Servicing interrupts and scheduling code thread execution in a multi-CPU network file server
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United States of America Patent
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May 15, 2012
Grant Date -
N/A
app pub date -
Dec 23, 2009
filing date -
Dec 23, 2009
priority date (Note) -
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Abstract
Interrupts and code threads are assigned in a particular way to the core CPUs of a network file server in order to reduce latency for processing client requests for file access. Threads of the network stack are incorporated into real time threads that are scheduled by a real-time scheduler and executed exclusively by a plurality of the core CPUs that are not interrupted by disk adapter interrupts so that the disk adapter interrupts do not interrupt execution of the network stack. Instances of a storage access driver are hard affinity threads, and soft affinity threads include a multitude of instances of a thread of the file system stack for file access request processing so that file access request processing for a multitude of concurrent file access requests is load balanced over the core CPUs.
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