Write a Blog >>
CC 2021
Tue 2 - Wed 3 March 2021 Online Conference
Tue 2 Mar 2021 13:30 - 13:45 at CC Virtual Room - Optimization Chair(s): Christophe Dubach

In prior work we proposed Zeroploit, a transform that duplicates code, specializes one path assuming certain key program operands, called versioning variables, are zero, and leaves the other path unspecialized. Dynamically, depending on the versioning variable’s value, either the specialized fast path or the default slow path will execute. We evaluated Zeroploit with hand-optimized codes in that work.

In this paper, we present PGZ, a completely automated, profile-guided compiler approach for Zeroploit. Our compiler automatically determines which versioning variables or combinations thereof are profitable, and determines the code region to duplicate and specialize. PGZ's heuristic takes operand zero value probabilities as input and it then uses classical techniques such as constant folding and dead-code elimination to estimate the potential savings of specializing a versioning variable. PGZ transforms profitable candidates, yielding an average speedup of 21.2% for targeted shader programs, and an average frame-rate speedup of 4.4% across a collection of modern gaming applications on an NVIDIA GeForce RTX 2080 GPU.

Tue 2 Mar

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

13:30 - 14:15
OptimizationCC Research Papers at CC Virtual Room
Chair(s): Christophe Dubach McGill University
13:30
15m
Talk
PGZ: Automatic Zero-Value Code Specialization
CC Research Papers
13:45
15m
Talk
Exploring the Space of Optimization Sequences for Code-Size Reduction: Insights and ToolsArtifacts Evaluated – Reusable v1.1Results Reproduced v1.1Artifacts Available v1.1
CC Research Papers
Anderson Faustino da Silva State University of Maringá, Bernardo N. B. de Lima Federal University of Minas Gerais, Fernando Magno Quintão Pereira Federal University of Minas Gerais
14:00
15m
Talk
PolyBench/Python: Benchmarking Python Environments with Polyhedral OptimizationsArtifacts Evaluated – Reusable v1.1Artifacts Available v1.1
CC Research Papers
Miguel Á. Abella-González Universidade da Coruña, Pedro Carollo-Fernández Universidade da Coruña, Louis-Noël Pouchet Colorado State University, Fabrice Rastello Inria, Gabriel Rodríguez Universidade da Coruña