US 2019/0057032 A1 · Cache Coherence Management Method and Node Controller

Abstract

A cache coherence management method, a node controller, and a multiprocessor system that includes a first table, a second table, a node controller, and at least two nodes, where the node controller determines, in the first table according to address information of data, a first entry, where the first entry includes a first field and a second field. The first field records an occupation status of the data, the second field indicates a node that occupies the data exclusively when the first field includes an exclusive state, and the node controller determines a second entry in the second table according to the address information of the data and the second field when the first field includes a shared state, where the second entry includes a third field, and the third field indicates nodes that share the data.

Claims20

Dependent claims

A cache coherence management method performed by a node controller, the method being applied to a multiprocessor system, and the method comprising:

determining, in a first table according to address information of data, a first entry corresponding to the address information, the first entry comprising a first field and a second field, the first field recording an occupation status of the data, and the multiprocessor system comprising the first table, a second table, the node controller, and at least two nodes;
determining a node occupying the data according to the second field when the first field comprises an exclusive state, the second field indicating the node occupying the data exclusively when the first field comprises the exclusive state;
and
determining a second entry in the second table according to the address information of the data and the second field when the first field comprises a shared state, the second entry comprising a third field, and the third field indicating a node that shares the data.

1 more element

A node controller, applied to a multiprocessor system, comprising:

a memory configured to store program instructions;
and
a processor coupled to the memory, the program instructions causing the processor to be configured to:
determine, in a first table according to address information of data, a first entry corresponding to the address information, the first entry comprising a first field and a second field, the first field recording an occupation status of the data, and the multiprocessor system comprising the first table, a second table, and at least two nodes;
determine a node occupying the data according to the second field when the first field comprises an exclusive state, the second field indicating the node occupying the data exclusively when the first field comprises the exclusive state;
and
determine a second entry in the second table according to the address information of the data and the second field when the first field comprises a shared state, the second entry comprising a third field, and the third field indicating a node that shares the data.

4 more elements

A multiprocessor system, comprising:

a node controller;
a first table;
a second table;
and
at least two nodes, each node of the at least two nodes comprising at least one processor, and the first table, the second table, and the at least two nodes being coupled to the node controller, and
the node controller being configured to:
determine, in the first table according to address information of data, a first entry corresponding to the address information, the first entry comprising a first field and a second field, the first field recording an occupation status of the data;
determine a node occupying the data according to the second field when the first field comprises an exclusive state, the second field indicating the node occupying the data exclusively when the first field comprises the exclusive state;
and
determine a second entry in the second table according to the address information of the data and the second field when the first field comprises a shared state, the second entry comprising a third field, and the third field indicating a node that shares the data.

7 more elements

Dependencies are inferred from the claim text.

Cache Coherence Management Method and Node Controller

Life of this patent

Cache Coherence Management Method and Node Controller

Life of this patent

Abstract

Claims20