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title: Show Reasons and Durations for Processes Sleeping name: latencytap.stp version: 1.0 author: William Cohen keywords: _best profiling subsystem: any status: experimental exit: user-controlled output: sorted-list scope: system-wide description: The latencytap.stp script collects data on the intervals processes are deactivated (sleeping). The script categorizes the reasons for the sleeps by analyzing the backtraces and displays a sorted list of the top 20 causes from largest total sum time sleeping to smallest. The output is updated every 30 seconds. The script needs to be compiled with the '--all-modules' option to produce reasons for sleeps caused by modules. Optionally, this script can be used with the '-c' or '-x' options to focus on a specific PID. test_check: stap -p4 --all-modules latencytap.stp test_installcheck: stap latencytap.stp --all-modules -T 1