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PLDI 2021
Sun 20 - Sat 26 June 2021 PLDI
Wed 23 Jun 2021 09:20 - 09:25 at PLDI-A - Talks 1A: Concurrent and Distributed Programming
Wed 23 Jun 2021 21:20 - 21:25 at PLDI-A - Talks 1A: Concurrent and Distributed Programming

Sharding is a popular way to achieve scalability in blockchain protocols, increasing their throughput by partitioning the set of transaction validators into a number of smaller committees, splitting the workload. Existing approaches for blockchain sharding, however, do not scale well when concurrent transactions alter the same replicated state component—a common scenario in Ethereum-style smart contracts.

We propose a novel approach for efficiently sharding such transactions. It is based on a folklore idea: state-manipulating atomic operations that commute can be processed in parallel, with their cumulative result defined deterministically, while executing non-commuting operations requires one to own the state they alter. We present CoSplit—a static program analysis tool that soundly infers ownership and commutativity summaries for smart contracts and translates those summaries to sharding signatures that are used by the blockchain protocol to maximise parallelism. Our evaluation shows that using CoSplit introduces negligible overhead to the transaction validation cost, while the inferred signatures allow the system to achieve a significant increase in transaction processing throughput for real-world smart contracts.

Wed 23 Jun

Displayed time zone: Eastern Time (US & Canada) change

09:00 - 09:35
Talks 1A: Concurrent and Distributed ProgrammingPLDI at PLDI-A +12h
09:00
5m
Talk
Abstraction for Conflict-Free Replicated Data Types
PLDI
Hongjin Liang Nanjing University, Xinyu Feng Nanjing University
DOI
09:05
5m
Talk
Modular Data-Race-Freedom Guarantees in the Promising Semantics
PLDI
Minki Cho Seoul National University, Sung-Hwan Lee Seoul National University, Chung-Kil Hur Seoul National University, Ori Lahav Tel Aviv University
DOI
09:10
5m
Talk
Viaduct: An Extensible, Optimizing Compiler for Secure Distributed Programs
PLDI
Coşku Acay Cornell University, Rolph Recto Cornell University, Joshua Gancher Cornell University, Andrew C. Myers Cornell University, Elaine Shi Cornell University
DOI Pre-print
09:15
5m
Talk
Canary: Practical Static Detection of Inter-thread Value-Flow Bugs
PLDI
Yuandao Cai Hong Kong University of Science and Technology, Peisen Yao Hong Kong University of Science and Technology, Charles Zhang Hong Kong University of Science and Technology
DOI
09:20
5m
Talk
Practical Smart Contract Sharding with Ownership and Commutativity Analysis
PLDI
George Pîrlea National University of Singapore, Amrit Kumar Zilliqa Research, Ilya Sergey Yale-NUS College; National University of Singapore
DOI
09:25
5m
Talk
Snapshot-Free, Transparent, and Robust Memory Reclamation for Lock-Free Data Structures
PLDI
Ruslan Nikolaev Virginia Tech, Binoy Ravindran Virginia Tech
DOI
09:30
5m
Talk
Concurrent Deferred Reference Counting with Constant-Time Overhead
PLDI
Daniel Anderson Carnegie Mellon University, Guy E. Blelloch Carnegie Mellon University, Yuanhao Wei Carnegie Mellon University
DOI
21:00 - 21:35
Talks 1A: Concurrent and Distributed ProgrammingPLDI at PLDI-A
21:00
5m
Talk
Abstraction for Conflict-Free Replicated Data Types
PLDI
Hongjin Liang Nanjing University, Xinyu Feng Nanjing University
DOI
21:05
5m
Talk
Modular Data-Race-Freedom Guarantees in the Promising Semantics
PLDI
Minki Cho Seoul National University, Sung-Hwan Lee Seoul National University, Chung-Kil Hur Seoul National University, Ori Lahav Tel Aviv University
DOI
21:10
5m
Talk
Viaduct: An Extensible, Optimizing Compiler for Secure Distributed Programs
PLDI
Coşku Acay Cornell University, Rolph Recto Cornell University, Joshua Gancher Cornell University, Andrew C. Myers Cornell University, Elaine Shi Cornell University
DOI Pre-print
21:15
5m
Talk
Canary: Practical Static Detection of Inter-thread Value-Flow Bugs
PLDI
Yuandao Cai Hong Kong University of Science and Technology, Peisen Yao Hong Kong University of Science and Technology, Charles Zhang Hong Kong University of Science and Technology
DOI
21:20
5m
Talk
Practical Smart Contract Sharding with Ownership and Commutativity Analysis
PLDI
George Pîrlea National University of Singapore, Amrit Kumar Zilliqa Research, Ilya Sergey Yale-NUS College; National University of Singapore
DOI
21:25
5m
Talk
Snapshot-Free, Transparent, and Robust Memory Reclamation for Lock-Free Data Structures
PLDI
Ruslan Nikolaev Virginia Tech, Binoy Ravindran Virginia Tech
DOI
21:30
5m
Talk
Concurrent Deferred Reference Counting with Constant-Time Overhead
PLDI
Daniel Anderson Carnegie Mellon University, Guy E. Blelloch Carnegie Mellon University, Yuanhao Wei Carnegie Mellon University
DOI