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  1. JDK
  2. JDK-6869327

Add new C2 flag to keep safepoints in counted loops.

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    • b103
    • sparc
    • solaris_10

    Backports

      Description

        Currently C2 removes safepoints in counted loops. It creates problem described, for example, in JDK-5014723. Add new C2 product flag UseCountedLoopSafepoints to keep safepoints in counted loops. Its default value will be false.

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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-8144827 Add new C2 flag to keep safepoints in counted loops.

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8149235 Add new C2 flag to keep safepoints in counted loops.

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8155331 Add new C2 flag to keep safepoints in counted loops.

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8180964 Add new C2 flag to keep safepoints in counted loops.

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8174075 Random performance dropouts during parallel execution

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8177693 Java VM freezes with very simple program

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8146096 [TEST BUG] compiler/loopopts/UseCountedLoopSafepoints.java Timeouts

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-5014723 implement "strip mining" loop optimization

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8144935 C2: safepoint is pruned from a non-counted loop

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8161147 jvm crashes when -XX:+UseCountedLoopSafepoints is enabled

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

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                aeriksso Andreas Eriksson (Inactive)
                kvn Vladimir Kozlov
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                  Updated:
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