Patent ID: 11971821
Assignee: SHANGHAI ZHAOXIN SEMICONDUCTOR CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 25:
26. The method as claimed in claim 23, further comprising:
corresponding to each matched cache line in the first last-level cache, operating the first last-level cache to provide one snoop request to be passed to the first in-core cache module through a first snoop filter of the first processor;
wherein:
each snoop request carries a tag to represent the corresponding matched cache line, and the tag further tags associated cached contents in the other levels of the hierarchical cache structure;
in response to each snoop request, the first in-core cache module searches itself to determine which cache lines within the first in-core cache module match the tag carried on the snoop request, wherein: if a matched cache line has been modified, the first in-core cache module writes back the matched cache line to the system memory; and, whether modified or not, all matched cache lines within the first in-core cache module are invalidated.