Method, apparatus, and system for memory read transaction biasing in mirrored mode to provide thermal management
A thermal management that redirects the target of read transactions from a thermally failed Dual Inline Memory Module (DIMM) in one mirror, to the corresponding DIMM in the other mirror. The memory controller or MCH would effectively bias the read transactions toward the mirror that is best able to respond based on thermal feedback. Likewise, this may be used as a temporary redirection that continues for only as long as was required to reduce the operating temperature in the failing DIMM.
1. A method for thermal management of a memory subsystem of at least a first and second DIMM comprising
sensing a temperature for a first DIMM that meets or exceeds a predetermined threshold; and
redirecting a read transaction from the first DIMM in one mirror, to the corresponding second DIMM in the other mirror, if the sensed temperature of the first DIMM has met or exceeded the predetermined threshold,
disabling the redirection of the read transaction from the first DIMM when the sensed temperature of the first DIMM decreases below the predetermined threshold.
2. A memory controller hub (MCH) comprising:
the MCH to receive write and read transactions from a CPU; and
the MCH to redirect a read transaction from a first DIMM in one mirror that has a sensed temperature that meets or exceeds a predetermined threshold, to a corresponding second DIMM in the other mirror; and the MCH disabling the redirection of the read transaction from the first DIMM when the sensed temperature of the first DIMM decreases below the predetermined threshold.
3. A memory controller comprising:
the memory controller to receive write and read transactions from a CPU; and
the memory controller to redirect a read transaction from a first DIMM in one mirror that has a sensed temperature that meets or exceeds a predetermined threshold, to a corresponding second DIMM in the other mirror; and
the memory controller disabling the redirection of the read transaction from the first DIMM when the sensed temperature of the first DIMM decreases below the predetermined threshold.
4. A system comprising:
a CPU to generate read and write transactions;
a logic to receive write and read transactions from the CPU; and
the logic to redirect a read transaction from a first DIMM in one mirror that has a sensed temperature that meets or exceeds a predetermined threshold, to a corresponding second DIMM in the other mirror; and
the logic disabling the redirection of the read transaction from the first DIMM when the sensed temperature of the first DIMM decreases below the predetermined threshold.