Methods and apparatus for dynamically switching between polling and interrupt mode for a ring buffer of a network interface card
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United States of America Patent
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May 3, 2011
Grant Date -
N/A
app pub date -
Jul 9, 2004
filing date -
Jul 9, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and apparatus for processing packets in a computer system including an operating system and a network interface card (NIC) are disclosed. The NIC having a plurality of ring buffers is configured to operate in either a polling mode or an interrupt mode for a particular ring buffer. When the NIC is in the polling mode for a ring buffer, the NIC is periodically polled to determine whether one or more packets have been received by the ring buffer. When the NIC is in the interrupt mode, the operating system is capable of receiving an interrupt indicating that the ring buffer of the NIC has received one or more packets. The operating system is capable of instructing the NIC to change its mode from the polling mode to the interrupt mode for a particular ring buffer, and from the interrupt mode to the polling mode for a particular ring buffer.
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