Updating metadata in hardware transactional memory user aborts

US11474995B2 · kind B2 · utility

Assignee

• Huawei Technologies Co., Ltd. · CN

Inventors

• Hillel Avni · Munich, DE
• Aharon Avitzur · Munich, DE

Key dates

• Filing date: Oct 18, 2019
• Grant date: Oct 18, 2022
• Expiry date: Oct 15, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F16/2308
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

A system for managing abort events of Hardware Transactional Memory (HTM) transactions to an in-memory database, comprising a processor adapted to control a plurality of abort events of a plurality of database transactions held concurrently to a shared in-memory database and a method for managing abort events comprising analyzing a metadata record associated with each potential abort event, where the metadata record comprises a row ID value and a row version value of a certain one of a plurality of rows of a database that is concurrently accessed by an aborting HTM transaction and another HTM transaction, comparing the row ID value and the row version value to a local ID value and a local version value of the aborting HTM transaction and determining a contention condition between the aborting HTM transaction and the other HTM transaction.