Biasing active-standby determination
First Claim
1. A method comprising:
- upon the occurrence of an event that causes a race between a first domain in a computing system and a second domain in the computing system to start operating in a first mode, determining that the first computing domain did not operate in the first mode prior to occurrence of the event; and
upon determining that the first computing domain did not operate in the first mode prior to the occurrence of the event;
refraining, for a period of time, the first computing domain from attempting to start operating in the first mode;
allowing, during the period of time, the second computing domain to attempt to start operating in the first mode; and
after the period of time has passed;
determining, by the first computing domain, whether the second computing domain is operating in the first mode;
upon determining that the second computing domain is not operating in the first mode, allowing the first computing domain to attempt to operate in the first mode; and
upon determining that the second computing domain is operating in the first mode, causing the first computing domain to operate in a second mode different from the first mode.
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Accused Products
Abstract
In computing systems that provide multiple computing domains configured to operate according to an active-standby model, techniques are provided for intentionally biasing the race to gain mastership between competing computing domains, which determines which computing domain operates in the active mode, in favor of a particular computer domain. The race to gain mastership may be biased in favor of a computing domain operating in a particular mode prior to the occurrence of the event that triggered the race to gain mastership. For example, in certain embodiments, the race to mastership may be biased in favor of the computing domain that was operating in the active mode prior to the occurrence of an event that triggered the race to gain mastership.
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Citations
21 Claims
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1. A method comprising:
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upon the occurrence of an event that causes a race between a first domain in a computing system and a second domain in the computing system to start operating in a first mode, determining that the first computing domain did not operate in the first mode prior to occurrence of the event; and upon determining that the first computing domain did not operate in the first mode prior to the occurrence of the event; refraining, for a period of time, the first computing domain from attempting to start operating in the first mode; allowing, during the period of time, the second computing domain to attempt to start operating in the first mode; and after the period of time has passed; determining, by the first computing domain, whether the second computing domain is operating in the first mode; upon determining that the second computing domain is not operating in the first mode, allowing the first computing domain to attempt to operate in the first mode; and upon determining that the second computing domain is operating in the first mode, causing the first computing domain to operate in a second mode different from the first mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
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a first computing domain comprising at least a first processing unit, wherein the first processing unit is a processor or a processing core; and a second computing domain comprising at least a second processing wherein the second processing unit is a processor or a processing core; wherein the first computing domain is configured to; upon the occurrence of an event that causes a race between the first computing domain and the second computing domain to operate in a first mode, determine that the first computing domain did not operate in the first mode prior to occurrence of the event; refrain from attempting to start operating in the first mode for a period of time; after the period of time has passed; determine whether the second computing domain is operating in the first mode; upon determining that the second computing domain is not operating in the first mode, attempt to operate in the first mode; and upon determining that the second computing domain is operating in the first mode, start to operate in a second mode different from the first mode; and wherein the second computing domain is configured to, while the first computing domain is refrained from attempting to start operating in the first mode for the period of time, attempt to start operating in the first mode. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A network device comprising:
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a set of one or more ports for forwarding one or more data packets from the network device; a plurality of processing units; a first computing domain, the first computing domain being allocated a first set of one or more processing units from the plurality of processing units; a second computing domain, the second computing domain being allocated a second set of one or more processing units from the plurality of processing units; wherein, in response to the occurrence of an event that causes a race between the first computing domain and the second computing domain to operate in a first mode, the first computing domain is configured to determine that the first computing domain did not operate in the first mode prior to the occurrence of the event; wherein the first computing domain is configured to refrain from attempting to start operating in the first mode for a period of time; wherein, in response to the occurrence of the event, the second computing domain is configured to attempt to start operating in the first mode during the period of time; wherein, after the period of time has passed, the first computing domain is configured to; if the second computing domain is operating in the first mode, start to operate in a second mode different from the first mode; and if the second computing domain is not operating in the first mode, attempt to operate in the first mode. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An apparatus comprising:
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upon the occurrence of an event that causes a race between a first domain in a computing system and a second domain the computing system to operate in a first mode, means for determining that the first computing domain did not operate in the first mode prior to the occurrence of the event; means for refraining, by the first computing domain, for a period of time, from attempting to start operating in the first mode; and means for allowing, during the period of time, the second computing domain to attempt to start operating in the first mode; and after the period of time has passed; means for determining, by the first computing domain, whether the second computing domain is operating in the first mode; upon determining that the second computing domain is not operating in the first mode, means for allowing the first computing domain to attempt to operate in the first mode; and upon determining that the second computing domain is operating in the first mode, means for causing the first computing domain to operate in a second mode different from the first mode.
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Specification