Overview
Gradient checkpointing (inonziwo activation checkpointing) izano rekuchengetedza ndangariro iro rinorasa ma activation akawanda epakati panguva yekupfuura uye kuadzokorora panhunzi panguva yekudzokera shure. Iyo inokutendera kuti udzidzise zvakadzika, makuru network nekutengesa yakawedzera compute kune yakaderera ndangariro kushandiswa.
Gradient Checkpointing inyanzvi yekuvaka inobata mhando yemhando, mutengo wezvivakwa, latency, uye kuvimbika pachiyero.
Deep Dive
Kudzidzira neural network kunowanzo chengetedza masevhisi ega ega panguva yekupfuura nekuti backpropagation inoda ivo kuti vaverenge ma gradients. Kune mamodheru akadzika aya ma activation anotonga ndangariro. Gradient yekutarisa pachinzvimbo inochengetedza activation chete pane yakaganhurwa seti ye 'checkpoint' maseru uye inorasa zvimwe. Kana backprop ichisvika kudunhu rine activation yakadonhedzwa, inomhanyisa kumberi komputa yechikamu ichocho kuti igadzirise zvainoda, yobva yaenderera. Iine nzvimbo dzekutarisa dzakaiswa dzinenge dzese square-midzi-ye-N masikweya, ndangariro ye activation inodonha kubva kuodha N kuenda kuodha square-midzi-ye-N, nepo komputa inosimuka neinenge imwe chete yekuwedzera yekupfuura (inoda kusvika 20-30% inononoka). Izvi zvinoita kuti zvikwanise kukwana mabheji akakura saizi kana akadzama ma transformer pane imwecheteyo GPU.
Technical Insight
Iyo tekinoroji inoshandisa nguva-yakatarisana-yendangariro tradeoff. Kuchengeta zvese activation inokurumidza asi ndangariro-nzara; kuvadzokorora kwakachipa pamafambisirwo azvino uno zvine chekuita nemutengo wekupera mundangariro. Maframeworks akaita sePyTorch (torch.utils.checkpoint) inoputira module kuitira kuti inobuda mberi ichengetedzwe asi iyo yemukati inodzokororwa panguva yekumashure. Kusarudza nzvimbo yekutarisa nyaya: kunyange kuparadzaniswa kwezvinenge sqrt(N) zvikamu zvinoderedza ndangariro dzese uku uchingowedzera imwe chete yekuwedzera yekupfuura yekombuta yakazara.
Mastering Gradient Checkpointing
Gradient checkpointing (inonziwo activation checkpointing) izano rekuchengetedza ndangariro iro rinorasa ma activation akawanda epakati panguva yekupfuura uye kuadzokorora panhunzi panguva yekudzokera shure. Iyo inokutendera kuti udzidzise zvakadzika, makuru network nekutengesa yakawedzera compute kune yakaderera ndangariro kushandiswa. Gradient Checkpointing inyanzvi yekuvaka inobata mhando yemhando, mutengo wezvivakwa, latency, uye kuvimbika pachiyero. Kuti uvake kunzwisisa kwakadzama, bata Gradient Checkpointing semuenzaniso wekushandisa, kwete chinhu chimwe chete: tsanangura zvinodikanwa, kujekesa fungidziro, uye patsanura izvo zvinogona kuitwa nehurongwa hwakavimbika kubva kune zvichiri kuda kutonga kwenyanzvi.
Mukuita, zvikwata zvakasimba zvinoshandisa Gradient Checkpointing 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
Kudzidzisa yakadzika transformer ine hombe batch saizi paGPU imwe chete nekurasa uye kudzokorodza masendimita ekuita.
Kunyatso gadzirisa mamodheru pamifananidzo yakakwira-resolution uko mamepu ekuita angangofashukira GPU ndangariro.
Hugging Face Transformers inogonesa gradient_checkpointing=Ichokwadi kuti ikwane bhiriyoni-parameta modhi panguva yekugadzirisa zvakanaka.
Kubatanidza kutarisa neFSDP kuitira kuti ese maparamita uye ma activation achengetwe ari madiki, zvichigonesa kudzidziswa kwemhando dzemitauro mikuru.
Maitiro Ekuita
Gradient Checkpointing mukuita
Kudzidzisa yakadzika transformer ine hombe batch saizi paGPU imwe chete nekurasa uye kudzokorodza masendimita ekuita.
Kudzidzisa yakadzika transformer ine hombe batch saizi paGPU imwe chete nekurasa uye kudzokorodza masendimita maitimu 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.
Gradient Checkpointing mukuita
Kunyatso gadzirisa mamodheru pamifananidzo yakakwira-resolution uko mamepu ekuita angangofashukira GPU ndangariro.
Kunyatso-tuning mamodheru pamifananidzo yakakwira-resolution uko mepu dzekusimudzira dzaizofashukira GPU ndangariro Matimu anowanzo kuwana mhedzisiro iri nani kana achinge atsanangura emhando yepamusoro kumberi, chengetedza nzira yekukwira kwevanhu yemakesi ekumucheto, uye kuteedzera zvese zvakawanikwa zvechigadzirwa uye mutengo wekukanganisa nekufamba kwenguva.
Gradient Checkpointing mukuita
Hugging Face Transformers inogonesa gradient_checkpointing=Ichokwadi kuti ikwane bhiriyoni-parameta modhi panguva yekugadzirisa zvakanaka.
Hugging Face Transformers inogonesa gradient_checkpointing=Chokwadi kukwana mabhirioni-parameta modhi panguva yekumisikidza Matimu anowanzo kuwana mibairo iri nani kana achinge atsanangura hunhu hwepamberi, chengetedza nzira yekukwira kwevanhu yemakesi emupendero, uye kuteedzera zvese zvakawanikwa zvechigadzirwa uye mutengo wekukanganisa nekufamba kwenguva.
Gradient Checkpointing mukuita
Kubatanidza kutarisa neFSDP kuitira kuti ese maparamita uye ma activation achengetwe ari madiki, zvichigonesa kudzidziswa kwemhando dzemitauro mikuru.
Kubatanidza kutarisa neFSDP kuitira kuti ese maparamita uye ma activation achengetwe ari madiki, zvichiita kuti kudzidziswa kwemhando dzemitauro mikuru Matimu anowanzo kuwana mibairo iri nani kana achinge atsanangura zvikumbaridzo zvemhando yepamusoro kumberi, 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.