Overview
InfiniBand ndeyekumhanya-mhanya, yakaderera-latency yekubatanidza inobatanidza maseva uye maGPU mumasumbu eAI, uye RDMA inorega mumwe muchina uverenge kana kunyora ndangariro yemumwe usingabatanidzire CPU. Pamwe chete iwo mapombi anochengeta zviuru zveGPU zvakadyiswa nedata panguva yakakura-modhi yekudzidziswa.
InfiniBand uye RDMA Networking inyanzvi yekuvaka inobata mhando yemhando, mutengo wezvivakwa, latency, uye kuvimbika pachiyero.
Deep Dive
Paunodzidzisa modhi kuzviuru zveGPU, network inowanzova iyo bhodhoro, kwete machipi. InfiniBand ishanduko yejira chinangwa-yakagadzirirwa izvi: inopa per-link bandwidth mumazana egigabits pasekondi (NDR inomhanya pa400 Gb / s) uye microsecond-scale latency. Hunyengeri hwayo hwakakosha ndeye Remote Direct Memory Access (RDMA), iyo inofambisa data zvakananga pakati pendangariro dzenodhi mbiri, ichipfuura iyo inoshanda-system kernel uye CPU makopi anononoka akajairwa TCP/IP. Iyi 'kernel bypass' inosunungura CPU kutenderera uye inorova latency. InfiniBand inopawo hardware kuyerera kudzora kwejira risingarasikike, uye NVIDIA's Quantum switch pamwe neConnectX adapter inotonga AI supercomputers. RoCE (RDMA pamusoro peConverged Ethernet) inounza zvakafanana RDMA mabhenefiti kune Ethernet network.
Technical Insight
RDMA inoshanda kuburikidza nezviito uye mutsara pairi. Chikumbiro chinotumira zvikumbiro zvebasa kutumira uye kugamuchira mitsetse; iyo network adapta (iyo HCA) inovaverenga uye inoendesa data zvakananga munzvimbo dzakanyoreswa, dzakapinirwa ndangariro pane ari kure. Nekuti iyo NIC inobata kuchinjisa muhardware uye OS kernel inopfuudzwa, kune zero data makopi uye hapana per-packet CPU inovhiringidza kutamisa kwakawanda. InfiniBand's link-layer credit-based flow control inodzivirira buffer mafashama, ichiita kuti jira risarasikirwa pasina retransmission madutu.
Mastering InfiniBand uye RDMA Networking
InfiniBand ndeyekumhanya-mhanya, yakaderera-latency yekubatanidza inobatanidza maseva uye maGPU mumasumbu eAI, uye RDMA inorega mumwe muchina uverenge kana kunyora ndangariro yemumwe usingabatanidzire CPU. Pamwe chete iwo mapombi anochengeta zviuru zveGPU zvakadyiswa nedata panguva yakakura-modhi yekudzidziswa. InfiniBand uye RDMA Networking inyanzvi yekuvaka inobata mhando yemhando, mutengo wezvivakwa, latency, uye kuvimbika pachiyero. Kuti uvake kunzwisisa kwakadzama, bata InfiniBand uye RDMA Networking semuenzaniso wekushandisa, kwete chinhu chimwe chete: tsanangura zvinodikanwa, kujekesa fungidziro, uye patsanura izvo zvinogonekwa nehurongwa hwakavimbika kubva kune izvo zvichiri kuda kutonga kwenyanzvi.
Mukuita, zvikwata zvakasimba zvinoshandisa InfiniBand uye RDMA Networking inogadzirisa zvivakwa, data, uye sarudzo dzezvivakwa zvinopesana nekuvimbika uye mutengo. Ivo vanonyora zvakajeka maitiro ebudiriro, bvunzo vachipokana ne data rechokwadi uye mafambiro ebasa, uye iterate zvichibva pane zvakacherechedzwa maitiro ekutadza kwete kuhwina-nguva imwe chete yebhenji. Apa ndipo apo kunzwisisa kwe theoretical kunoshanduka kuve kugona kwakasimba pane chigadzirwa, mutemo, uye mashandiro.
Zvisarudzo zvezvivakwa zvinotyaira kuita uye mutengo wekushandisa kwemakore. Panguva imwecheteyo, Kukwirisa imwe bhenji kunogona kuvanza yakafara system kushaya simba. Nzira yakatsiga ndeyekubatanidza kukurumidza kuyedza nekutonga: mhanyisa vatyairi vendege, tora humbowo, buritsa matanda esarudzo, uye urambe uchivandudza chengetedzo semaitiro emuenzaniso, zvinotarisirwa nemushandisi, uye zvinodikanwa zvekutonga.
Strategic Impact
Zvisarudzo zvezvivakwa zvinotyaira kuita uye mutengo wekushandisa kwemakore.
Zvisarudzo zvezvivakwa zvinotyaira kuita uye mutengo wekushandisa kwemakore. Mukutumirwa kwemhando yepamusoro, izvi zvinoshandurirwa kuita mitemo inoyerwa yekushanda, miganhu yevaridzi, uye tsika dzekudzokorora dzinodzokororwa kuitira kuti zvikwata zvikwire kuvimba pane kukwidza kusajeka.
Dzidzo yehunyanzvi inobatsira zvikwata kusarudza murwi wakakodzera, kwete iwo mutsva chete.
Dzidzo yehunyanzvi inobatsira zvikwata kusarudza murwi wakakodzera, kwete iwo mutsva chete. Mukutumirwa kwemhando yepamusoro, izvi zvinoshandurirwa kuita mitemo inoyerwa yekushanda, miganhu yevaridzi, uye tsika dzekudzokorora dzinodzokororwa kuitira kuti zvikwata zvikwire kuvimba pane kukwidza kusajeka.
Sarudzo dzeinjiniya dziri nani dzinoderedza zviitiko zvekuvimbika mukugadzira.
Sarudzo dzeinjiniya dziri nani dzinoderedza zviitiko zvekuvimbika mukugadzira. Mukutumirwa kwemhando yepamusoro, izvi zvinoshandurirwa kuita mitemo inoyerwa yekushanda, miganhu yevaridzi, uye tsika dzekudzokorora dzinodzokororwa kuitira kuti zvikwata zvikwire kuvimba pane kukwidza kusajeka.
Real-World Implementation
Kubatanidza zviuru zveGPUs muAI supercomputer saka gradient data inofamba pakati pemanodhi mumamicroseconds panguva yakagoverwa kudzidziswa.
Kurega imwe sevha iverenge ndangariro yemumwe zvakananga (RDMA) kuti ikurumidze kugoverwa mafaira masisitimu uye dhatabhesi pasina CPU pamusoro.
Kumhanyisa NCCL zvese-kuderedza mashandiro pamusoro peInfiniBand kuwiriranisa maremu emhando paboka reGPU.
Uchishandisa RoCE kuunza RDMA-maitiro yakaderera-latency kutamisa kune iripo Ethernet data-center network
Maitiro Ekuita
InfiniBand uye RDMA Networking mukuita
Kubatanidza zviuru zveGPU muAI supercomputer saka gradient data inofamba pakati penodhi mumamicroseconds panguva yakagoverwa kudzidziswa.
Kubatanidza zviuru zveGPUs muAI supercomputer saka gradient data inofamba pakati penodhi mumamicroseconds panguva yakagoverwa kudzidziswa Matimu anowanzo kuwana mhedzisiro iri nani kana achinge atsanangura emhando yepamusoro kumberi, chengetedza nzira yekukwira kwevanhu yemakesi emupendero, uye kuteedzera zvese zvakawanikwa zvechigadzirwa uye mutengo wekukanganisa nekufamba kwenguva.
InfiniBand uye RDMA Networking mukuita
Kurega imwe sevha iverenge ndangariro yemumwe zvakananga (RDMA) kuti ikurumidze kugoverwa mafaira masisitimu uye dhatabhesi pasina CPU pamusoro.
Kurega imwe sevha iverenge ndangariro yemumwe zvakananga (RDMA) kuti ikurumidze kugoverwa faira masisitimu uye dhatabhesi pasina CPU pamusoro Matimu anowanzo kuwana mhedzisiro iri nani kana achinge atsanangura emhando yepamusoro kumberi, chengetedza nzira yekukwira kwevanhu yemakesi emupendero, uye kuteedzera zvese kubudirira kwekubudirira uye kukanganisa mutengo nekufamba kwenguva.
InfiniBand uye RDMA Networking mukuita
Kumhanyisa NCCL zvese-kuderedza mashandiro pamusoro peInfiniBand kuwiriranisa maremu emhando pachikwata cheGPU.
Kumhanyisa NCCL zvese-kuderedza mashandiro pamusoro peInfiniBand kuwiriranisa maremu emuenzaniso mhiri kweGPU cluster Matimu anowanzo kuwana mhedzisiro iri nani kana achinge atsanangura emhando yepamusoro kumberi, chengetedza nzira yekukwira kwevanhu yemakesi emupendero, uye kuteedzera zvese zvakawanikwa zvechigadzirwa uye mutengo wekukanganisa nekufamba kwenguva.
InfiniBand uye RDMA Networking mukuita
Uchishandisa RoCE kuunza RDMA-maitiro yakaderera-latency kutamisa kune iripo Ethernet data-center network.
Uchishandisa RoCE kuunza RDMA-maitiro akaderera-latency kuchinjirwa kune iripo Ethernet data-center network Zvikwata zvinowanzowana zvirinani kana zvichitsanangudza zvikumbaridzo zvemhando yepamusoro, chengetedza nzira yekukwira kwevanhu yemakesi ekumucheto, uye kuteedzera zvese zvakawanikwa zvechigadzirwa uye mutengo wekukanganisa nekufamba kwenguva.
Njodzi & Guardrails
Kugadzirisa imwe bhenji kunogona kuvanza yakafara system kushaya simba.
Infrastructure uye mari yekugadzirisa inowanzotarisirwa pasi.
Chengetedzo uye kucherechedzwa mapundu anogona kukura sezvo masisitimu anowedzera kuoma.
Implementation Roadmap
Tsanangura latency, mhando, uye mutengo zvinangwa usati waitwa.
Tsanangura latency, mhando, uye mutengo zvinangwa usati waitwa. Bata nhanho yega yega segedhi rehumbowo: kana maitiro asina kusangana, imbomira kuburitsa, vhara gaka, uye wobva wawedzera kushandiswa.
Benchmark pasi pechokwadi mutoro uye data mamiriro.
Benchmark pasi pechokwadi mutoro uye data mamiriro. Bata nhanho yega yega segedhi rehumbowo: kana maitiro asina kusangana, imbomira kuburitsa, vhara gaka, uye wobva wawedzera kushandiswa.
Chishandiso chekutarisa zvikanganiso, kudonha, uye mushandisi maitiro.
Chishandiso chekutarisa zvikanganiso, kudonha, uye mushandisi maitiro. Bata nhanho yega yega segedhi rehumbowo: kana maitiro asina kusangana, imbomira kuburitsa, vhara gaka, uye wobva wawedzera kushandiswa.
Gadzirira nzira dzekudzosera kumashure uye dzezviitiko usati wawedzera.
Gadzirira nzira dzekudzosera kumashure uye dzezviitiko usati wawedzera. Bata nhanho yega yega segedhi rehumbowo: kana maitiro asina kusangana, imbomira kuburitsa, vhara gaka, uye wobva wawedzera kushandiswa.