Stanford University

Kostis Kaffes


I am a PhD student in Electrical Engineering at Stanford University, advised by Christos Kozyrakis. I have also worked with David Mazieres and Adam Belay.

I am interested in computer systems, cloud computing, and scheduling. Recently, I have been working on end-host, rack-scale, and cluster-scale scheduling for μs-scale tail latency.

Previously, I completed my Diploma in Electrical and Computer Engineering in the National Technical University of Athens, Greece. There, I worked with Nectarios Koziris on interference-aware VM scheduling. I have also worked on data mobility at Arrikto and done internships at Google.


RackSched: A Microsecond-Scale Scheduler for Rack-Scale Computers.
Hang Zhu, Kostis Kaffes, Zixu Chen, Zhenming Liu, Christos Kozyrakis, Ion Stoica, Xin Jin.
OSDI 2020.

Leveraging Application Classes to Save Power in Highly-Utilized Data Centers .
Kostis Kaffes, Dragos Sbirlea, Yiyan Lin, David Lo, Christos Kozyrakis.
SoCC '20.

Centralized Core-granular Scheduling for Serverless Functions .
Kostis Kaffes, Neeraja J. Yadwadkar, Christos Kozyrakis.
SoCC '19.

Mind the Gap: A Case for Informed Request Scheduling at the NIC .
Jack Tigar Humphries, Kostis Kaffes, David Mazières, Christos Kozyrakis.
HotNets 2019.

Shinjuku: Preemptive Scheduling for μsecond-scale Tail Latency.
Kostis Kaffes, Timothy Chong, Jack Tigar Humphries, Adam Belay, David Mazières, Christos Kozyrakis.
NSDI 2019.