International Business Machines Corporation

Saransh Gupta

Daniel Waddington

An embodiment includes a virtual machine (VM) memory synchronization process for improved failure tolerance. The process includes writing, by an intelligent memory controller (IMC), current snapshot data to a first series of contiguous memory addresses, where the current snapshot data is received by the IMC from a memory of an active VM via a direct memory access (DMA) transfer operation. The IMC executes concurrent threads associated with respective spans of the contiguous memory addresses, where the concurrent threads control compression processing of respective portions of the current snapshot data resulting in corresponding portions of processed current snapshot data, where the concurrent threads comprise a thread bound to a hardware accelerator that performs the compression processing of a portion of the current snapshot data. The process then transmits the processed current snapshot data to a standby VM as a current synchronization snapshot of the active VM.

Accelerated encoding for virtual machine synchronization

Embodiments of the present disclosure provide an enhanced system and methods for optimizing data placement in a memory hierarchy. A disclosed non-limiting computer-implemented method configures a counter block comprising access frequency counters mapped into an application memory space, and configures a counter map, where each entry in the counter map associates an application-defined memory region with the access frequency counters of the counter block. A memory controller identifies a memory access in a given application-defined memory region and compares an access address with a mask in the counter map to track the memory access. The memory controller generates a heatmap representing a frequency count of accesses to quantized memory using the access frequency counters. Generating the heatmap is performed by memory controller hardware.

Growing community of inventors

San Jose, CA, United States of America

Saransh Gupta