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US 9,594,521 B2Granted
Scheduling of data migration
AssigneeAdvanced Micro Devices, Inc.
InventorsSergey Blagodurov, Andrew G. Kegel
Life of this patent
Estimating the term…
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.
Claims14
A method of scheduling data migration comprising:
- 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, wherein determining that the data is likely to be used by the I/O device comprises monitoring an event associated with translating addresses by a memory management unit local to the I/O device,
- wherein monitoring the event associated with translating addresses by the memory management unit local to the I/O device includes one or more of:
- monitoring data having a memory address in a peripheral page service request event log file, monitoring data having a memory address in an error event log file, and monitoring data having a memory address in a command issued by the I/O device to invalidate the data.
2 more elements
A data processing node comprising:
- a data processor;
- and
- an input/output memory management unit (IOMMU) coupled to the data processor and adapted to associate logical memory pages to corresponding physical pages wherein each physical page may be located in either a local memory device associated with the data processing node or in a remote memory device associated with another processing node, wherein the IOMMU is adapted to determine whether data in a physical page in the remote memory device is likely to be used by an input/output (I/O) device coupled to and associated with the processing node, and in response to determining that the data is likely to be used by the I/O device, to schedule migration of the data in the physical page at the remote memory device to a physical page at the local memory device,
- wherein the IOMMU determines that data is likely to be used by the I/O device by monitoring the output of at least one address translation circuit associated with the I/O device, and
- wherein the IOMMU monitors the output of the at least one address translation circuit associated with the I/O device by monitoring a memory address in a log file.
2 more elements
A data processing node comprising:
- a data processor;
- and
- an input/output memory management unit (IOMMU) coupled to the data processor and adapted to associate logical memory pages to corresponding physical pages wherein each physical page may be located in either a local memory device associated with the data processing node or in a remote memory device associated with another processing node, wherein the IOMMU is adapted to determine whether data in a physical page in the remote memory device is likely to be used by an input/output (I/O) device coupled to and associated with the processing node, and in response to determining that the data is likely to be used by the I/O device, to schedule migration of the data in the physical page at the remote memory device to a physical page at the local memory device,
- wherein the IOMMU determines that data is likely to be used by the I/O device by monitoring the output of at least one address translation circuit associated with the I/O device, and
- wherein the IOMMU monitors the output of the at least one address translation circuit associated with the I/O device by monitoring a memory address in a command issued by the I/O device to invalidate the data.
2 more elements
Dependencies are inferred from the claim text.