Determining the status of run-time-instrumentation controls
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United States of America Patent
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Feb 2, 2016
Grant Date -
Sep 19, 2013
app pub date -
Mar 16, 2012
filing date -
Mar 16, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to determining the status of run-time-instrumentation controls. The status is determined by executing a test run-time-instrumentation controls (TRIC) instruction. The TRIC instruction executed in either a supervisor state or a lesser-privileged state. The TRIC instruction determines whether the run-time-instrumentation controls have changed. The run-time-instrumentation controls are set to an initial value using a privileged load run-time-instrumentation controls (LRIC) instruction. The TRIC instruction is fetched and executed. If the TRIC instruction is enabled, then it is determined if the initial value set by the run-time-instrumentation controls has been changed. If the initial value set by the run-time-instrumentation controls has been changed, then a condition code is set to a first value.
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