Excluding counts on software threads in a state

Abstract

The present disclosure provides a method, computer program product, and system for compensating for event counts for a thread occurring during targeted states on the thread. In example embodiments, the state is a spin loop state and instructions completed during the spin loop are eliminated from a performance report and are presented in the absence of the spin loop. In another embodiment, the event counts are interrupt counts eliminated during the spin loop.

Wwhat is claimed is: 
     
         1 . A method for factoring out event counts for a routine in a thread state targeted for elimination of event counts comprising:
 accumulating events counts as a per thread base time; and   attributing the per thread base time to a routine executing instructions on a thread to form an accumulated per thread base time for the routine wherein the accumulated per thread base time is only for executing instructions by the routine outside of a thread state targeted for elimination of event counts.   
     
     
         2 . The method of  claim 1 , wherein the thread state is a software spin loop. 
     
     
         3 . The method of  claim 1 , wherein the routine is selected from a group consisting of a method, a subroutine, a procedure, a function, and an instrumented segment. 
     
     
         4 . The method of  claim 1 , wherein the thread state is a failure to acquire a resource state for the thread and the event counts are instructions completed. 
     
     
         5 . The method of  claim 1 , wherein the event counts are counted by a performance monitoring unit on a processor executing instructions on the thread. 
     
     
         6 . The method of  claim 1 , wherein the thread state is spinning and the event counts are interrupt counts for the thread. 
     
     
         7 . The method of  claim 1 , further comprising:
 responsive to detecting an entering of the thread state, preventing accumulation of the event counts on the thread; and   responsive to detecting an exit from the thread state, permitting accumulation of the event counts on the thread.   
     
     
         8 . The method of  claim 1 , further comprising:
 producing a report excluding the event counts during the state on the thread and including the event counts in the report for a different thread.   
     
     
         9 . A computer program product stored in a non-transitory computer readable medium, comprising computer instructions that when executed by an information handling system, causes the information handling system to factoring out event counts for a routine in a thread state targeted for elimination of event counts to perform actions comprising:
 accumulating events counts as a per thread base time; and   attributing the per thread base time to a routine executing instructions on a thread to form an accumulated per thread base time for the routine wherein the accumulated per thread base time is only for executing instructions by the routine outside of a thread state targeted for elimination of event counts.   
     
     
         10 . The computer program product of  claim 9 , wherein the thread state is a software spin loop. 
     
     
         11 . The computer program product of  claim 9 , wherein the routine is selected from a group consisting of a method, a subroutine, a procedure, a function, and an instrumented segment. 
     
     
         12 . The computer program product of  claim 9 , wherein the thread state is a failure to acquire a resource state for the thread and the event counts are instructions completed. 
     
     
         13 . The computer program product of  claim 9 , wherein the event counts are counted by a performance monitoring unit on a processor executing instructions on the thread. 
     
     
         14 . A system for factoring out event counts occurring on a thread during a state targeted for compensation comprising:
 a processor;   a memory connected to the processor;   an application executing on the processor; and   wherein the system:   accumulates event counts a per thread base time; and   attributes the per thread base time to a routine executing instructions on a thread to form an accumulated per thread base time for the routine wherein the accumulated per thread base time is only for executing instructions by the routine outside of a thread state targeted for elimination of event counts.   
     
     
         15 . The system according to  claim 14 , wherein the thread state is a software spin loop. 
     
     
         16 . The system according to  claim 14 , wherein the routine is selected from a group consisting of a method, a subroutine, a procedure, a function, and an instrumented segment. 
     
     
         17 . The system according to  claim 14 , wherein the thread state is a failure to acquire a resource state for the thread and the event counts are instructions completed. 
     
     
         18 . The system according to  claim 14 , wherein the event counts are counted by a performance monitoring unit on a processor executing instructions on the thread. 
     
     
         19 . The system according to  claims 14 , wherein the thread state is spinning and the event counts are interrupt counts for the thread. 
     
     
         20 . The system according to  claims 14 ,
 responsive to detecting an entering of the thread state, preventing accumulation of the event counts on the thread; and   responsive to detecting an exit from the thread state, permitting accumulation of the event counts on the thread.