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  1. JDK
  2. JDK-8237375

SimpleThresholdPolicy misses CounterDecay timestamp initialization

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      Description

        Invocation counters always decay at the first safepoint regardless of CounterDecayMinIntervalLength when using SimpleThresholdPolicy (-XX:-TieredCompilation).
        This leads to warmup issues (e.g. observed in compiler/c2/Test8004741.java). Some methods don't get compiled as early as expected after the first safepoint.

        Reason:
        SimpleThresholdPolicy uses a dedicated class CounterDecay which contains a static timestamp. The timestamp is initialized to 0 and is_decay_needed() compares it to the current time.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8239078 SimpleThresholdPolicy misses CounterDecay timestamp initialization

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8239238 SimpleThresholdPolicy misses CounterDecay timestamp initialization

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8239465 SimpleThresholdPolicy misses CounterDecay timestamp initialization

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8239935 SimpleThresholdPolicy misses CounterDecay timestamp initialization

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8239466 Loss of precision in counter decay calculation in 11u backport of JDK-8237375

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

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                mdoerr Martin Doerr
                mdoerr Martin Doerr
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                  Updated:
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