PPoPP 2026
Sat 31 January - Wed 4 February 2026 Sydney, Australia
co-located with HPCA/CGO/PPoPP/CC 2026
Mon 2 Feb 2026 14:30 - 14:50 at Pyrmont - Concurrent Data Structures Chair(s): Calin Cascaval

We present a new blocking linearizable stack implementation which utilizes sharding and fetch&increment to achieve significantly better performance than all existing concurrent stacks. The proposed implementation is based on a novel elimination mechanism and a new combining approach that are efficiently blended to gain high performance. Our implementation results in enhanced parallelism and low contention when accessing the shared stack. Experiments show that the proposed stack implementation outperforms all existing concurrent stacks by up to 2X in most workloads. It is particularly efficient in systems supporting a large number of threads and in high contention scenarios.

Mon 2 Feb

Displayed time zone: Hobart change

14:10 - 15:30
Concurrent Data StructuresMain Conference at Pyrmont
Chair(s): Calin Cascaval Google DeepMind
14:10
20m
Talk
UFO Trees: Practical and Provably-Efficient Parallel Batch-Dynamic TreesBest Paper Nominee
Main Conference
Quinten De Man University of Maryland, Atharva Sharma University of Maryland, Kishen N Gowda University of Maryland, Laxman Dhulipala University of Maryland, College Park
DOI
14:30
20m
Talk
Sharded Elimination and Combining for Highly-Efficient Concurrent Stacks
Main Conference
Ajay Singh FORTH ICS, Nikos Metaxakis , Panagiota Fatourou FORTH ICS and University of Crete, Greece
DOI
14:50
20m
Talk
Concurrent Balanced Augmented Trees
Main Conference
Evan Wrench University of British Columbia, Ajay Singh FORTH ICS, Younghun Roh Massachusetts Institute of Technology, Panagiota Fatourou University of Crete & FORTH, Siddhartha Jayanti Google Research, Eric Ruppert York University, Yuanhao Wei University of British Columbia
DOI
15:10
20m
Talk
Parallel Dynamic Spatial Indexes
Main Conference
Ziyang Men University of California, Riverside, Bo Huang University of California, Riverside, Yan Gu University of California, Riverside, Yihan Sun University of California, Riverside
DOI