Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
#29 “I’m Not Dead Yet! The Role of the Operatin...
Search
cafenero_777
June 19, 2023
Technology
0
130
#29 “I’m Not Dead Yet! The Role of the Operating System in a Kernel-Bypass Era”
HotOS '19
https://dl.acm.org/doi/10.1145/3317550.3321422
cafenero_777
June 19, 2023
Tweet
Share
More Decks by cafenero_777
See All by cafenero_777
#51 “Empowering Azure Storage with RDMA”
cafenero_777
3
460
#49 “Gray Failure: The Achilles’ Heel of Cloud-Scale Systems”
cafenero_777
2
110
#50 “Scalable Hierarchical Aggregation Protocol (SHArP): A Hardware Architecture for Efficient Data Reduction”
cafenero_777
0
110
#33 “Destroying networks for fun (and profit)”
cafenero_777
0
91
#34 “MTPSA: Multi-Tenant Programmable Switches”
cafenero_777
0
54
#37 “Bluebird: High-performance SDN for Bare-metal Cloud Services”
cafenero_777
1
120
#39 “Profiling a warehouse-scale computer”
cafenero_777
0
40
#23 “VFP: A Virtual Switch Platform for Host SDN in the Public Cloud”
cafenero_777
0
220
#24 “Ananta: Cloud Scale Load Balancing”
cafenero_777
0
240
Other Decks in Technology
See All in Technology
クラウド開発環境Cloud Workstationsの紹介
yunosukey
0
200
2025-04-24 "Manga AI Understanding & Localization" Furukawa Arata (CyberAgent, Inc)
ornew
2
300
Road to Go Gem #rubykaigi
sue445
0
990
Winning at PHP in Production in 2025
beberlei
1
210
白金鉱業Meetup_Vol.18_生成AIはデータサイエンティストを代替するのか?
brainpadpr
3
190
技術者はかっこいいものだ!!~キルラキルから学んだエンジニアの生き方~
masakiokuda
2
280
Terraform Cloudで始めるおひとりさまOrganizationsのすゝめ
handy
2
200
3D生成AIのための画像生成
kosukeito
2
350
3月のAWSアップデートを5分間でざっくりと!
kubomasataka
0
130
PostgreSQL Log File Mastery: Optimizing Database Performance Through Advanced Log Analysis
shiviyer007
PRO
1
140
QA/SDETの現在と、これからの挑戦
imtnd
0
150
PicoRabbit: a Tiny Presentation Device Powered by Ruby
harukasan
PRO
2
270
Featured
See All Featured
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
680
Speed Design
sergeychernyshev
29
910
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.2k
Fontdeck: Realign not Redesign
paulrobertlloyd
84
5.5k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
The Pragmatic Product Professional
lauravandoore
33
6.6k
Fireside Chat
paigeccino
37
3.4k
Code Reviewing Like a Champion
maltzj
523
40k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
233
17k
4 Signs Your Business is Dying
shpigford
183
22k
Site-Speed That Sticks
csswizardry
6
500
The Language of Interfaces
destraynor
157
25k
Transcript
Research Paper Introduction #29 “I’m Not Dead Yet! The Role
of the Operating System in a Kernel-Bypass Era” ௨ࢉ#84 @cafenero_777 2021/10/14 1
Agenda • ରจ • ֓ཁͱಡ͏ͱͨ͠ཧ༝ 1. Introduction 2. Kernel-Bypass Accelerators
in the Datacenter 3. Evolving the Datacenter OS for Kernel Bypass 4. The Demikernel 5. Future Work 6. Related Work 7. CONCLUSION 2
ରจ • I’m Not Dead Yet! The Role of the
Operating System in a Kernel-Bypass Era • Irene Zhang, Jing Liu, Amanda Austin, Michael Lowell Roberts, Anirudh Badam • Microsoft Research, University of Wisconsin, University of Texas • HotOS '19 • https://dl.acm.org/doi/10.1145/3317550.3321422 3
֓ཁͱಡ͏ͱͨ͠ཧ༝ • ֓ཁ • DCNW༻్ͰͷOS”ऴᖼ (demise)”͍ͯ͠Δʁʂ • RDMA/DPDKߴ͕ͩநԽΛࡴ͢ • ৽͍͠I/OநԽ:
DemikernelͷఏҊ • ಡ͏ͱͨ͠ཧ༝ • NWߴԽͷͲͷํʁ • ۙະདྷͷ: library OS? • ΩϟονʔͳtitleͩͬͨͷͰ 4
1. Introduction 5 • աڈ10ͷαʔόI/OߴԽ V.S. CPUੑೳ • TCP-o ff
l oad, SmartNIC/SR-IOV, Comp./Enc./ML on FPGA • kernel bypassٕज़ͰI/OΦʔόʔϔουΛݮ • ػೳఏڙ͢Δ͕ɺநԽϨΠϠʔ͕ແ͍ • ʢྫɿsocket, fi le, pipeʣ • ࢄϝϞϦɾࢄετϨʔδ w/ RDMA • systemΛHWʹ߹ΘͤͯΧελϚΠζ -> େมʂ • OSΛͲ͏ม͑Δ͖͔ɻ৽OSΞʔΩςΫνϟDemikernelͰઃܭٞ͠
2. Kernel-Bypass Accelerators in the Datacenter 6 • Kernel Bypass
• KernelΦʔόʔϔουۃখͰ࠷ͷύέοτసૹΛࢦ͢ • I/Fػೳଘࡏ͠ͳ͍ • ϓϩάϥϚ͕OSಉͷػೳՃɾσόΠεຖʹػೳՃ • ྫɿ • DPDK: جຊతͳI/OσόΠεػೳΛنఆ • Arrakis: HWԾԽٕज़(SR-IOV)Ͱ࣮ • RDMA: verbs I/Frdmacm I/F (~socket)༷͋Δ͕ɾɾɾ • FPGA: ԿͰͰ͖Δ͕࣮༻ੑuse case࣍ୈɾɾɾ https://www.dpdk.org/wp-content/uploads/sites/35/2017/04/DPDK-India2017-RamiaJain-ArchitectureRoadmap.pdf
3. Evolving the Datacenter OS for Kernel Bypass 7 •
UserۭؒͰͷIʗOॲཧ࠷దԽ • طଘLibrary OSʹڞ༗ɾଟॏԽͷΈ͕͋Δʢ͕ॏ͍ʣ • ಁաతϝϞϦ֬อʢi.e. DDIO, NIC<->LLCʣ͕ແ͍ͷͰ࠶࣮ • ޮతͳநԽ • I/Oॲཧ͕͔ͬͨࠒͷઃܭʢͷ໊ʣV.S. ݱɿRedisreadͰ2us • நԽͱੑೳͷڱؒ • طଘPOSIX APIҡ࣋ߋʹΦʔόʔϔου͕͔͔Δ • طଘLibrary OSͱͷػೳͷҧ͍ • طଘɿkernel I/FσόΠεػೳ͕ۉҰͰ͋Δલఏ • ࠓճɿKernel-Bypass framework (HWͱͷSW/kernelͷ”ྑ͍ͱ͜औΓ”తͳʣΛೖΕ͍ͨ https://www.dpdk.org/wp-content/uploads/sites/35/2017/04/DPDK-India2017-RamiaJain-ArchitectureRoadmap.pdf
4. The Demikernel (1/3) 8 • Architecture: C/D pathͷ •
C: network/ fi le open, ͯ͘ྑ͍ -> طଘKernel • D: network/storage/memoryͷread/write -> LibOS + accelerator • I/O queueͱͯ͠நԽ • HWී௨queueΛར༻ -> ͜ΕΛͦͷ··நԽ • atomic data unitͱͯ͠ѻ͑Δʢ༨ͳͪൃੜ͠ͳ͍ʣ • σόΠεʹґଘ͠ͳ͍ߴϨϕϧநԽKernel-BypassϨΠϠʔ
4. The Demikernel (2/3) 9 • Syscall interface • C:
socket(): queue descriptorΛฦ͢ (not fi le descriptor) • C: packet typeͰ fi lter(): BPF frameworkΛఆ • C: merge(): I/OΩϡʔͷϚʔδ • C: sort(): ༏ઌʹԠͯ͡I/OΩϡʔΛ͏ • C: map(): P4తͳෳࡶͳpktॲཧ࣮Ͱ͖ͦ͏ • D: push/pop • ૢ࡞ൣғͷࢦఆ • non-blockingॲཧ. wait_*()Ͱfetch
4. The Demikernel (3/3) 10 • qtoken: Ұͭͷqૢ࡞ຖʹݻ༗ • epollΛվળͰ͖Δ
• wait_*()͕σʔλΛฦ͢->ଞͷsyscallݺͣʹʢۭৼΓʣࡁΉ • pop completion: pop͕ྃͨ͠Βthread͕ى͖Δɻbusy pollingཁΒͳ͍ • zero copy: • 1. ಁաతϝϞϦ֬อɿLibOS͕IOMMUϝϞϦొΛߦ͏ • 2. ΞϓϦέʔγϣϯͱI/OσόΠεؒͰͷڞ༗ϝϞϦͷௐΛͳΔ͘ݮΒ͢ • Free protect: ΞϓϦόοϑΝ։์໋ྩ -> LibOS͕I/Oऴྃ·Ͱ͔ͬͯΒ։์ • ʢैདྷಉ༷ʣॻ͖ࠐΈอޢແ͠ -> όοϑΝมߋʢwriteʣI/Oͭඞཁ͋Γ • DCར༻Ͱແ͠ɺͱ͍͏ओுɻྫɿRedisͰput requestຖʹόοϑΝׂޙɺσʔλߏମͰͦͷϙΠϯλʹࢦఆ
5. Future Work • OS Design • ಛఆΞΫηϥϨʔλͷෆػೳΛLibOSͰิʢDPDKͳΒNWελοΫશൠʣ • ΞΫηϥϨʔλͷछྨ͕ଟ͍߹શ෦LibOS͕ίʔυΛ࣋ͭʢʂʣLibOSͱɾɾɾʁ
• Network Protocols • I/OͷΑΓ൚༻తͳdata unitׂΛࢦ͢ɻ • طଘͷϑϨʔϜϫʔΫʢTCPHTTPSͳͲʣͳΒड৴ଆͰ࠶ߏͰ͖Δ͕ɺ൚༻ੑ੍͕ݶ͞Εͯ͠·͏ • File System and Storage • طଘFS (ext4ͳͲ)ΛLibOS (γϯάϧΞϓϦέʔγϣϯ)Ͱ͏ʹΦʔόʔϔου͕େ͖͗͢ • ΞΫηϥϨʔλʹదͨ͠FS? 11
6. Related Work • OS • Arraakis, IXΑΓநͷߴ͍I/F • ϢʔβϨϕϧͷOS֦ுͰHWӅṭ
-> NWελοΫͳͲͷOSػೳແ͍ • I/O Accelerated System • POSIX I/Fʹҡ࣋ͰඇޮԽɻྫɿmTCPͩͱDPDKΑΓlatency͔͔Δ • NW/TCPॲཧΛPMD/NICͰΔɺ੍͘͠ޚΛOS͔Β֎͢ํʢQUICͳͲʣ • I/O Accelerated Application • RDMAΛͬͨϦϞʔτϝϞϦͷϨΠςϯγʔΞϓϦέγϣʔϯ 12
7. Conclusion • I/Oੑೳେ෯্ʹ͍ͭͨ͘ΊʹKernel-bypass acceleratorsΛ͏ • Kernel-bypassͷͨΊOS/kernelͷػೳ͕͑ͳ͍ɺI/OநԽ͕ग़དྷͳ͍ • ্هͷΪϟοϓΛຒΊΒΕΔLibOSΛઃܭ͠ɺI/OநԽΛٞ 13
ࡾߦ·ͱΊ 14 • I/Oੑೳେ෯্ʹ͍ͭͨ͘ΊʹKernel-bypass acceleratorsΛ͏ • Kernel-bypassͷͨΊOS/kernelͷػೳ͕͑ͳ͍ɺI/OநԽ͕ग़དྷͳ͍ • ্هͷΪϟοϓΛຒΊΒΕΔLibOSΛઃܭ͠ɺI/OநԽΛٞ
EoP 15