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Date:      Wed, 25 Mar 2026 22:51:20 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 294053] timerfd: poor periodic timer performance
Message-ID:  <bug-294053-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294053

            Bug ID: 294053
           Summary: timerfd: poor periodic timer performance
           Product: Base System
           Version: 16.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: jfree@freebsd.org

The current timerfd implementation fails to pass the
timerfd__periodic_timer_performance test, which expects 400000000 individual
nanosecond timeouts.

https://ci.freebsd.org/job/FreeBSD-main-amd64-test/28085/testReport/sys.kern/timerfd/timerfd__periodic_timer_performance/

Callout rescheduling for nanosecond intervals needs to be optimized.

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