Multi-level polling techniques

A non-transitory computer readable medium comprising code stored thereon that, when executed, performs a method comprising:

• receiving a plurality of I/O operations at a system;
• servicing the plurality of I/O operations, wherein said servicing the plurality of I/O operations causes a plurality of events in connection with a plurality of hardware components;
• and
• polling a plurality of event queues associated with the plurality of hardware components, wherein each of the plurality of event queues indicates outstanding events of a corresponding one of the plurality of hardware components, wherein said polling includes:
• performing a first level polling cycle or interval, including calling a first plurality of first level pollers, wherein each of the first level pollers of the first plurality polls a corresponding one of the plurality of event queues to determine whether said corresponding one event queue has any outstanding events;
• and
• responsive to completing the first level polling cycle or interval, performing a second level polling cycle or interval, including calling a first set of one or more of a second plurality of second level pollers based on one or more conditions.

A system comprising:

• one or more processors;
• and
• a memory comprising code stored thereon that, when executed, performs a method comprising:
• receiving a plurality of I/O operations at a system;
• servicing the plurality of I/O operations, wherein said servicing the plurality of I/O operations causes a plurality of events in connection with a plurality of hardware components;
• and
• polling a plurality of event queues associated with the plurality of hardware components, wherein each of the plurality of event queues indicates outstanding events of a corresponding one of the plurality of hardware components, wherein said polling includes:
• performing a first level polling cycle or interval, including calling a first plurality of first level pollers, wherein each of the first level pollers of the first plurality polls a corresponding one of the plurality of event queues to determine whether said corresponding one event queue has any outstanding events;
• and
• responsive to completing the first level polling cycle or interval, performing a second level polling cycle or interval, including calling a first set of one or more of a second plurality of second level pollers based on one or more conditions.