Abstract: Embodiments include a method and system of dynamically allocatable memory error mitigation. In one embodiment, a system applies an error mitigation mechanism to one of multiple groups of memory units, wherein the one group is in active use during an error test of a second group of memory units. The system deactivates and tests the second group of memory units for errors. In response to detecting an error in a memory unit of the second group, the system applies, to the memory unit of the second group having the error, the error mitigation mechanism for active use. The system then activates the second group of memory units with the error mitigation mechanism applied to the memory unit of the second group having the error.

Abstract: An electronic device may include a power delivery system to provide a voltage, and an integrated circuit having a processor to receive the voltage. When the received voltage exceeds a prescribed value, the integrated circuit to perform an act to consume current from the power delivery system.

Abstract: Embodiments of apparatus, methods, systems, and devices are described herein for selective error correction in memory with multiple operation modes. In various embodiments, an error correction block (e.g., of a memory controller) may be configured to perform error correction on data read from a first portion of a memory based on a corresponding error correction code read from a second portion of the memory, and to calculate and store the error correction code. A control block coupled to the error correction block may be configured to selectively enable/disable the error correction block to perform the error correction, and to calculate and store the error correction code, based at least in part on a current operation mode of the memory.

Abstract: A method for operating a cache that includes both robust cells and standard cells may include receiving a data to be written to the cache, determining whether a type of the data is unmodified data or modified data, and writing the data to robust cells or standard cells as a function of the type of the data. A processor includes a core that includes a cache including both robust cells and standard cells for receiving data, wherein the data is written to robust cells or standard cells as a function of whether a type of the data is determined to be unmodified data or modified data.

Abstract: Sequential circuits with error-detection are provided. They may, for example, be used to replace traditional master-slave flip-flops, e.g., in critical path circuits to detect and initiate correction of late transitions at the input of the sequential. In some embodiments, such sequentials may comprise a transition detector with a time borrowing latch.

Abstract: Some embodiments include a counter having a first generator to generate signals having different frequencies, and a second generator to generate counter values of the counter. Each of the counter values may be based at least in part on a number of transitions of a respective signal among the signals. Other embodiments are described.

Abstract: A cache memory system uses multi-bit Error Correcting Code (ECC) with a low storage and complexity overhead. In an embodiment, error correction logic may include a first error correction logic to determine a number of errors in data that is stored in a cache line of a cache memory, and a second error correction logic to receive the data from the first error correction logic if the number of errors is determined to be greater than one and to perform error correction responsive to receipt of the data. The cache memory system can be operated at very low idle power, without dramatically increasing transition latency to and from an idle power state due to loss of state. Other embodiments are described and claimed.

Abstract: Embodiments include a method and system of dynamically allocatable memory error mitigation. In one embodiment, a system applies an error mitigation mechanism to one of multiple groups of memory units, wherein the one group is in active use during an error test of a second group of memory units. The system deactivates and tests the second group of memory units for errors. In response to detecting an error in a memory unit of the second group, the system applies, to the memory unit of the second group having the error, the error mitigation mechanism for active use. The system then activates the second group of memory units with the error mitigation mechanism applied to the memory unit of the second group having the error.

Abstract: A method for operating a cache that includes both robust cells and standard cells may include receiving a data to be written to the cache, determining whether a type of the data is unmodified data or modified data, and writing the data to robust cells or standard cells as a function of the type of the data. A processor includes a core that includes a cache including both robust cells and standard cells for receiving data, wherein the data is written to robust cells or standard cells as a function of whether a type of the data is determined to be unmodified data or modified data.

Abstract: Various embodiments of the invention concern methods and apparatuses for power and time efficient load handling. A compiler may identify producer loads, consumer reuse loads, consumer forwarded loads, and producer/consumer hybrid loads. Based on this identification, performance of the load may be efficiently directed to a load value buffer, store buffer, data cache, or elsewhere. Consequently, accesses to cache are reduced, through direct loading from load value buffers and store buffers, thereby efficiently processing the loads.

Abstract: A cache memory system is provided that uses multi-bit Error Correcting Code (ECC) with a low storage and complexity overhead. The cache memory system can be operated at very low idle power, without dramatically increasing transition latency to and from an idle power state due to loss of state.

Abstract: Various embodiments of the invention concern methods and apparatuses for power and time efficient load handling. A compiler may identify producer loads, consumer reuse loads, consumer forwarded loads, and producer/consumer hybrid loads. Based on this identification, performance of the load may be efficiently directed to a load value buffer, store buffer, data cache, or elsewhere. Consequently, accesses to cache are reduced, through direct loading from load value buffers and store buffers, thereby efficiently processing the loads.

Abstract: Apparatus and methods for addressing predicting useful in high-performance computing systems. The present invention provides novel correlation prediction tables. In one embodiment, correlation prediction tables of the present invention contain an entered key for each successor value entered into the correlation table. In a second embodiment, correlation prediction tables of the present invention utilize address offsets for both the entered keys and entered successor values.

Abstract: System and method to reduce execution of instructions involving unreliable data in a speculative processor. A method comprises identifying scratch values generated during speculative execution of a processor, and setting at least one tag associated with at least one data area of the processor to indicate that the data area holds a scratch value. Such data areas include registers, predicates, flags, and the like. Instructions may also be similarly tagged. The method may be executed by an execution engine in a computer processor.

Abstract: An apparatus may include a first storage location to store a key value of an activated correlated data values (CDV) pair and a second storage location to store a correlated value corresponding to the key value. An apparatus may also include a first storage location to store an instruction to activate a CDV pair and a second storage location to store an instruction to deactivate the CDV pair. A system may comprise a processor to fetch and execute a native instruction set including an instruction to activate a CDV pair and an instruction to deactivate the CDV pair, as well as a memory to store a table that includes the CDV pair. A machine-readable medium may include instructions causing a machine to perform a method comprising activating a CDV pair and performing a first task using the correlated value in parallel with a second task using the key value.

Abstract: A method and apparatus are described for protecting cache lines allocated to a cache by a run-ahead prefetcher from premature eviction, preventing thrashing. The invention also prevents premature eviction of cache lines still in use, such as lines allocated by the run-ahead prefetcher but not yet referenced by normal execution. A protection bit indicates whether its associated cache line has protected status in the cache or whether it may be evicted.

Abstract: Set address correlation correlates between addresses belonging to a common address set. Addresses are grouped into address sets and correlations are created between addresses by set. The correlations are used to predict future addresses based on current addresses.

Abstract: Apparatus and methods for addressing predicting useful in high-performance computing systems. The present invention provides novel correlation prediction tables. In one embodiment, correlation prediction tables of the present invention contain an entered key for each successor value entered into the correlation table. In a second embodiment, correlation prediction tables of the present invention utilize address offsets for both the entered keys and entered successor values.

Abstract: A critical load ordering unit is responsible for receiving instructions during a critical phase. Load instructions are associated with the number of instructions during the critical phase that depend on the load instructions. The instructions may then be ordered based on their dependence counts and/or marked as critical load instructions.

Abstract: To make a branch prediction, a branch prediction apparatus determines a trigger load instruction whose value feeds into the branch instruction. A hash value is associated with the branch instruction. The branch prediction apparatus computes the hash value based on the trigger load instruction. If the hash value has not changed, the branch prediction apparatus predicts the branch to be chosen based on past predictions for the hash value.