Methods, devices, and systems for prefetching data. First data is loaded from a first memory location. The first data in cached in a cache memory. Other data is prefetched to the cache memory based on a compression of the first data and a compression of the other data. In some implementations, the compression of the first data and the compression of the other data are determined based on metadata associated with the first data and metadata associated with the other data. In some implementations, the other data is prefetched to the cache memory based on a total of a compressed size of the first data and a compressed size of the other data being less than a threshold size. In some implementations, the other data is not prefetched to the cache memory based on the other data being uncompressed.

Embodiments of the present disclosure generally relate to an NVMe storage device having a controller memory manager and a method of accessing an NVMe storage device having a controller memory manager. In one embodiment, a storage device comprises a non-volatile memory, a volatile memory, and a controller memory manager. The controller memory manager is operable to store one or more NVMe data structures within the non-volatile memory and the volatile memory.

Systems, apparatuses, and methods related to selectable cache writing policies for cache management are described. A cache writing policy to manage a cache can be selected among cache writing policies based on a number of tracked criteria, which can provide cache management with a particular cache writing policy that will likely incur less latency than the other policies.

A method for maintaining statistics for data elements in a cache is disclosed. The method maintains a heterogeneous cache comprising a higher performance portion and a lower performance portion. The method maintains, within the lower performance portion, a ghost cache containing statistics for data elements that are currently contained in the heterogeneous cache, and data elements that have been demoted from the heterogeneous cache within a specified time interval. The method calculates a size of the ghost cache based on an amount of frequently accessed data that is stored in backend storage volumes behind the heterogeneous cache. The method alters the size of the ghost cache as the amount of frequently accessed data changes. A corresponding system and computer program product are also disclosed.

A network interface device comprises a programmable interface configured to provide a device interface with at least one bus between the network interface device and a host device. The programmable interface is programmable to support a plurality of different types of a device interface.

A network interface device comprises a programmable interface configured to provide a device interface with at least one bus between the network interface device and a host device. The programmable interface is programmable to support a plurality of different types of a device interface.

A caching system including a first sub-cache and a second sub-cache in parallel with the first sub-cache, wherein the second sub-cache includes a set of cache lines, line type bits configured to store an indication that a corresponding cache line of the set of cache lines is configured to store write-miss data, and an eviction controller configured to flush stored write-miss data based on the line type bits.

A caching system including a first sub-cache and a second sub-cache in parallel with the first sub-cache, wherein the second sub-cache includes a set of cache lines, line type bits configured to store an indication that a corresponding cache line of the set of cache lines is configured to store write-miss data, and an eviction controller configured to flush stored write-miss data based on the line type bits.

A method is described, which includes receiving, by a memory subsystem, a memory command targeted at a memory array; determining, by the memory subsystem, if the memory command is a high priority memory command; and determining if the memory subsystem is processing any non-high priority memory commands. The memory subsystem enables a read page cache mode for processing the memory command in response to determining that (1) the memory command is a high priority memory command and (2) the memory subsystem is not processing any non-high priority memory commands Thereafter, the memory subsystem processes the memory command using the read page cache mode.

A method for constructing a persistent memory index in a non-uniform memory access architecture includes: maintaining partial persistent views in a persistent memory and maintaining a global volatile view in a DRAM; an underlying persistent memory index processing a request in a foreground thread when cold data is accessed; when hot data is accessed, reading a key-value pair for a piece of hot data in the global volatile view in response to a query operation carried in the request, and in response to an insert/update/delete operation carried in the request, updating a local partial persistent view and the global volatile view; and in response to a hotspot migration, a background thread generating new partial persistent views and a new global volatile view, and recycling the partial persistent views and the global volatile view for old hot data into the underlying persistent memory index.