דניאל הנדלר

אקדמי בכיר

Detectable Recovery of Lock-Free Data Structures

Hagit Attiya, Ohad Ben-Baruch, Panagiota Fatourou, Danny Hendler, Eleftherios Kosmas

This paper presents a generic approach for deriving detectably recoverable implementations of many widely-used concurrent data structures. Such implementations are appealing for emerging systems featuring byte-addressable non-volatile main memory (NVMM), whose persistence allows to efficiently resurrect failed threads after crashes. Detectable recovery ensures that after a crash, every executed operation is able to recover and return a correct response, and that the state of the data structure is not corrupted. Our approach, called Tracking, amends descriptor objects used in existing lock-free helping schemes with additional fields that track an operation's progress towards completion and persists these fields in order to ensure detectable recovery. Tracking avoids full-fledged logging and tracks the progress of concurrent operations in a per-thread manner, thus reducing the cost of ensuring detectable recovery. We have applied Tracking to derive detectably recoverable implementations of a linked list, a binary search tree, and an exchanger. Our experimental analysis introduces a new way of analyzing the cost of persistence instructions, not by simply counting them but by separating them into categories based on the impact they have on the performance. The analysis reveals that understanding the actual persistence cost of an algorithm in machines with real NVMM, is more complicated than previously thought, and requires a thorough evaluation, since the impact of different persistence instructions on performance may greatly vary. We consider this analysis to be one of the major contributions of the paper.

שפת פרסום אנגלית
דפים 262-277
סטטוס פרסום פורסם - 28.03.2022

Keywords

NVM-based computing
concurrent data structures
exchanger
linked-list
lock-freedom
non-volatile memory
persistence
persistence cost analysis
recoverable algorithms and data structures
synchronization
tree

ASJC Scopus subject areas

Software
גישה למסמך
10.1145/3503221.3508444
קבצים וקישורים אחרים
Link to publication in Scopus