Network interface card rate limiting
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United States of America Patent
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May 16, 2017
Issued Date -
N/A
app pub date -
May 19, 2014
filing date -
May 19, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
Systems and methods for limiting the rate of packet transmission from a NIC to a host CPU are provided. According to one embodiment, data packets are received from a network by the NIC. The NIC is coupled to a host central processing unit (CPU) of a network appliance through a bus system. A status of the host CPU is monitored by the NIC. A rate limiting mode indicator is set by the NIC based on the status. When the rate limiting mode indicator indicates rate limiting is inactive, then the received data packets are transmitted from the NIC to the host CPU for processing. When the rate limiting mode indicator indicates rate limiting is active, then rate limiting is performing by temporarily stopping or slowing transmission of the received data packets from the NIC to the host CPU for processing.
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