Performance monitoring and enhancement

A computer processing system comprising:

• one or more processors programmed and configured to cause the execution of:
• generating one or more threads to operate a storage system, the storage system comprising one or more system resources, and each of the one or more threads associated with one of a plurality of tasks of the storage system;
• updating one or more performance counters of the storage system in response to a change in operating state of one of the one or more threads;
• generating performance snapshots by sampling a state of the tasks associated with the threads and the performance counters, any of the performance snapshots including one or more task-specific directed graphs;
• identifying one or more intervals of performance degradation of the storage system from the performance snapshots;
• and
• clustering time-series of samples from the performance snapshots to identify one or more of the plurality of tasks as a cause of any of the intervals of performance degradation.