摘要:
A system provides complex branch execution hardware and a hardware-based Multiplexer (MUX) to multiplex a fetch address of a future branch and a preloaded branch fetch address to create an index hash value that is used to index a branch target prediction table for execution by a processor core, in order to reduce branch mis-prediction by preloading.
摘要:
Mechanisms are provided for efficient storage of meta-bits within a system memory. The mechanisms combine an L/G bit and an SUE bit to form meta-bits. The mechanisms then determine the local/global state of a cache line on the first cycle of data. The mechanisms forward the data to the requesting cache, and the requesting cache may reissue the request globally based on the local/global state of the cache line. The mechanisms then determine the special uncorrectable error state of the cache line on the second or subsequent cycle of data. The mechanisms perform error processing regardless of whether the request was reissued globally.
摘要:
According to one embodiment of the present invention, a method for bank sparing in a 3D memory device that includes detecting, by a memory controller, a first error in the 3D memory device and detecting a second error in a first element in a first rank of the 3D memory device, wherein the first element in the first rank has an associated first chip select. The method also includes sending a command to the 3D memory device to set mode registers in a master logic portion of the 3D memory device that enable a second element to receive communications directed to the first element and wherein the second element is in a second rank of the 3D memory device, wherein the first element and second element are each either a bank or a bank group that comprise a plurality of chips.
摘要:
An embodiment is a method for operating a memory system, the method including storing initial calibration values for each of a first frequency and second frequency for a memory device, performing a periodic calibration to determine a calibration update value for operation of the memory device at the first frequency, combining the calibration update value with the initial calibration value for the first frequency to provide an updated calibration for operation of the memory device at an operating frequency of the first frequency and receiving a frequency change request at a memory controller associated with the memory device. The method further includes blocking traffic to the memory device, adjusting operating frequency to the second frequency while the memory device remains powered, combining the calibration update value with the initial calibration value for the second frequency for operation at the second frequency and enabling traffic to the memory device.
摘要:
A system to improve miscorrection rates in error control code may include an error control decoder with a safe decoding mode that processes at least two data packets. The system may also include a buffer to receive the processed at least two data packets from the error control decoder. The error control decoder may apply a logic OR operation to the uncorrectable error signal related to the processing of the at least two data packets to produce a global uncorrectable error signal. The system may further include a recipient to receive the at least two data packets and the global uncorrectable error signal.
摘要:
A method of correcting defects in a storage array of a microprocessor, such as a cache memory, by operating the microprocessor to carry out a functional test procedure which utilizes cache memory, collecting fault data in a trace array during the functional test procedure, identifying a location of the defect in the cache memory using the fault data, and repairing the defect by setting a fuse to reroute access requests for the location to a redundant array. The fault data may include an error syndrome and a failing address. The functional test procedure creates random cache access sequences that cause varying loads of traffic in the cache memory using a test pattern based on a random seed. The functional test procedure may be carried out after completion of a nonfunctional, built-in self test of the microprocessor which sets some of the fuses.
摘要:
According to one embodiment of the present invention, a method for bank sparing in a 3D memory device that includes detecting, by a memory controller, a first error in the 3D memory device and detecting a second error in a first element in a first rank of the 3D memory device, wherein the first element in the first rank has an associated first chip select. The method also includes sending a command to the 3D memory device to set mode registers in a master logic portion of the 3D memory device that enable a second element to receive communications directed to the first element and wherein the second element is in a second rank of the 3D memory device, wherein the first element and second element are each either a bank or a bank group that comprise a plurality of chips.
摘要:
According to one embodiment of the present invention, a method for operating a three dimensional (“3D”) memory device includes detecting, by a memory controller, a first error on the 3D memory device and detecting, by the memory controller, a second error in a first chip in a first rank of the 3D memory device, wherein the first chip has an associated first chip select. The method also includes powering up a second chip in a second rank, sending a command from the memory controller to the 3D memory device to replace the first chip in the first chip select with the second chip and correcting the first error using an error control code.
摘要:
A technique for memory command throttling in a partitioned memory subsystem includes accepting, by a master memory controller included in multiple memory controllers, a synchronization command. The synchronization command includes command data that includes an associated synchronization indication (e.g., a synchronization bit or bits) for each of the multiple memory controllers and each of the multiple memory controllers controls a respective partition of the partitioned memory subsystem. In response to receiving the synchronization command, the master memory controller forwards the synchronization command to the multiple memory controllers. In response to receiving the forwarded synchronization command each of the multiple memory controllers de-asserts an associated status bit. In response to receiving the forwarded synchronization command, each of the multiple memory controllers determines whether the associated synchronization indication is asserted. Each of the multiple memory controllers with the asserted associated synchronization indication then transmits the forwarded synchronization command to associated power control logic.
摘要:
A system to improve memory failure management may include memory, and an error control decoder to determine failures in the memory. The system may also include an agent that may monitor failures in the memory. The system may further include a table where the error control decoder may record the failures, and where the agent can read and write to.