System and method for thermal control in a chassis
AssigneeDell Products L.P.
InventorsRamsundar Govindarajan, Venkatesh Ramamoorthy, Dinesh Kunnathur Ragupathi
Life of this patent
Estimating the term…
Abstract
A method of thermal control in a chassis is presented. An example method of thermal control can include each of one or more blades reporting a requested fan blade speed to a CMC controller where the CMC controller performs an auction of the requested fan blade speed, determines a high value and assigning a corresponding active blade, and reporting the high value to the blades. The active blade then provides fan speed alerts while the passive blades provide fan speed alerts only when the new fan speed request exceeds the high value.
Claims20
A chassis management controller (CMC) in a chassis, the CMC comprising:
- a processor executing instructions for operating the CMC in one of a plurality of states, the states comprising an auction state, a stable state, or a comparison state;
- wherein:
- when the CMC is in the auction state, the CMC:
- receives a first requested fan speed from a first blade in the chassis;
- receives a second requested fan speed from a second blade in the chassis;
- determines the first requested fan speed as a highest requested fan speed when the first requested fan speed is higher than the second requested fan speed;
- reports the highest requested fan speed to the first and second blades;
- and
- transitions to the stable state;
- the CMC transitions from the stable state to the auction state when the first blade requests a third requested fan speed lower than the highest requested fan speed;
- and
- the CMC transitions from the stable state to the comparison state when the second blade requests a fourth requested fan speed higher than the highest requested fan speed.
A method of thermal control, the method comprising:
- operating a chassis management controller (CMC) of a chassis in one of a plurality of states, the states comprising an auction state, a stable state, or a comparison state;
- wherein when the CMC is in the auction state the method comprises:
- receiving, by the CMC, a first requested fan speed from a first blade in the chassis;
- receiving, by the CMC, a second requested fan speed from a second blade in the chassis;
- determining, by the CMC, the first requested fan speed as a highest requested fan speed when the first requested fan speed is higher than the second requested fan speed;
- reporting the highest requested fan speed to the first and second blades;
- and
- transitioning the CMC to the stable state;
- transitioning the CMC from the stable state to the auction state when the first blade requests a third requested fan speed lower than the highest requested fan speed;
- and
- transitioning from the stable state to the comparison state when the second blade requests a fourth requested fan speed higher than the highest requested fan speed.
Dependencies are inferred from the claim text.