Symbol rotation of cache line codewords for increased reliability with metadata

A computer-implemented method, comprising:

• receiving a request for data of a cache line;
• responsive to the request for data, accessing metadata of the cache line by:
• accessing a plurality of codewords, each codeword of the plurality codewords comprising a plurality of symbols, the plurality of symbols comprising (1) at least one message symbol comprising message bits and (2) at least one parity symbol comprising parity bits;
• decoding at least one metadata symbol from the plurality of codewords based on a location of the at least one parity symbol in a corresponding rotation of the plurality of symbols of each codeword of the plurality of codewords;
• and
• determining the metadata of the cache line from the at least one metadata symbol of each codeword of the plurality of codewords;
• and
• based at least on the metadata of the cache line, transmitting the data of the cache line.

The computer-implemented method of 10, further comprising:

• accessing the data of the cache line by:
• accessing a message symbol of each codeword of the plurality of codewords in each corresponding rotation of the plurality of symbols in each codeword;
• and
• determining the data of the cache line from the message bits of each message symbol of each codeword of the plurality of codewords.

One or more computer storage media having computer-executable instructions embodied thereon that, when executed by a computing system having at least one processor and at least one memory, cause the at least one processor to perform operations comprising:

• receiving a request for data of a cache line;
• responsive to the request for the data of the cache line, accessing the data of the cache line by:
• accessing a plurality of codewords, each codeword of the plurality codewords comprising a plurality of symbols, the plurality of symbols comprising (1) at least one message symbol comprising message bits and (2) at least one parity symbol comprising parity bits;
• accessing a message symbol of each codeword of the plurality of codewords in a corresponding rotation of the plurality of symbols of each codeword;
• and
• determining the data of the cache line from the at least one message symbol and the at least one parity symbol of each codeword of the plurality of codewords of each cache line;
• and
• transmitting the data of the cache line.