Methods for reducing cache memory pollution during parity calculations of RAID data

A non-transitory computer readable storage medium including instructions that, when executed by a processing system, cause the processing system to perform a method for parity calculations, the method comprising:

• loading, by a redundant array of independent disk (RAID) stack, a first parity block of RAID data into a first memory address of a main memory of a data processing system;
• performing, by a processor of the data processing system, a first parity calculation on a first plurality of data blocks of the RAID data with the first parity block loaded from the first memory address of the main memory into a register of the processor of the data processing system and a cache memory associated with the processor;
• loading, by the RAID stack, subsequent parity blocks of RAID data into subsequent memory addresses of the main memory, wherein a difference between the first memory address and the subsequent memory addresses equals to one or more multiples of an alias offset associated with the cache memory;
• and
• performing, by the processor, subsequent parity calculations on a subsequent pluralities of data blocks and the subsequent parity blocks of the RAID data.

A system, comprising:

• a processor;
• a main memory coupled to the processor;
• and
• a redundant array of independent disk (RAID) stack executed from the main memory to cause the processor to
• load a first parity block of RAID data into a first memory address of a main memory of a data processing system,
• perform a first parity calculation on a first plurality of data blocks of the RAID data with the first parity block loaded from the first memory address of the main memory into a register of the processor of the data processing system and a cache memory associated with the processor,
• load subsequent parity blocks of RAID data into subsequent memory addresses of the main memory, wherein a difference between the first memory address and the subsequent memory addresses equals to one or more multiples of an alias offset associated with the cache memory, and
• perform subsequent parity calculations on a subsequent pluralities of data blocks and the subsequent parity blocks of the RAID data.