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System Research in MSRA

System Research in MSRA. Bingsheng He. Overview. Research works within SRG Debugging tools Many-core operating system Personal research interests Architecture aware systems Cooperation opportunities. Goal. Debugging is challenging

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System Research in MSRA

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  1. System Research in MSRA Bingsheng He

  2. Overview • Research works within SRG • Debugging tools • Many-core operating system • Personal research interests • Architecture aware systems • Cooperation opportunities

  3. Goal • Debugging is challenging • Complex software: multi-threaded, distributed systems, legacy modules • Complex environment: hardware failures, network partition, disk error… • Goal: make it easy to debug complex, distributed systems • Correctness bugs • Performance bugs

  4. Our approaches • Static analysis: enforce coding discipline • HangWiz (EuroSys’08): soft-hang detection • RegionWiz (PLDI’08): memory-region safety verification • Runtime analysis • D3S (NSDI’08): distributed predicate checking • R2 (OSDI’08): deterministic replay to make bugs reproducible

  5. Multi-core: the trend • Chips with 2 or 4 cores are common • Chips with 10~100 cores will appear within 5 years. [A. Agarwal 2007] Corollary of Moore’s Law

  6. Problems in Existing OSes • Share data structures protected by locks • Scheduling queues. [Gough et al. 2007] • Directory lookups. [Veal and Foong 2007] • Codebases are too large and complex • Modifications are resource-intensive undertaking • Corey: the first research prototype of redrawing the multi-core OS architecture

  7. Corey Design • Fundamental principle • Let applications/LibOS control sharing • Lock/share carefully /rarely • Use cores creatively Mapreduce App Web Server App Mapreduce libOS Web Server libOS U K Corey Hardware Many-core C1 C2 C0 C3 Interconnect

  8. Architecture Aware Systems • Processor aware systems • Cache conscious automata [ICDE’05, TKDE’06] • GPGPU [SIGMOD’07, SIGMOD’08] • Disk aware systems • Flash-aware B+-tree [ICDE’09] • Power aware systems

  9. Cooperation Opportunities • Co-application for project funds from MSRA • Funding promising research projects interested by the University and MSRA • Targeting at top-rank publications (usually) • Internship/Visiting scholar • Exposing the students/faculties with the state-of-the-art research • Building a close relationship between MSRA and universities

  10. Who we are • Managers • Zheng Zhang • Lidong Zhou • Staff • Zhenyu GUO, Yang MAO, Wei LIN, Xuezheng LIU, Ming WU, Haoxiang LIN, Bing Su, Bingsheng He • Interns (MIT, UCSD…)

  11. Our extended family • Close collaborators in China • HUST (P2P VoD, Storage) • Fudan (manycore) • Tsinghua (HPC) • SJTU (Model checking/verification) • BJU (P2P) • … Lintao ZHANG (MSR-SVC) Frans Kaashoek (MIT) Geoff Voelker (USCD) Junfeng YANG (MSR-SVC/Columbia Univ)

  12. Q&A • Thanks.

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