Run-time-instrumentation controls emit instruction
AssigneeInternational Business Machines Corporation
InventorsCharles W. Gainey, Jr., Marcel Mitran, Chung-Lung K. Shum, Kevin A. Stoodley
Life of this patent
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Abstract
Aspects of the invention relate to executing a run-time-instrumentation EMIT (RIEMIT) instruction. A processor is configured to capture the run-time-instrumentation information of a stream of instructions. The RIEMIT instruction is fetched and executed. It is determined if the current run-time-instrumentation controls are configured to permit capturing and storing of run-time-instrumentation information in a run-time-instrumentation program buffer. If the controls are configured to store run-time-instrumentation instructions, then a RIEMIT instruction specified value is stored as an emit record of a reporting group in the run-time-instrumentation program buffer.
Claims14
A computer program product for executing a run-time-instrumentation controls emit (RIEMIT) instruction, the RIEMIT instruction executable in either a supervisor state or a lesser-privileged state, the computer program product comprising:
- a non-transitory tangible storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for performing a method comprising:
- configuring a processor to capture run-time-instrumentation information of a stream of instructions in a computer program, the configuring including accessing program status word (PSW) associated with the computer program to update a bit in the PSW to indicate that run-time instrumentation data should be captured by the processor, the stream of instructions comprising the RIEMIT instruction, and the computer program is one of a plurality of computer programs for execution by the processor each having an associated PSW;
- fetching the RIEMIT instruction;
- executing, by the processor, the RIEMIT instruction, the executing comprising:
- determining that current run-time-instrumentation controls are configured to permit capturing of run-time-instrumentation information for storing run-time-instrumentation records in a run-time-instrumentation program buffer;
- and
- storing an RIEMIT instruction specified value as an emit record of a reporting group in the run-time-instrumentation program buffer.
A computer system for executing a run-time-instrumentation controls emit (RIEMIT) instruction, the RIEMIT instruction executable in either a supervisor state or a lesser-privileged state, the system comprising:
- a memory;
- and
- a computer processor comprising a run-time-instrumentation module, the run-time-instrumentation module configured to perform a method comprising:
- configuring the computer processor to capture run-time-instrumentation information of a stream of instructions in a computer program, the configuring including accessing a program status word (PSW) associated with the computer program to update a bit in the PSW to indicate that run-time instrumentation data should be captured by the computer processor, the stream of instructions comprising the RIEMIT instruction, and the computer program is one of a plurality of computer programs for execution by the processor each having an associated PSW;
- fetching the RIEMIT instruction;
- executing the RIEMIT instruction, the executing comprising:
- determining current run-time-instrumentation controls are configured to permit capturing of run-time-instrumentation information for storing run-time-instrumentation records in a run-time-instrumentation program buffer;
- and
- storing an RIEMIT instruction specified value as an emit record of a reporting group in the run-time-instrumentation program buffer.
Dependencies are inferred from the claim text.