Sequence Parallelism uye Ring Attention
Sequence parallelism inopatsanura imwechete yakareba yekuisa kutevedzana kune akawanda maGPU pamwe nechiratidzo (nguva) dimension, uye Ring Attention inobvumira iwo maGPU kuverengera kunyatsotarisisa nekupfuura kiyi / kukosha mabhuroko kutenderedza mhete.
Pfupiso
Together they make million-token context windows feasible without any single GPU holding the whole sequence.
Kudzika Kwakadzika
Kutarisisa kwakajairwa kunoda muvhunzo wega wega kuti uone kiyi yega yega / kukosha, saka iyo activation memory inokura nehurefu hwekutevedzana uye iyo K/V izere inofanirwa kuwanikwa. Sequence parallelism inoshatisa kutevedzana kuitira kuti GPU yega yega ive ine contiguous chunk yematokens (nemibvunzo yavo, makiyi, kukosha). Ring Attention yobva yaronga maGPU mumhete ine musoro: mudziyo wega wega unochengeta mivhunzo yemunharaunda yakagadziriswa nepo K/V zvidhinha zvichipfuudzwa hop-by-hop kutenderedza mhete. Sezvo chivharo chega chega chinosvika, iyo GPU inoverengera kutarisisa uye inounganidza mibairo uchishandisa online-softmax (iyo yakafanana inomhanya max/sum trick seFlashAttention). Mushure mekuzara kwakazara, kubvunza kwese kwakanangana nemakiyi ese chaizvo, pasina GPU yakambochengeta K/V yese. Zvine hutsinye, iyo K/V kutaurirana inopindirana nekombuta, saka inowedzera mudiki-wachi mutengo.
Technical Insight
Mhete Attention inotsamira pa online softmax: kutarisisa kunogona kuverengerwa block-by-block uku uchichengeta inomhanya uye inomhanya normalizer, wozodzoreredza mari dzepakutanga kana kukosha kwakakura kuchioneka. Izvi zvinoita kuti mhedzisiro yemasvomhu ifanane nekutarisa kuzere. Mhete inopfuura chete K/V tensor (saizi zvikero nebhuroko, kwete kutevedzana kwakazara), uye nekuti kutaurirana kwega kwega hop kunopindirana neiyo yapfuura block's matmul, bandwidth - kwete ndangariro - inova iyo inomisa chinhu.
Strategic Impact
Mutengo uye bhajeti
Zvisarudzo zvezvivakwa zvinotyaira kuita uye mutengo wekushandisa kwemakore.
Sarudzo dzakajeka
Dzidzo yehunyanzvi inobatsira zvikwata kusarudza murwi wakakodzera, kwete iwo mutsva chete.
Kudzora kwemhando yepamusoro
Sarudzo dzeinjiniya dziri nani dzinoderedza zviitiko zvekuvimbika mukugadzira.
Ramangwana Rekutevedzana Parallelism uye Ring Kutarisa
Sequence parallelism iri kuita mwero pakudzidziswa kwenguva refu uye inference, kazhinji inosanganiswa ne tensor uye pombi parallelism kuita '4D' kana '5D' parallel marongero. Variants vakaita semitsetse kana zigzag kutarisisa kudzoreredza basa rinokonzerwa necausal masking. Tarisira topology-inoziva mhete pamusoro peNVLink uye yakasimba kubatanidzwa neKV-cache kuburitsa, kusunda hurefu hwemamiriro ezvinhu kusvika kumakumi emamiriyoni ematokeni ekudzosa, macodebases, uye magwaro marefu.
Real-World Implementation
Kudzidzira 1M-chiratidzo chinyorwa LLM nekugovanisa kutevedzana kwega kwega kuyambuka 8 GPUs neRing Attention.
Megatron-LM's sequence parallelism inoderedza activation ndangariro muLayerNorm uye kudonha matunhu.
Kugadzira bhuku rose kana hombe kodhi repository mune imwe yekupfuura pass pasina kuderedzwa
Kubatanidza Kutarisa kweRing uye tensor parallelism kuti ikwane yekupedzisira-yakareba-mamiriro ekutaura pane akawanda-GPU node.
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.
Benchmark pasi pechokwadi mutoro uye data mamiriro.
Chishandiso chekutarisa zvikanganiso, kudonha, uye mushandisi maitiro.
Gadzirira nzira dzekudzosera kumashure uye dzezviitiko usati wawedzera.
Ramba Uchiongorora
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Gaidhi rinotevera
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Mibvunzo inowanzo bvunzwa
What is Sequence Parallelism and Ring Attention?
Sequence parallelism inopatsanura imwechete yakareba yekuisa kutevedzana kune akawanda maGPU pamwe nechiratidzo (nguva) dimension, uye Ring Attention inobvumira iwo maGPU kuverengera kunyatsotarisisa nekupfuura kiyi / kukosha mabhuroko kutenderedza mhete. Pamwe chete vanogadzira miriyoni-chiratidzo mamiriro windows zvinogoneka pasina chero GPU imwe chete inobata iyo yese kutevedzana.
Ndeapi dimension iyo kutevedzana kufanana kunopatsanura iyo data?
Sequence parallelism shards inoteedzana kuyambuka maGPU pamwe nechiratidzo/nguva axis, saka mudziyo wega wega une chunk inosanganisirwa yematokens.
Chii chinonzi Ring Attention inopfuura pakati peGPUs dzakarongwa mumhete?
Imwe neimwe GPU inochengeta mibvunzo yayo yemunharaunda yakagadziriswa uye inopfuudza kiyi / kukosha inovhara hop-ne-hop yakatenderedza mhete kuitira kuti mubvunzo wega wega unozoona kiyi yega yega.
Ndeipi nzira inoita kuti kutariswa kuverengerwe block-by-block uye ichiri kuenderana nekutarisa kuzere chaizvo?
Online softmax inoteedzera inomhanya uye summary, ichidzoreredza chikamu mhedzisiro sezvinodiwa, ichiita iyo block-huchenjeri computation inofanana nekutarisa kuzere.
Nei Ring Attention isingade chero GPU imwe chete kuchengetedza iyo yakazara K/V?
Nekuti K/V zvidhinha zvinosvika zvichikwira uye yega yega GPU inounganidza kutarisisa, hapana mudziyo unomboda kiyi yese / kukosha kwakaiswa mundangariro kamwechete.
Ring Attention inochengeta sei kutaurirana kubva kutonga nguva yekumhanya?
Yega yega hop's K / V kutaurirana inoputirana nekuwandisa kwematrix kweiyo block block, saka nguva yekufambisa inovanzwa kuseri kwekombuta.