Memory hub and method for memory system performance monitoring
First Claim
Patent Images
1. A memory module, comprising:
- a plurality of memory devices; and
a memory hub, comprising;
a link interface receiving memory requests for access to memory cells in at least one of the memory devices;
a memory device interface coupled to the memory devices, the memory device interface being operable to transmit memory requests to the memory devices for access to memory cells in at least one of the memory devices and to receive read data responsive to at least some of the memory requests; and
a performance monitor coupled to the memory device interface, the performance monitor operable to track at least one performance metric related to the performance of the memory hub or the memory devices connected to the hub.
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Abstract
A memory module includes a memory hub coupled to several memory devices. The memory hub includes at least one performance counter that tracks one or more system metrics—for example, page hit rate, number or percentage of prefetch hits, cache hit rate or percentage, read rate, number of read requests, write rate, number of write requests, rate or percentage of memory bus utilization, local hub request rate or number, and/or remote hub request rate or number.
226 Citations
32 Claims
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1. A memory module, comprising:
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a plurality of memory devices; and a memory hub, comprising; a link interface receiving memory requests for access to memory cells in at least one of the memory devices; a memory device interface coupled to the memory devices, the memory device interface being operable to transmit memory requests to the memory devices for access to memory cells in at least one of the memory devices and to receive read data responsive to at least some of the memory requests; and a performance monitor coupled to the memory device interface, the performance monitor operable to track at least one performance metric related to the performance of the memory hub or the memory devices connected to the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A memory hub, comprising:
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a link interface receiving memory requests for access to memory cells in at least one of a plurality of memory devices; a memory device interface coupled to the memory devices, the memory device interface being operable to transmit memory requests to the memory devices for access to memory cells in at least one of the memory devices and to receive read data responsive to at least some of the memory requests; and a performance monitor coupled to the memory device interface, the performance monitor operable to track at least one performance metric related to the performance of the memory hub or the memory devices connected to the hub. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer system, comprising:
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a central processing unit (“
CPU”
);a system controller coupled to the CPU, the system controller having an input port and an output port; an input device coupled to the CPU through the system controller; an output device coupled to the CPU through the system controller; a storage device coupled to the CPU through the system controller; a plurality of memory modules, each of the memory modules comprising; a plurality of memory devices; and a memory hub, comprising; a link interface receiving memory requests for access to memory cells in at least one of the memory devices; a memory device interface coupled to the memory devices, the memory device interface being operable to transmit memory requests to the memory devices for access to memory cells in at least one of the memory devices and to receive read data responsive to at least some of the memory requests; and a performance monitor coupled to the memory device interface, the performance monitor operable to track at least one performance metric related to the performance of the memory hub or the memory devices connected to the hub. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of reading data from a memory module, comprising:
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receiving memory requests for access to a memory device mounted on the memory module; transmitting the memory requests to the memory device responsive to the received memory request, at least some of the memory requests being memory requests to read data; receiving read data responsive to the read memory requests; and tracking with the memory module at least one performance metric of the memory module. - View Dependent Claims (32)
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Specification