US 10,482,015 B2 · Ownership tracking updates across multiple simultaneous operations

Abstract

Embodiments of the present invention are directed to a computer-implemented method for ownership tracking updates across multiple simultaneous operations. A non-limiting example of the computer-implemented method includes receiving, by a cache directory control circuit, a message to update a cache directory entry. The method further includes, in response, updating, by the cache directory control circuit, the cache directory entry, and generating a reverse compare signal including an updated ownership vector of a memory line corresponding to the cache directory entry. The method further includes sending the reverse compare signal to a cache controller associated with the cache directory entry.

Claims11

Dependent claims

A multiprocessor system comprising:

a cache directory control circuit coupled with a plurality of processing nodes, each processing node comprising:
a cache controller;
and
a processor coupled with the cache controller;
and
the cache directory control circuit configured to:
receive a message to update a cache directory entry;
and
in response to the message:
identify a first ownership vector of a memory line corresponding to the cache directory entry, the first ownership vector indicating one or more processing nodes that are associated with the cache directory entry;
update the cache directory entry;
generate a reverse compare signal comprising an updated ownership vector of the memory line corresponding to the cache directory entry, and an address of said memory line;
and
send the reverse compare signal to each processing node that was associated with the cache directory entry, according to the first ownership vector, prior to the cache directory entry being updated.

11 more elements

Dependencies are inferred from the claim text.

Ownership tracking updates across multiple simultaneous operations

Life of this patent

Ownership tracking updates across multiple simultaneous operations

Life of this patent

Abstract

Claims11