Colloquium Details

Optimizing CPU Efficiency and Tail Latency in Datacenters

Speaker: Amy Ousterhout, UC Berkeley

Location: 60 Fifth Avenue 150

Date: March 28, 2022, 2 p.m.

Host: Jinyang Li


Optimizing CPU Efficiency and Tail Latency in Datacenters
Abstract: The slowing of Moore’s Law and increased concerns about the
environmental impacts of computing are exerting pressure on datacenter
operators to use resources such as CPUs and memory more efficiently.
However, it is difficult to improve efficiency without degrading the
performance of applications.
In this talk, I will focus on CPU efficiency and how we can increase
efficiency while maintaining low tail latency for applications. The key
innovation is to reallocate cores between applications on the same
server very quickly, every few microseconds. First I will describe
Shenango, a system design that makes such frequent core reallocations
possible. Then I will show how policy choices for core reallocation and
load balancing impact CPU efficiency and tail latency, and present the
policies that yield the best combination of both.
Bio: Amy is a postdoctoral researcher in the Department of Electrical
Engineering and Computer Sciences at UC Berkeley. She received her PhD
in Computer Science from MIT and her BSE in Computer Science from
Princeton University. Her research is on operating systems and
distributed systems, and focuses on improving the efficiency,
performance, and usability of applications in datacenters. She is a
recipient of a Jacobs Presidential Fellowship at MIT, an NSF Graduate
Research Fellowship, and a Hertz Foundation Fellowship.


In-person attendance only available to those with active NYU ID cards.

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