Methods and apparatus for command list processing in performing parallel IO operations

A non-transitory computer readable medium storing program code for handling IO requests directed to an operating system having an IO scheduling component, the program code being executable by a processor to perform operations comprising:

• allocating a command to a thread in association with one of the IO requests, the command being allocated from one of a plurality of command lists accessible in parallel;
• linking the command to one of a plurality of active command lists that are accessible in parallel;
• returning a success indication to the thread, unlinking the command from the one of the plurality of active command lists, and freeing the command to one of the plurality of command lists following a cache hit corresponding to the one of the IO requests,
• wherein each of the active command lists respectively corresponds to one of a plurality of CPUs on a multi-core processing platform on which the IO requests are processed.

An apparatus for handling IO requests directed to an operating system having an IO scheduling component, the apparatus comprising:

• a processor;
• and
• a memory, the memory storing program code executable by the processor to perform operations comprising:
• allocating a command to a thread in association with one of the IO requests, the command being allocated from one of a plurality of command lists accessible in parallel;
• linking the command to one of a plurality of active command lists that are accessible in parallel;
• returning a success indication to the thread, unlinking the command from the one of the plurality of active command lists, and freeing the command to one of the plurality of command lists following a cache hit corresponding to the one of the IO requests,
• wherein each of the active command lists respectively corresponds to one of a plurality of CPUs on a multi-core processing platform on which the IO requests are processed.