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  1. JDK
  2. JDK-8234146

compiler/jsr292/ContinuousCallSiteTargetChange.java times out on SPARC

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    • b15
    • sparc

    Backports

      Description

        compiler/jsr292/ContinuousCallSiteTargetChange.java occasionally times out on SPARC.

        Analysis:

        The timeouts occur when the system is under load. Then the list of dependent nmethods of the dynamic
        call site of the PingPongTest gets as long as 1500 nmethods. The list is iterated in
        DependencyContext::mark_dependent_nmethods() every time the call site target is changed. And this
        takes longer and longer as the list grows. Note that dependents are removed only when they are made
        zombie, but this doesn't happen here.

        The list of dependent nmethods is virtually empty if the system is idle, because then the target is
        changed faster than the method holding the call site gets compiled. When the jit finishes a
        compilation it discards the new nmethod, because the call site target was changed already.

        See attachment howto_reproduce_and_demo_of_potential_fix.txt

        See RFC thread http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2020-March/037349.html

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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-8241733 compiler/jsr292/ContinuousCallSiteTargetChange.java times out on SPARC

            • 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-8241790 compiler/jsr292/ContinuousCallSiteTargetChange.java times out on SPARC

            • 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-8243248 compiler/jsr292/ContinuousCallSiteTargetChange.java times out on SPARC

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8222030 PPC64: Tests failing possibly due to a bottleneck in const pool

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

            Bug - A problem which impairs or prevents the functions of the product. JDK-8242793 Incorrect copyright header in ContinuousCallSiteTargetChange.java

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

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                rrich Richard Reingruber
                thartmann Tobias Hartmann
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                  Created:
                  Updated:
                  Resolved: