About Me
I am a Computer Science Ph.D. candidate at Johns Hopkins University. I am fortunate to be advised by Dr. Soudeh Ghorbani. My research interests span around designing operating systems and host networking componenets for datacenter applications. I'm currently investigating the sources and implications of data center traffic burstiness.
Education
- 2019-Present
- Computer Science Ph.D., Johns Hopkins University
- 2019-2021
- Computer Science M.S.Eng., Johns Hopkins University
- 2016-2018
- Computer Software Engineering MSc., Iran University of Science and Technology
- 2012-2016
- Computer Software Engineering BSc., Iran University of Science and Technology
Current Research
- Microbursts are one of the hidden culprits behind data center network performance degradation . We are investigating ways to identify, measure and mitigate them.
- Process scheduling is an old yet unsolved problem for data center hosts. With the emergence of kernel-bypass runtimes, new schemes are necessary to allow more efficient resource utilization while preserving the performance of latency-sensitive applications. We are currently investigting how micro-quanta scheduler tries to bring balance between fairness and responsiveness.
- Power management is another area of interest for data center operators. We recently proposed in-application process scheduling for latency-critical datacenter applications to leverage application knowledge for core management and ultimately smarter CPU power saving.
Publications
-
Practical Packet Deflection in Datacenters
Sepehr Abdous, Erfan Sharafzadeh, Soudeh Ghorbani. 2023. Practical Packet Deflection in Datacenters. In CoNEXT '23 (ACM Netw. vol 1)
slides artifacts -
Understanding the impact of host networking elements on traffic bursts
Erfan Sharafzadeh,Sepehr Abdous, Soudeh Ghorbani. 2023. Understanding the impact of host networking elements on traffic bursts. In NSDI '23.
webpage slides artifacts -
Understanding Microquanta Process Scheduling for Cloud Applications
Erfan Sharafzadeh, Alireza Sanaee, Peng Huang, Gianni Antichi, Soudeh Ghorbani. 2022. Understanding Microquanta Process Scheduling for Cloud Applications. In ACM/IEEE CloudAM '22.
slides artifacts -
Poster: A high-resolution study of data center traffic at its origin
Erfan Sharafzadeh, Soudeh Ghorbani. 2021. Poster: A high-resolution study of data center traffic at its origin. In CoNEXT '21
-
Burst-tolerant datacenter networks with Vertigo
Sepehr Abdous*, Erfan Sharafzadeh*, and Soudeh Ghorbani. 2021. Burst-tolerant datacenter networks with Vertigo. In CoNEXT '21, *co-first authors
slides artifacts -
Peafowl: In-application CPU Scheduling to Reduce Power Consumption of In-memory Key-Value Stores
Esmail Asyabi, Azer Bestavros, Erfan Sharafzadeh, Timothy Zhu. 2020. Peafowl: In-application CPU Scheduling to Reduce Power Consumption of In-memory Key-Value Stores. In SoCC '20
-
Yawn: A CPU Idle-state Governor for Datacenter Applications
Erfan Sharafzadeh, Seyed Alireza Sanaee Kohroudi, Esmail Asyabi, and Mohsen Sharifi. 2019. Yawn: A CPU Idle-state Governor for Datacenter Applications. In APSys '19
-
CTS: An Operating System CPU Scheduler to Mitigate Tail Latency for Latency-Sensitive Multi-Threaded Applications
Esmail Asyabi, Erfan Sharafzadeh, SeyedAlireza SanaeeKohroudi, Mohsen Sharifi, CTS: An operating system CPU scheduler to mitigate tail latency for latency-sensitive multi-threaded applications, JPDC 2019
Professional and Work Experience
- Research Associate Intern, Hewlett Packard Labs, Hewlett Packard Enterprise, Summer 2023 - Present.
- Artifact evaluation committee member, 2023 ACM Symposium on Operating Systems Principles (SOSP 2023)
- Shadow PC member, 2022 ACM European Conference on Computer Systems (EuroSys 2022).
- Shadow PC member, 2021 ACM European Conference on Computer Systems (EuroSys 2021).
- Design and development of "Shariffood", Sharif University of Technology dorms meal reservation portal.
- Infrastructure lead of IUST Cloud Computing Center: Iran University of Science and Technology IAAS Cloud platform.
Teaching Assistance
- Fall 2016, Advanced Programming, IUST.
- Fall 2017, Operating Systems, IUST
- Spring 2018, Cloud Computing Environments, IUST
- Fall 2018, Operating Systems, IUST
- Spring 2020, Cloud Computing, JHU, course page
- Fall 2022, Computer Networks, JHU, course page
News
- Nov 14, 2023
Our paper "Practical packet deflection for datacenters" is accepted at CoNEXT '23. Can't wait to present our findings in Paris!
- Apr 28, 2023
I'll be joining the NDSL group at Hewlett Packard Labs as a Research Intern this summer!
- Apr 16, 2023
I'll be presenting our paper, Valinor, at the NSDI '23 conference in the congestion control track. Grateful to Usenix for the travel award!
- Dec 15, 2022
Our paper Valinor got accepted to NSDI '23. I'm thrilled to present how network traffic bursts manifist themselves at different scales!
- Dec 5, 2022
I had the privilege to present our work on Microquanta process scheduler at IEEE/ACM CloudAM 2022 workshop, part of the UCC '22 conference. Grateful for NSF's travel award!
- Dec 7, 2021
I presented our paper "Vertigo" in the virtual CoNEXT '21 conference. Vertigo proposes selective deflection routing to overcome the impact of microbursts on packet loss and flow performance.
Misc
When I'm away from my PC, I play soccer (goalkeeper indoors, full back outdoors!), play video games (Fable and Far cry fan!), or leaf through my favorite books (I'm a Tolkien fan). Let's chat if our interests align ;)
Contact
You can contact me through my academic email or my personal email.