vAttention: Dynamic Memory Management for Serving LLMs without PagedAttention
Ramya Prabhu, Ajay Nayak, Jayashree Mohan, Ramachandran Ramjee, Ashish Panwar
May 2024
Ramachandran Ramjee
Partner Research Manager
Publications
Publications by Year
-
Taming Throughout-Latency Tradeoff in LLM Inference with Sarathi-Serve
Amey Agrawal, Nitin Kedia, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Alexey Tumanov, Ramachandran Ramjee
OSDI 2024 | May 2024
VIDUR: A Large-Scale Simulation Framework for LLM Inference
Amey Agrawal, Nitin Kedia, Jayashree Mohan, Ashish Panwar, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee, Alexey Tumanov
The Seventh Annual Conference on Machine Learning and Systems | May 2024
Just-In-Time Checkpointing: Low Cost Error Recovery from Deep Learning Training Failures
Tanmaey Gupta, Sanjeev Krishnan, Rituraj Kumar, Abhishek Vijeev, Bhargav Gulavani, Nipun Kwatra, Ramachandran Ramjee, Muthian Sivathanu
2024 European Conference on Computer Systems | April 2024
Enhancing Tail Performance in Extreme Classifiers by Label Variance Reduction
Anirudh Buvanesh, Rahul Chand, Jatin Prakash, Bhawna Paliwal, Mudit Dhawan, Neelabh Madan, Deepesh Hada, Vidit Jain, Sonu Mehta, Yashoteja Prabhu, Manish Gupta, Ramachandran Ramjee, Manik Varma (manik)
ICLR 2024 | April 2024
-
SARATHI: Efficient LLM Inference by Piggybacking Decodes with Chunked Prefills
Amey Agrawal, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee
September 2023
Renee: End-to-end training of extreme classification models
Vidit Jain, Jatin Prakash, Deepak Saini, Jian Jiao, Ramachandran Ramjee, Manik Varma
In Proceedings of the Conference on Machine Learning and Systems, Miami, Florida | June 2023
-
Varuna: Scalable, Low-cost Training of Massive Deep Learning Models
Sanjith Athlur, Nitika Saran, Muthian Sivathanu, Ramachandran Ramjee, Nipun Kwatra
EuroSys 2022 | April 2022
Best Paper Award
Singularity: Planet-Scale, Preemptive and Elastic Scheduling of AI Workloads
Dharma Shukla, Muthian Sivathanu, Srinidhi Viswanatha, Bhargav Gulavani, Rimma Nehme, Amey Agrawal, Chen Chen, Nipun Kwatra, Ramachandran Ramjee, Pankaj Sharma, Atul Katiyar, Vipul Modi, Vaibhav Sharma, Abhishek Singh, Shreshth Singhal, Kaustubh Welankar, Lu Xun, Ravi Anupindi, Karthik Elangovan, Hasibur Rehman, Zhou Lin, Rahul Seetharaman, Cheng Xu, Eddie Ailijiang, Suresh Krishnappa, Mark Russinovich
February 2022
-
Unsupervised Clustering using Pseudo-semi-supervised Learning
Divam Gupta, Ramachandran Ramjee, Nipun Kwatra, Muthian Sivathanu
Eighth International Conference on Learning Representations (ICLR) | April 2020
Balancing efficiency and fairness in heterogeneous GPU clusters for deep learning
Shubham Chaudhary, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Srinidhi Viswanatha
Fifteenth European Conference on Computer Systems (EuroSys'20) | April 2020
-
Gandiva: Introspective Cluster Scheduling for Deep Learning
Wencong Xiao, Romil Bhardwaj, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Zhenhua Han, Pratyush Patel, Xuan Peng, Hanyu Zhao, Quanlu Zhang, Fan Yang, Lidong Zhou
13th USENIX Symposium on Operating Systems Design and Implementation (OSDI 2018) | October 2018
Privado: Practical and Secure DNN Inference with Enclaves
Karan Grover, Shruti Tople, Shweta Shinde, Ranjita Bhagwan, Ramachandran Ramjee
September 2018
Scalable measurement of air pollution using COTS IoT devices
Varun Jain, Mansi Goel, Mukulika Maity, Vinayak Naik, Ramachandran Ramjee
WACI Workshop at 10th International Conference on Communication Systems & Networks (COMSNETS) | January 2018
WACI Master Award Winner
-
AutoCalib: Automatic Traffic Camera Calibration at Scale
Romil Bhardwaj, Gopi Krishna Tummala, G. Ramalingam, Ramachandran Ramjee, Prasun Sinha
ACM BuildSys 2017 | November 2017
[Best Paper Award Winner and Best Demo Award Winner]
Skip-Correlation for Multi-Power Wireless Carrier Sensing
Romil Bhardwaj, Krishna Chintalapudi, Ramachandran Ramjee
USENIX NSDI | March 2017
Blood Count on a Smartphone Microscope: Challenges
Uma P. Moravapalle, Amit Deshpande, Ashish Kapoor, Ramachandran Ramjee, Priya Ravi
HotMobile | February 2017
-
Big Data Analytics over Encrypted Datasets with Seabed
Antonis Papadimitriou, Ranjita Bhagwan, Nishanth Chandran, Ramachandran Ramjee, Andreas Haeberlen, Harmeet Singh , Abhishek Modi, Saikrishna Badrinarayanan
2016 USENIX OSDI | November 2016
IQ-Hopping: Distributed Oblivious Channel Selection for Wireless Networks
Apurv Bhartia, Deeparnab Chakrabarty, Krishna Chintalapudi, Lili Qiu, Bozidar Radunovic, Ramachandran Ramjee
MobiHoc '16 Proceedings of the 17th ACM International Symposium on Mobile Ad Hoc Networking and Computing, Paderborn, Germany | July 2016
ISBN: 978-1-4503-4184-4
A Critique of FCC’S TV White Space Regulations
Krishna Chintalapudi, Ramachandran Ramjee
GetMobile | January 2016, Vol 20: pp. 20-25
-
Insider: Towards Breaking Down Mobile App Silos
Vageesh Chandramouli, Abhijnan Chakraborty, Vishnu Navda, Saikat Guha, Venkat Padmanabhan, Ramachandran Ramjee, ,
TRIOS Workshop held in conjunction with the SIGOPS SOSP 2015 | September 2015
-
WiFi-XL: Extending WiFi to Wide Areas in White Spaces
Apurv Bhartia, Mahanth Gowda, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee, Deeparnab Chakrabarty, Lili Qiu, Romit Roy Chowdhury
MSR-TR-2014-132 | September 2014
Adtributor: Revenue Debugging in Advertising Systems
Ranjita Bhagwan, Rahul Kumar, Ramachandran Ramjee, George Varghese, Surjyakanta Mohapatra, Hemanth Manoharan, Piyush Shah
Symposium on Networked Systems Design and Implemenentation (NSDI) | April 2014
-
Coordinating Cellular Background Transfers using LoadSense
Venkat Padmanabhan, Ramachandran Ramjee, , Vishnu Navda
ACM Mobicom 2013 | September 2013
ACM Mobicom 2013
EnVi: Energy Efï¬cient Video Player for Mobiles
Sahil Suneja, Vishnu Navda, Ramachandran Ramjee, Eyal de Lara
CellNet 2013 workshop | June 2013
MiG: Efficient Migration of Desktop VMs using Semantic Compression
Anshul Rai, Ramachandran Ramjee, Ashok Anand, Venkat Padmanabhan, George Varghese
USENIX Annual Technical Conference | June 2013
USENIX Annual Technical Conference
-
RadioJockey: Mining Program Execution to Optimize Cellular Radio Usage
Pavan Kumar Athivarapu, Ranjita Bhagwan, Saikat Guha, Vishnu Navda, Ramachandran Ramjee, Dushyant Arora, Venkat Padmanabhan, George Varghese
In Proceedings of the 18th Annual International Conference on Mobile Computing and Networking (MobiCom) | August 2012
WiFi-NC : WiFi Over Narrow Channels
Krishna Chintalapudi, Bozidar Radunovic, Vlad Balan, Michael Buettener, Vishnu Navda, Ramachandran Ramjee, Srinivas Yerramalli
MSR-TR-2012-17 | April 2012
UC Berkeley Tech Report
-
WiFi-Nano : Reclaiming WiFi Efficiency through 800 ns slots
Eugenio Magsiretti, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee
Mobicom | September 2011
(selected among top 5 contenders for best paper award)
SpecNet: Spectrum Sensing Sans Frontières
Anand Padmanabha Iyer, Krishna Chintalapudi, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan, Chandra R. Murthy
8th USENIX Symposium on Networked Systems Design and Implementation (NSDI) | March 2011
-
Bartendr: A Practical Approach to Energy-aware Cellular Data Scheduling
Aaron Schulman, Vishnu Navda, Ramachandran Ramjee, Neil Spring, Pralhad Deshpande, Calvin Grunewald, Venkat Padmanabhan, Kamal Jain
Mobicom | September 2010
LiteGreen: Saving Energy in Networked Desktops Using Virtualization
Tathagata Das, Pradeep Padala, Venkat Padmanabhan, Ramachandran Ramjee, Kang G. Shin
USENIX Annual Technical Conference [BEST PAPER] | June 2010
USENIX Annual Technical Conference [BEST PAPER]
Best Paper
NAPman: Network-Assisted Power Management for WiFi Devices
Eric Rozner, Vishnu Navda, Ramachandran Ramjee, Shravan Rayanchu
MobiSys | June 2010
MobiSys
PRISM: Platform for Remote Sensing using Mobile Smartphones
Tathagata Das, Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee, Asankhaya Sharma
International Conference on Mobile Systems, Applications and Services (Mobisys) | June 2010
International Conference on Mobile Systems, Applications and Services (Mobisys)
EndRE: An End-System Redundancy Elimination Service for Enterprises
Bhavish Aggarwal, Aditya Akella, Ashok Anand, Athula Balachandran, Pushkar V. Chitnis, Chitra Muthukrishnan, Ramachandran Ramjee, George Varghese
Symposium on Networked Systems Design and Implementation (NSDI) | April 2010
Analytical Models for Energy Consumption in Infrastructure WLAN STAs Carrying TCP Traffic
P. Agrawal, A. Kumar, J. Kuri, M. K. Panda, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan
International Conference on Communication Systems and Networks (COMSNETS), Best Paper Award | January 2010
-
Cool-Tether: Energy Efficient On-the-fly WiFi Hot-spots using Mobile Phones
Vishnu Navda, Ramachandran Ramjee, Elizabeth Belding, Venkat Padmanabhan
International Conference on emerging Networking EXperiments and Technologies (CoNEXT) | December 2009
DirCast: A Practical and Efficient Wi-Fi Multicast System
Ranveer Chandra, Sandeep Karanth, Thomas Moscibroda, Vishnu Navda, Jitu Padhye, Ramachandran Ramjee, Lenin Ravindrananth
ICNP 2009: 17th IEEE International Conference on Network Protocols, Princeton, New Jersey | October 2009
Redundancy in Network Traffic: Findings and Implications
Ashok Anand, Chitra Muthukrishnan, Aditya Akella, Ramachandran Ramjee
Proceedings of ACM SIGMETRICS/Performance | June 2009
muNet: Harnessing Multiuser Capacity in Wireless Mesh Networks
Li Erran Li, Richard Alimi, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
Proceedings of IEEE Infocom Mini Symposium | April 2009
We present muNet, a wireless mesh network design and implementation to harness the multiuser capacity of wireless channels. Traditionally, media access control is designed to schedule one transmission between one sender and one receiver without interference at any given time. However, this design is suboptimal in terms of achieving the multiuser capacity of multi-access wireless channels. In muNet, we implement effective physical layer techniques called superposition coding and successive interference cancellation to enable simultaneous unicast transmissions from a single transmitter to multiple receivers as well as from multiple transmitters to a single receiver. We design the first practical MAC protocol that leverages such a physical layer and exposes the multiuser capacity to upper layers. We also present a simple, effective routing protocol that increases simultaneous transmission opportunities for the MAC layer. A proof-of-concept muNet is implemented on the GNU Radio platform. Measurements on the implementation shows that the throughput gains of muNet are significant (up to 93%).
-
Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee
ACM Sensys | November 2008
ACM Sensys
Raleigh, NC, USA
iPack: in-Network Packet Mixing for High Throughput Wireless Mesh Networks
Richard Alimi, Li Erran Li, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
IEEE Infocom | April 2008
TrafficSense: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkata N. Padmanabhan, Ramachandran Ramjee, Venkat Padmanabhan
MSR-TR-2008-59 | April 2008
-
Superposition Coding for Wireless Mesh Networks
Li (Erran) Li, Richard Alimi, Ramachandran Ramjee, Jingpu Shi, Yanjun Sun, Harish Viswanathan, Yang Richard Yang
Extended Abstract (4 pages) in ACM Mobicom | September 2007
Network Coding-Based Broadcast in Mobile Ad hoc Networks
Li Erran Li, Ramachandran Ramjee, Milind Buddhikot, Scott Miller
IEEE Infocom, Anchorage, AK, USA | May 2007
IEEE Infocom, Anchorage, AK, USA
Publications by Research Area
-
vAttention: Dynamic Memory Management for Serving LLMs without PagedAttention
Ramya Prabhu, Ajay Nayak, Jayashree Mohan, Ramachandran Ramjee, Ashish Panwar
May 2024
Taming Throughout-Latency Tradeoff in LLM Inference with Sarathi-Serve
Amey Agrawal, Nitin Kedia, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Alexey Tumanov, Ramachandran Ramjee
OSDI 2024 | May 2024
VIDUR: A Large-Scale Simulation Framework for LLM Inference
Amey Agrawal, Nitin Kedia, Jayashree Mohan, Ashish Panwar, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee, Alexey Tumanov
The Seventh Annual Conference on Machine Learning and Systems | May 2024
Just-In-Time Checkpointing: Low Cost Error Recovery from Deep Learning Training Failures
Tanmaey Gupta, Sanjeev Krishnan, Rituraj Kumar, Abhishek Vijeev, Bhargav Gulavani, Nipun Kwatra, Ramachandran Ramjee, Muthian Sivathanu
2024 European Conference on Computer Systems | April 2024
SARATHI: Efficient LLM Inference by Piggybacking Decodes with Chunked Prefills
Amey Agrawal, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee
September 2023
Varuna: Scalable, Low-cost Training of Massive Deep Learning Models
Sanjith Athlur, Nitika Saran, Muthian Sivathanu, Ramachandran Ramjee, Nipun Kwatra
EuroSys 2022 | April 2022
Best Paper Award
Singularity: Planet-Scale, Preemptive and Elastic Scheduling of AI Workloads
Dharma Shukla, Muthian Sivathanu, Srinidhi Viswanatha, Bhargav Gulavani, Rimma Nehme, Amey Agrawal, Chen Chen, Nipun Kwatra, Ramachandran Ramjee, Pankaj Sharma, Atul Katiyar, Vipul Modi, Vaibhav Sharma, Abhishek Singh, Shreshth Singhal, Kaustubh Welankar, Lu Xun, Ravi Anupindi, Karthik Elangovan, Hasibur Rehman, Zhou Lin, Rahul Seetharaman, Cheng Xu, Eddie Ailijiang, Suresh Krishnappa, Mark Russinovich
February 2022
Balancing efficiency and fairness in heterogeneous GPU clusters for deep learning
Shubham Chaudhary, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Srinidhi Viswanatha
Fifteenth European Conference on Computer Systems (EuroSys'20) | April 2020
Gandiva: Introspective Cluster Scheduling for Deep Learning
Wencong Xiao, Romil Bhardwaj, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Zhenhua Han, Pratyush Patel, Xuan Peng, Hanyu Zhao, Quanlu Zhang, Fan Yang, Lidong Zhou
13th USENIX Symposium on Operating Systems Design and Implementation (OSDI 2018) | October 2018
Privado: Practical and Secure DNN Inference with Enclaves
Karan Grover, Shruti Tople, Shweta Shinde, Ranjita Bhagwan, Ramachandran Ramjee
September 2018
Scalable measurement of air pollution using COTS IoT devices
Varun Jain, Mansi Goel, Mukulika Maity, Vinayak Naik, Ramachandran Ramjee
WACI Workshop at 10th International Conference on Communication Systems & Networks (COMSNETS) | January 2018
WACI Master Award Winner
AutoCalib: Automatic Traffic Camera Calibration at Scale
Romil Bhardwaj, Gopi Krishna Tummala, G. Ramalingam, Ramachandran Ramjee, Prasun Sinha
ACM BuildSys 2017 | November 2017
[Best Paper Award Winner and Best Demo Award Winner]
Skip-Correlation for Multi-Power Wireless Carrier Sensing
Romil Bhardwaj, Krishna Chintalapudi, Ramachandran Ramjee
USENIX NSDI | March 2017
Blood Count on a Smartphone Microscope: Challenges
Uma P. Moravapalle, Amit Deshpande, Ashish Kapoor, Ramachandran Ramjee, Priya Ravi
HotMobile | February 2017
Big Data Analytics over Encrypted Datasets with Seabed
Antonis Papadimitriou, Ranjita Bhagwan, Nishanth Chandran, Ramachandran Ramjee, Andreas Haeberlen, Harmeet Singh , Abhishek Modi, Saikrishna Badrinarayanan
2016 USENIX OSDI | November 2016
IQ-Hopping: Distributed Oblivious Channel Selection for Wireless Networks
Apurv Bhartia, Deeparnab Chakrabarty, Krishna Chintalapudi, Lili Qiu, Bozidar Radunovic, Ramachandran Ramjee
MobiHoc '16 Proceedings of the 17th ACM International Symposium on Mobile Ad Hoc Networking and Computing, Paderborn, Germany | July 2016
ISBN: 978-1-4503-4184-4
A Critique of FCC’S TV White Space Regulations
Krishna Chintalapudi, Ramachandran Ramjee
GetMobile | January 2016, Vol 20: pp. 20-25
Insider: Towards Breaking Down Mobile App Silos
Vageesh Chandramouli, Abhijnan Chakraborty, Vishnu Navda, Saikat Guha, Venkat Padmanabhan, Ramachandran Ramjee, ,
TRIOS Workshop held in conjunction with the SIGOPS SOSP 2015 | September 2015
WiFi-XL: Extending WiFi to Wide Areas in White Spaces
Apurv Bhartia, Mahanth Gowda, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee, Deeparnab Chakrabarty, Lili Qiu, Romit Roy Chowdhury
MSR-TR-2014-132 | September 2014
Adtributor: Revenue Debugging in Advertising Systems
Ranjita Bhagwan, Rahul Kumar, Ramachandran Ramjee, George Varghese, Surjyakanta Mohapatra, Hemanth Manoharan, Piyush Shah
Symposium on Networked Systems Design and Implemenentation (NSDI) | April 2014
Coordinating Cellular Background Transfers using LoadSense
Venkat Padmanabhan, Ramachandran Ramjee, , Vishnu Navda
ACM Mobicom 2013 | September 2013
ACM Mobicom 2013
EnVi: Energy Efï¬cient Video Player for Mobiles
Sahil Suneja, Vishnu Navda, Ramachandran Ramjee, Eyal de Lara
CellNet 2013 workshop | June 2013
MiG: Efficient Migration of Desktop VMs using Semantic Compression
Anshul Rai, Ramachandran Ramjee, Ashok Anand, Venkat Padmanabhan, George Varghese
USENIX Annual Technical Conference | June 2013
USENIX Annual Technical Conference
RadioJockey: Mining Program Execution to Optimize Cellular Radio Usage
Pavan Kumar Athivarapu, Ranjita Bhagwan, Saikat Guha, Vishnu Navda, Ramachandran Ramjee, Dushyant Arora, Venkat Padmanabhan, George Varghese
In Proceedings of the 18th Annual International Conference on Mobile Computing and Networking (MobiCom) | August 2012
WiFi-NC : WiFi Over Narrow Channels
Krishna Chintalapudi, Bozidar Radunovic, Vlad Balan, Michael Buettener, Vishnu Navda, Ramachandran Ramjee, Srinivas Yerramalli
MSR-TR-2012-17 | April 2012
UC Berkeley Tech Report
WiFi-Nano : Reclaiming WiFi Efficiency through 800 ns slots
Eugenio Magsiretti, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee
Mobicom | September 2011
(selected among top 5 contenders for best paper award)
SpecNet: Spectrum Sensing Sans Frontières
Anand Padmanabha Iyer, Krishna Chintalapudi, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan, Chandra R. Murthy
8th USENIX Symposium on Networked Systems Design and Implementation (NSDI) | March 2011
Bartendr: A Practical Approach to Energy-aware Cellular Data Scheduling
Aaron Schulman, Vishnu Navda, Ramachandran Ramjee, Neil Spring, Pralhad Deshpande, Calvin Grunewald, Venkat Padmanabhan, Kamal Jain
Mobicom | September 2010
LiteGreen: Saving Energy in Networked Desktops Using Virtualization
Tathagata Das, Pradeep Padala, Venkat Padmanabhan, Ramachandran Ramjee, Kang G. Shin
USENIX Annual Technical Conference [BEST PAPER] | June 2010
USENIX Annual Technical Conference [BEST PAPER]
Best Paper
PRISM: Platform for Remote Sensing using Mobile Smartphones
Tathagata Das, Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee, Asankhaya Sharma
International Conference on Mobile Systems, Applications and Services (Mobisys) | June 2010
International Conference on Mobile Systems, Applications and Services (Mobisys)
NAPman: Network-Assisted Power Management for WiFi Devices
Eric Rozner, Vishnu Navda, Ramachandran Ramjee, Shravan Rayanchu
MobiSys | June 2010
MobiSys
EndRE: An End-System Redundancy Elimination Service for Enterprises
Bhavish Aggarwal, Aditya Akella, Ashok Anand, Athula Balachandran, Pushkar V. Chitnis, Chitra Muthukrishnan, Ramachandran Ramjee, George Varghese
Symposium on Networked Systems Design and Implementation (NSDI) | April 2010
Analytical Models for Energy Consumption in Infrastructure WLAN STAs Carrying TCP Traffic
P. Agrawal, A. Kumar, J. Kuri, M. K. Panda, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan
International Conference on Communication Systems and Networks (COMSNETS), Best Paper Award | January 2010
Cool-Tether: Energy Efficient On-the-fly WiFi Hot-spots using Mobile Phones
Vishnu Navda, Ramachandran Ramjee, Elizabeth Belding, Venkat Padmanabhan
International Conference on emerging Networking EXperiments and Technologies (CoNEXT) | December 2009
DirCast: A Practical and Efficient Wi-Fi Multicast System
Ranveer Chandra, Sandeep Karanth, Thomas Moscibroda, Vishnu Navda, Jitu Padhye, Ramachandran Ramjee, Lenin Ravindrananth
ICNP 2009: 17th IEEE International Conference on Network Protocols, Princeton, New Jersey | October 2009
Redundancy in Network Traffic: Findings and Implications
Ashok Anand, Chitra Muthukrishnan, Aditya Akella, Ramachandran Ramjee
Proceedings of ACM SIGMETRICS/Performance | June 2009
muNet: Harnessing Multiuser Capacity in Wireless Mesh Networks
Li Erran Li, Richard Alimi, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
Proceedings of IEEE Infocom Mini Symposium | April 2009
We present muNet, a wireless mesh network design and implementation to harness the multiuser capacity of wireless channels. Traditionally, media access control is designed to schedule one transmission between one sender and one receiver without interference at any given time. However, this design is suboptimal in terms of achieving the multiuser capacity of multi-access wireless channels. In muNet, we implement effective physical layer techniques called superposition coding and successive interference cancellation to enable simultaneous unicast transmissions from a single transmitter to multiple receivers as well as from multiple transmitters to a single receiver. We design the first practical MAC protocol that leverages such a physical layer and exposes the multiuser capacity to upper layers. We also present a simple, effective routing protocol that increases simultaneous transmission opportunities for the MAC layer. A proof-of-concept muNet is implemented on the GNU Radio platform. Measurements on the implementation shows that the throughput gains of muNet are significant (up to 93%).
Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee
ACM Sensys | November 2008
ACM Sensys
Raleigh, NC, USA
iPack: in-Network Packet Mixing for High Throughput Wireless Mesh Networks
Richard Alimi, Li Erran Li, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
IEEE Infocom | April 2008
Superposition Coding for Wireless Mesh Networks
Li (Erran) Li, Richard Alimi, Ramachandran Ramjee, Jingpu Shi, Yanjun Sun, Harish Viswanathan, Yang Richard Yang
Extended Abstract (4 pages) in ACM Mobicom | September 2007
Network Coding-Based Broadcast in Mobile Ad hoc Networks
Li Erran Li, Ramachandran Ramjee, Milind Buddhikot, Scott Miller
IEEE Infocom, Anchorage, AK, USA | May 2007
IEEE Infocom, Anchorage, AK, USA
-
Enhancing Tail Performance in Extreme Classifiers by Label Variance Reduction
Anirudh Buvanesh, Rahul Chand, Jatin Prakash, Bhawna Paliwal, Mudit Dhawan, Neelabh Madan, Deepesh Hada, Vidit Jain, Sonu Mehta, Yashoteja Prabhu, Manish Gupta, Ramachandran Ramjee, Manik Varma (manik)
ICLR 2024 | April 2024
Renee: End-to-end training of extreme classification models
Vidit Jain, Jatin Prakash, Deepak Saini, Jian Jiao, Ramachandran Ramjee, Manik Varma
In Proceedings of the Conference on Machine Learning and Systems, Miami, Florida | June 2023
-
Enhancing Tail Performance in Extreme Classifiers by Label Variance Reduction
Anirudh Buvanesh, Rahul Chand, Jatin Prakash, Bhawna Paliwal, Mudit Dhawan, Neelabh Madan, Deepesh Hada, Vidit Jain, Sonu Mehta, Yashoteja Prabhu, Manish Gupta, Ramachandran Ramjee, Manik Varma (manik)
ICLR 2024 | April 2024
Renee: End-to-end training of extreme classification models
Vidit Jain, Jatin Prakash, Deepak Saini, Jian Jiao, Ramachandran Ramjee, Manik Varma
In Proceedings of the Conference on Machine Learning and Systems, Miami, Florida | June 2023
Unsupervised Clustering using Pseudo-semi-supervised Learning
Divam Gupta, Ramachandran Ramjee, Nipun Kwatra, Muthian Sivathanu
Eighth International Conference on Learning Representations (ICLR) | April 2020
-
Privado: Practical and Secure DNN Inference with Enclaves
Karan Grover, Shruti Tople, Shweta Shinde, Ranjita Bhagwan, Ramachandran Ramjee
September 2018
Big Data Analytics over Encrypted Datasets with Seabed
Antonis Papadimitriou, Ranjita Bhagwan, Nishanth Chandran, Ramachandran Ramjee, Andreas Haeberlen, Harmeet Singh , Abhishek Modi, Saikrishna Badrinarayanan
2016 USENIX OSDI | November 2016
-
IQ-Hopping: Distributed Oblivious Channel Selection for Wireless Networks
Apurv Bhartia, Deeparnab Chakrabarty, Krishna Chintalapudi, Lili Qiu, Bozidar Radunovic, Ramachandran Ramjee
MobiHoc '16 Proceedings of the 17th ACM International Symposium on Mobile Ad Hoc Networking and Computing, Paderborn, Germany | July 2016
ISBN: 978-1-4503-4184-4
WiFi-XL: Extending WiFi to Wide Areas in White Spaces
Apurv Bhartia, Mahanth Gowda, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee, Deeparnab Chakrabarty, Lili Qiu, Romit Roy Chowdhury
MSR-TR-2014-132 | September 2014
-
TrafficSense: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkata N. Padmanabhan, Ramachandran Ramjee, Venkat Padmanabhan
MSR-TR-2008-59 | April 2008
Publications by Type
-
Taming Throughout-Latency Tradeoff in LLM Inference with Sarathi-Serve
Amey Agrawal, Nitin Kedia, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Alexey Tumanov, Ramachandran Ramjee
OSDI 2024 | May 2024
VIDUR: A Large-Scale Simulation Framework for LLM Inference
Amey Agrawal, Nitin Kedia, Jayashree Mohan, Ashish Panwar, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee, Alexey Tumanov
The Seventh Annual Conference on Machine Learning and Systems | May 2024
Just-In-Time Checkpointing: Low Cost Error Recovery from Deep Learning Training Failures
Tanmaey Gupta, Sanjeev Krishnan, Rituraj Kumar, Abhishek Vijeev, Bhargav Gulavani, Nipun Kwatra, Ramachandran Ramjee, Muthian Sivathanu
2024 European Conference on Computer Systems | April 2024
Enhancing Tail Performance in Extreme Classifiers by Label Variance Reduction
Anirudh Buvanesh, Rahul Chand, Jatin Prakash, Bhawna Paliwal, Mudit Dhawan, Neelabh Madan, Deepesh Hada, Vidit Jain, Sonu Mehta, Yashoteja Prabhu, Manish Gupta, Ramachandran Ramjee, Manik Varma (manik)
ICLR 2024 | April 2024
Renee: End-to-end training of extreme classification models
Vidit Jain, Jatin Prakash, Deepak Saini, Jian Jiao, Ramachandran Ramjee, Manik Varma
In Proceedings of the Conference on Machine Learning and Systems, Miami, Florida | June 2023
Varuna: Scalable, Low-cost Training of Massive Deep Learning Models
Sanjith Athlur, Nitika Saran, Muthian Sivathanu, Ramachandran Ramjee, Nipun Kwatra
EuroSys 2022 | April 2022
Best Paper Award
Unsupervised Clustering using Pseudo-semi-supervised Learning
Divam Gupta, Ramachandran Ramjee, Nipun Kwatra, Muthian Sivathanu
Eighth International Conference on Learning Representations (ICLR) | April 2020
Balancing efficiency and fairness in heterogeneous GPU clusters for deep learning
Shubham Chaudhary, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Srinidhi Viswanatha
Fifteenth European Conference on Computer Systems (EuroSys'20) | April 2020
Gandiva: Introspective Cluster Scheduling for Deep Learning
Wencong Xiao, Romil Bhardwaj, Ramachandran Ramjee, Muthian Sivathanu, Nipun Kwatra, Zhenhua Han, Pratyush Patel, Xuan Peng, Hanyu Zhao, Quanlu Zhang, Fan Yang, Lidong Zhou
13th USENIX Symposium on Operating Systems Design and Implementation (OSDI 2018) | October 2018
Scalable measurement of air pollution using COTS IoT devices
Varun Jain, Mansi Goel, Mukulika Maity, Vinayak Naik, Ramachandran Ramjee
WACI Workshop at 10th International Conference on Communication Systems & Networks (COMSNETS) | January 2018
WACI Master Award Winner
AutoCalib: Automatic Traffic Camera Calibration at Scale
Romil Bhardwaj, Gopi Krishna Tummala, G. Ramalingam, Ramachandran Ramjee, Prasun Sinha
ACM BuildSys 2017 | November 2017
[Best Paper Award Winner and Best Demo Award Winner]
Skip-Correlation for Multi-Power Wireless Carrier Sensing
Romil Bhardwaj, Krishna Chintalapudi, Ramachandran Ramjee
USENIX NSDI | March 2017
Blood Count on a Smartphone Microscope: Challenges
Uma P. Moravapalle, Amit Deshpande, Ashish Kapoor, Ramachandran Ramjee, Priya Ravi
HotMobile | February 2017
Big Data Analytics over Encrypted Datasets with Seabed
Antonis Papadimitriou, Ranjita Bhagwan, Nishanth Chandran, Ramachandran Ramjee, Andreas Haeberlen, Harmeet Singh , Abhishek Modi, Saikrishna Badrinarayanan
2016 USENIX OSDI | November 2016
IQ-Hopping: Distributed Oblivious Channel Selection for Wireless Networks
Apurv Bhartia, Deeparnab Chakrabarty, Krishna Chintalapudi, Lili Qiu, Bozidar Radunovic, Ramachandran Ramjee
MobiHoc '16 Proceedings of the 17th ACM International Symposium on Mobile Ad Hoc Networking and Computing, Paderborn, Germany | July 2016
ISBN: 978-1-4503-4184-4
Insider: Towards Breaking Down Mobile App Silos
Vageesh Chandramouli, Abhijnan Chakraborty, Vishnu Navda, Saikat Guha, Venkat Padmanabhan, Ramachandran Ramjee, ,
TRIOS Workshop held in conjunction with the SIGOPS SOSP 2015 | September 2015
Adtributor: Revenue Debugging in Advertising Systems
Ranjita Bhagwan, Rahul Kumar, Ramachandran Ramjee, George Varghese, Surjyakanta Mohapatra, Hemanth Manoharan, Piyush Shah
Symposium on Networked Systems Design and Implemenentation (NSDI) | April 2014
Coordinating Cellular Background Transfers using LoadSense
Venkat Padmanabhan, Ramachandran Ramjee, , Vishnu Navda
ACM Mobicom 2013 | September 2013
ACM Mobicom 2013
EnVi: Energy Efï¬cient Video Player for Mobiles
Sahil Suneja, Vishnu Navda, Ramachandran Ramjee, Eyal de Lara
CellNet 2013 workshop | June 2013
MiG: Efficient Migration of Desktop VMs using Semantic Compression
Anshul Rai, Ramachandran Ramjee, Ashok Anand, Venkat Padmanabhan, George Varghese
USENIX Annual Technical Conference | June 2013
USENIX Annual Technical Conference
RadioJockey: Mining Program Execution to Optimize Cellular Radio Usage
Pavan Kumar Athivarapu, Ranjita Bhagwan, Saikat Guha, Vishnu Navda, Ramachandran Ramjee, Dushyant Arora, Venkat Padmanabhan, George Varghese
In Proceedings of the 18th Annual International Conference on Mobile Computing and Networking (MobiCom) | August 2012
WiFi-Nano : Reclaiming WiFi Efficiency through 800 ns slots
Eugenio Magsiretti, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee
Mobicom | September 2011
(selected among top 5 contenders for best paper award)
SpecNet: Spectrum Sensing Sans Frontières
Anand Padmanabha Iyer, Krishna Chintalapudi, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan, Chandra R. Murthy
8th USENIX Symposium on Networked Systems Design and Implementation (NSDI) | March 2011
Bartendr: A Practical Approach to Energy-aware Cellular Data Scheduling
Aaron Schulman, Vishnu Navda, Ramachandran Ramjee, Neil Spring, Pralhad Deshpande, Calvin Grunewald, Venkat Padmanabhan, Kamal Jain
Mobicom | September 2010
LiteGreen: Saving Energy in Networked Desktops Using Virtualization
Tathagata Das, Pradeep Padala, Venkat Padmanabhan, Ramachandran Ramjee, Kang G. Shin
USENIX Annual Technical Conference [BEST PAPER] | June 2010
USENIX Annual Technical Conference [BEST PAPER]
Best Paper
PRISM: Platform for Remote Sensing using Mobile Smartphones
Tathagata Das, Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee, Asankhaya Sharma
International Conference on Mobile Systems, Applications and Services (Mobisys) | June 2010
International Conference on Mobile Systems, Applications and Services (Mobisys)
NAPman: Network-Assisted Power Management for WiFi Devices
Eric Rozner, Vishnu Navda, Ramachandran Ramjee, Shravan Rayanchu
MobiSys | June 2010
MobiSys
EndRE: An End-System Redundancy Elimination Service for Enterprises
Bhavish Aggarwal, Aditya Akella, Ashok Anand, Athula Balachandran, Pushkar V. Chitnis, Chitra Muthukrishnan, Ramachandran Ramjee, George Varghese
Symposium on Networked Systems Design and Implementation (NSDI) | April 2010
Analytical Models for Energy Consumption in Infrastructure WLAN STAs Carrying TCP Traffic
P. Agrawal, A. Kumar, J. Kuri, M. K. Panda, Vishnu Navda, Ramachandran Ramjee, Venkat Padmanabhan
International Conference on Communication Systems and Networks (COMSNETS), Best Paper Award | January 2010
Cool-Tether: Energy Efficient On-the-fly WiFi Hot-spots using Mobile Phones
Vishnu Navda, Ramachandran Ramjee, Elizabeth Belding, Venkat Padmanabhan
International Conference on emerging Networking EXperiments and Technologies (CoNEXT) | December 2009
DirCast: A Practical and Efficient Wi-Fi Multicast System
Ranveer Chandra, Sandeep Karanth, Thomas Moscibroda, Vishnu Navda, Jitu Padhye, Ramachandran Ramjee, Lenin Ravindrananth
ICNP 2009: 17th IEEE International Conference on Network Protocols, Princeton, New Jersey | October 2009
Redundancy in Network Traffic: Findings and Implications
Ashok Anand, Chitra Muthukrishnan, Aditya Akella, Ramachandran Ramjee
Proceedings of ACM SIGMETRICS/Performance | June 2009
muNet: Harnessing Multiuser Capacity in Wireless Mesh Networks
Li Erran Li, Richard Alimi, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
Proceedings of IEEE Infocom Mini Symposium | April 2009
We present muNet, a wireless mesh network design and implementation to harness the multiuser capacity of wireless channels. Traditionally, media access control is designed to schedule one transmission between one sender and one receiver without interference at any given time. However, this design is suboptimal in terms of achieving the multiuser capacity of multi-access wireless channels. In muNet, we implement effective physical layer techniques called superposition coding and successive interference cancellation to enable simultaneous unicast transmissions from a single transmitter to multiple receivers as well as from multiple transmitters to a single receiver. We design the first practical MAC protocol that leverages such a physical layer and exposes the multiuser capacity to upper layers. We also present a simple, effective routing protocol that increases simultaneous transmission opportunities for the MAC layer. A proof-of-concept muNet is implemented on the GNU Radio platform. Measurements on the implementation shows that the throughput gains of muNet are significant (up to 93%).
Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkat Padmanabhan, Ramachandran Ramjee
ACM Sensys | November 2008
ACM Sensys
Raleigh, NC, USA
iPack: in-Network Packet Mixing for High Throughput Wireless Mesh Networks
Richard Alimi, Li Erran Li, Ramachandran Ramjee, Harish Viswanathan, Yang Richard Yang
IEEE Infocom | April 2008
Superposition Coding for Wireless Mesh Networks
Li (Erran) Li, Richard Alimi, Ramachandran Ramjee, Jingpu Shi, Yanjun Sun, Harish Viswanathan, Yang Richard Yang
Extended Abstract (4 pages) in ACM Mobicom | September 2007
Network Coding-Based Broadcast in Mobile Ad hoc Networks
Li Erran Li, Ramachandran Ramjee, Milind Buddhikot, Scott Miller
IEEE Infocom, Anchorage, AK, USA | May 2007
IEEE Infocom, Anchorage, AK, USA
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vAttention: Dynamic Memory Management for Serving LLMs without PagedAttention
Ramya Prabhu, Ajay Nayak, Jayashree Mohan, Ramachandran Ramjee, Ashish Panwar
May 2024
SARATHI: Efficient LLM Inference by Piggybacking Decodes with Chunked Prefills
Amey Agrawal, Ashish Panwar, Jayashree Mohan, Nipun Kwatra, Bhargav S. Gulavani, Ramachandran Ramjee
September 2023
Privado: Practical and Secure DNN Inference with Enclaves
Karan Grover, Shruti Tople, Shweta Shinde, Ranjita Bhagwan, Ramachandran Ramjee
September 2018
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Singularity: Planet-Scale, Preemptive and Elastic Scheduling of AI Workloads
Dharma Shukla, Muthian Sivathanu, Srinidhi Viswanatha, Bhargav Gulavani, Rimma Nehme, Amey Agrawal, Chen Chen, Nipun Kwatra, Ramachandran Ramjee, Pankaj Sharma, Atul Katiyar, Vipul Modi, Vaibhav Sharma, Abhishek Singh, Shreshth Singhal, Kaustubh Welankar, Lu Xun, Ravi Anupindi, Karthik Elangovan, Hasibur Rehman, Zhou Lin, Rahul Seetharaman, Cheng Xu, Eddie Ailijiang, Suresh Krishnappa, Mark Russinovich
February 2022
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WiFi-XL: Extending WiFi to Wide Areas in White Spaces
Apurv Bhartia, Mahanth Gowda, Krishna Chintalapudi, Bozidar Radunovic, Ramachandran Ramjee, Deeparnab Chakrabarty, Lili Qiu, Romit Roy Chowdhury
MSR-TR-2014-132 | September 2014
WiFi-NC : WiFi Over Narrow Channels
Krishna Chintalapudi, Bozidar Radunovic, Vlad Balan, Michael Buettener, Vishnu Navda, Ramachandran Ramjee, Srinivas Yerramalli
MSR-TR-2012-17 | April 2012
UC Berkeley Tech Report
TrafficSense: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones
Prashanth Mohan, Venkata N. Padmanabhan, Ramachandran Ramjee, Venkat Padmanabhan
MSR-TR-2008-59 | April 2008
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A Critique of FCC’S TV White Space Regulations
Krishna Chintalapudi, Ramachandran Ramjee
GetMobile | January 2016, Vol 20: pp. 20-25