleka okuphansi, ukudluliselwa kwe-kernel-bypass ezindwangu ezijwayelekile ze-Ethernet esikhundleni se-InfiniBand yomdabu.