Performance monitoring for storage system with core thread comprising internal and external schedulers

A method comprising:

• monitoring performance of a first thread of a first application executing on one of a plurality of processing cores of a storage system;
• the first thread comprising an internal scheduler configured to control switching between a plurality of sub-threads of the first thread, and an external scheduler configured to control release of the processing core by the first thread for use by at least a second thread of a second application different than the first application;
• in conjunction with monitoring the performance of the first thread in executing the first application, maintaining a cumulative suspend time of the first thread over multiple suspensions of the first thread, one or more of the multiple suspensions allowing at least the second thread of the second application to execute on the processing core;
• and
• generating performance measurements for respective ones of the sub-threads of the first thread based at least in part on the cumulative suspend time of the first thread.

A computer program product comprising a non-transitory processor-readable storage medium having stored therein program code of one or more software programs, wherein the program code when executed by at least one processing device comprising a processor coupled to a memory, causes said at least one processing device:

• to monitor performance of a first thread of a first application executing on one of a plurality of processing cores of a storage system;
• the first thread comprising an internal scheduler configured to control switching between a plurality of sub-threads of the first thread, and an external scheduler configured to control release of the processing core by the first thread for use by at least a second thread of a second application different than the first application;
• in conjunction with monitoring the performance of the first thread in executing the first application, to maintain a cumulative suspend time of the first thread over multiple suspensions of the first thread, one or more of the multiple suspensions allowing at least the second thread of the second application to execute on the processing core;
• and
• to generate performance measurements for respective ones of the sub-threads of the first thread based at least in part on the cumulative suspend time of the first thread.