Persistent internal memory transaction processing cache management method and device

Abstract

The invention provides a persistent internal memory transaction processing cache management method and device. The method comprises the steps of reading, by a transaction, original data from a nonvolatile internal memory to a processor for caching before the start of the transaction, and executing the transaction by the processor; allocating, by the transaction, a space for produced new data during the execution of the transaction, and adopting a cache stealing write-back technique to allow persisting of un-submitted data; forcibly persisting transaction data or state to the nonvolatile internal memory during the submission or interruption of the transaction; writing back the transaction data to an original data address after the transaction data or state has been persisted to the nonvolatile internal memory, and adopting a cache non-forced write-back technique to not forcibly persist submitted data to the nonvolatile internal memory; periodically persisting, by the transaction, cache data to the nonvolatile internal memory by means of forced integral brush-back; performing fault recovery processing on the transaction data when a fault occurs in a system. By adopting the method, the data replication and data persisting frequency in the persistent internal memory can be reduced.

Description

technical field [0001] The invention relates to the technical field of non-volatile main memory storage, in particular to a persistent memory transaction processing cache management method and device. Background technique [0002] Non-volatile memory (Non-Volatile Memory, NVM) is a new type of byte-addressable memory-level storage device, such as phase change memory (PCM, Phase Change Memory), spin torque memory (STT-RAM, Spin -Torque Transfer RAM), Resistive RAM (RRAM, Resistive RAM), etc. Non-volatile memory has the advantages of low read and write latency, high bandwidth, non-volatility, and low energy consumption. Its read and write performance is close to traditional DRAM memory, and it provides the same persistence as traditional disk external memory. Therefore, memory-level persistent storage (also called "persistent memory") built with non-volatile memory can provide data persistence at the memory level without writing back to disk, greatly improving the performance...

AI Technical Summary

Problems solved by technology

The traditional software transaction management method needs to introduce more flushing (such as clflush) and barrier (such as mfence) operations in the persistent memory, which has a great impact on the CPU cache efficiency, which in turn affects the overall performance of the system

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