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futexes2.meta
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title: System-Wide Shared Futex Contention name: futexes2.stp version: 1.0 author: jistone keywords: syscall locking futex subsystem: locking status: production exit: user-controlled output: sorted-list on-exit scope: system-wide description: The script watches just shared futex syscalls on the system. On exit the futex's key, the number of contentions, and the average time for each contention on the futex are printed from lowest pid number to highest. test_support: stap -l 'kernel.function("futex_wait_setup")' test_check: stap -p4 futexes2.stp test_installcheck: stap futexes2.stp -T 1