Messages in this thread | | | From | Petar Gligoric <> | Subject | [PATCH 0/2] perf: introduce perf based task analyzer | Date | Thu, 1 Dec 2022 14:35:55 -0500 |
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This patch-series introduces the task analyzer and adds the feature to output csv files for further analysis in thirds party script (e.g. pandas and friends).
The task analyzer dissects recorded perf.data files based on sched:sched_switch events. It outputs useful information for the user of each task, like times between schedule in/schedule out of the same task.
Switched-In Switched-Out CPU PID TID Comm Runtime Time Out-In 15576.658891407 15576.659156086 4 2412 2428 gdbus 265 1949 15576.659111320 15576.659455410 0 2412 2412 gnome-shell 344 2267 15576.659491326 15576.659506173 2 74 74 kworker/2:1 15 13145 [...]
The user can modify the output to his liking and his necessity. He can either limit the output to tasks he wants or filter tasks he does not present in the output. The output can also be limited via the time or specific tasks can be highlight via colors. A combination of those options is also possible. Additionally the user can print out a summary of all tasks, which is a table of information from all tasks throughout the whole trace. Information, like total runtime, how many times the tasks have been scheduled in, what the max runtime was and when it occurred, just to name few.
Summary Task Information Runtime Information PID TID Comm Runs Accumulated Mean Median Min Max Max At 14 14 ksoftirqd/0 13 334 26 15 9 127 15571.621211956 15 15 rcu_preempt 133 1778 13 13 2 33 15572.581176024 16 16 migration/0 3 49 16 13 12 24 15571.608915425 [...]
The standard task as well as the summary can be printed in either nanoseconds, milliseconds or microseconds(standard). Both standard as well as summary can be saved in a user specified file in csv format.
Hagen Paul Pfeifer (1): perf script: introduce task analyzer
Petar Gligoric (1): perf script: task-analyzer add csv support
.../scripts/python/bin/tasks-analyzer-record | 2 + .../scripts/python/bin/tasks-analyzer-report | 3 + tools/perf/scripts/python/tasks-analyzer.py | 937 ++++++++++++++++++ 3 files changed, 942 insertions(+) create mode 100755 tools/perf/scripts/python/bin/tasks-analyzer-record create mode 100755 tools/perf/scripts/python/bin/tasks-analyzer-report create mode 100755 tools/perf/scripts/python/tasks-analyzer.py
-- 2.30.2
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