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SUMMARY:The Demikernel Datapath Architecture for Microsecond-scale Datacen
 ter Systems - Irene Zhang\, Principal Researcher\, Microsoft Research
DTSTART:20250127T140000Z
DTEND:20250127T150000Z
UID:TALK227413@talks.cam.ac.uk
CONTACT:Richard Mortier
DESCRIPTION:Datacenter systems and I/O devices now run at single-digit mic
 rosecond latencies\, requiring nanosecond-scale operating systems. Traditi
 onal kernel-based operating systems impose an unaffordable overhead\, so r
 ecent kernel-bypass OSes (e.g.\, Arrakis\, Ix) and libraries (e.g.\, Calad
 an\, eRPC) eliminate the OS kernel from the I/O datapath. However\, these 
 systems do not offer a general-purpose datapath OS replacement that meet t
 he needs of microsecond-scale systems. As a result\, while kernel-bypass h
 ardware is widely available in the datacenter\, it is not widely used.\n\n
 This talk summarizes Demikernel\, a flexible datapath OS and architecture 
 designed for heterogenous kernel-bypass devices and microsecond-scale data
 center systems. Demikernel supports a variety of kernel-bypass hardware\, 
 including DPDK\, RDMA\, as well as software bypass solutions like io_uring
 . To support microsecond-scale operation\, Demikernel includes a new nanos
 econd-scale TCP stack\, written in Rust and proposes new memory management
 \, CPU scheduling and network abstractions. Demikernel is currently used b
 y Bing and will go into production with Azure services later this year.\n\
 nBio: Irene Zhang is a Principal Researcher at Microsoft Research. Her wor
 k focuses on datacenter operating systems and distributed systems\, especi
 ally making new datacenter hardware technologies more widely usable by hig
 hly-demanding datacenter applications. Irene completed her PhD in 2017 at 
 the University of Washington\, where her PhD thesis focused on distributed
  systems that span mobile devices and cloud servers. Her thesis work recei
 ved the ACM SIGOPS Dennis Ritchie doctoral dissertation award and the UW A
 llen School William Chan Memorial dissertation award. Before her PhD\, Ire
 ne was a member of the virtual machine monitor group at VMware\, where she
  worked on memory resource management and virtual machine checkpointing.\n
 \n"teams link":https://teams.microsoft.com/l/meetup-join/19:meeting_MzQwYm
 RhZWMtZWNiZC00YzViLWI2M2YtYmFkNTQyZDYwNDNm@thread.v2/0?context=%7B%22Tid%2
 2:%2249a50445-bdfa-4b79-ade3-547b4f3986e9%22\,%22Oid%22:%22f9db8549-c114-4
 63c-b14c-fad83c2ac17b%22%7D
LOCATION:Computer Lab\, FW11
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