Systems and methods of state migration in a multi-core system
The present application is directed towards systems and methods of state migration in a multi-core system. An external process on a client or server may initiate a plurality of connections with the multi-core system, such that some cores have a plurality of connections and others have none. The present invention provides systems and methods for redirecting a connection or migrating the state of a connection from being associated with a first core with a plurality of connections to a second core with no connections.
1. A method for using a surplus connection of a first core as a connection to a second core in a multi-core system, the method comprising:
a) identifying, by a process, as a surplus connection to a first core of a multi-core system, a first connection of a plurality of connections established by the first core with the process;
b) sending, by the process via one of the plurality of connections and in response to determining that the process does not have a connection to a second core of the multi-core system, a request to the first core for data from the second core;
c) sending, by the first core to the second core, a message comprising information about the surplus connection;
d) establishing, by the second core, a clone of the surplus connection, the second core sending a request to the first core to create a rule to direct packets received by the first core for the surplus connection to the second core; and
e) sending, by the second core, a second message to the process indicating that the surplus connection is established on the second core.
2. The method of claim 1 , wherein step (a) further comprises sending, by the process, a plurality of requests to the multi-core system to establish a connection.
3. The method of claim 2 , further comprising distributing, by a flow distributor of the multi-core system, each of the plurality of requests to a core based on a hash of a tuple of information from the request.
4. The method of claim 2 , further comprises sending, by the process, the plurality of requests until a threshold of requests is reached.
5. The method of claim 2 , further comprises sending, by the process, the plurality of requests until a connection with each core of the multi-core system is established.
6. The method of claim 1 , wherein step (a) further comprises receiving a core identifier, by the process, from each core of the multi-core system that established one of the plurality of connections with the process.
7. The method of claim 1 , wherein step (a) further comprises receiving, by the process, a number of cores from a core of the multi-core system that established one of the plurality of connections with the process.
8. The method of claim 1 , further comprising identifying for the rule a tuple for the connection.
9. The method of claim 1 , wherein step (a) further comprises selecting the first connection from a list of surplus connections.
10. A system for using a surplus connection of a first core as a connection to a second core in a multi-core system, the system comprising:
a multi-core device comprising a first core having a plurality of connections to a device;
a process of the device identifying as a surplus connection to the first core a first connection of the plurality of connections and sending via one of the plurality of connections and in response to determining that the process does not have a connection to a second core of the multi-core system, a request to the first core for data from the second core;
wherein the first core sends to the second core a message comprising information about the surplus connection;
wherein the second core establishes a clone of the surplus connection, sends a request to the first core to create a rule to direct packets received by the first core for the surplus connection to the second core, and sends a second message to the process indicating that the surplus connection is established on the second core.
11. The system of claim 10 , wherein the process sends a plurality of requests to the multi-core system to establish a connection.
12. The system of claim 11 , wherein a flow distributor of the multi-core system distributes each of the plurality of requests to a core based on a hash of a tuple of information from the request.
13. The system of claim 11 , wherein the process sends the plurality of requests until a threshold of requests is reached.
14. The system of claim 11 , wherein the process sends the plurality of requests until a connection with each core of the multi-core system is established.
15. The system of claim 10 , wherein the process receives a core identifier from each core of the multi-core system that established one of the plurality of connections with the process.
16. The system of claim 11 , wherein the process receives a number of cores from a core of the multi-core system that established one of the plurality of connections with the process.
17. The system of claim 10 , wherein the rule identifies a tuple for the connection.
18. The system of claim 10 , wherein step (a) further comprises selecting the first connection from a list of surplus connections.