Abstract:
A memory module stores memory access metadata reflecting information about memory accesses to the memory module. The memory access metadata can indicate the number of times a particular unit of data (e.g., a row of data, a unit of data corresponding to a cache line, and the like) has been read, written, had one or more of its bits flipped, and the like. Modifications to the embedded access metadata can be made by a control module at the memory module itself, thereby reducing overhead at a processor core. In addition, the control module can be configured to record different access metadata for different memory locations of the memory module.
Abstract:
In one form, scheduling data migration comprises determining whether the data is likely to be used by an input/output (I/O) device, the data being at a location remote to the I/O device; and scheduling the data for migration from the remote location to a location local to the I/O device in response to determining that the data is likely to be used by the I/O device.
Abstract:
A processor modifies memory management mode for a range of memory locations of a multilevel memory hierarchy based on changes in an application phase of an application executing at a processor. The processor monitors the application phase (e.g.,. computation-bound phase, input/output phase, or memory access phase) of the executing application and in response to a change in phase consults a management policy to identify a memory management mode. The processor automatically reconfigures a memory controller and other modules so that a range of memory locations of the multilevel memory hierarchy are managed according to the identified memory management mode. By changing the memory management mode for the range of memory locations according to the application phase, the processor improves processing efficiency and flexibility.