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- testing 5.18.14-1
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PERF-LOCK(1) | perf Manual | PERF-LOCK(1) |
NAME¶
perf-lock - Analyze lock events
SYNOPSIS¶
perf lock {record|report|script|info}
DESCRIPTION¶
You can analyze various lock behaviours and statistics with this perf lock command.
'perf lock record <command>' records lock events between start and end <command>. And this command produces the file "perf.data" which contains tracing results of lock events.
'perf lock report' reports statistical data.
'perf lock script' shows raw lock events.
'perf lock info' shows metadata like threads or addresses of lock instances.
COMMON OPTIONS¶
-i, --input=<file>
Input file name. (default: perf.data unless stdin is a
fifo)
-v, --verbose
Be more verbose (show symbol address, etc).
-D, --dump-raw-trace
Dump raw trace in ASCII.
-f, --force
Don’t complain, do it.
REPORT OPTIONS¶
-k, --key=<value>
Sorting key. Possible values: acquired (default), contended, avg_wait, wait_total, wait_max, wait_min.
-F, --field=<value>
Output fields. By default it shows all the fields but users can customize that using this. Possible values: acquired, contended, avg_wait, wait_total, wait_max, wait_min.
-c, --combine-locks
Merge lock instances in the same class (based on
name).
-t, --threads
The -t option is to show per-thread lock stat like below:
$ perf lock report -t -F acquired,contended,avg_wait
Name acquired contended avg wait (ns)
perf 240569 9 5784
swapper 106610 19 543
:15789 17370 2 14538
ContainerMgr 8981 6 874
sleep 5275 1 11281 ContainerThread 4416 4 944 RootPressureThr 3215 5 1215
rcu_preempt 2954 0 0
ContainerMgr 2560 0 0
unnamed 1873 0 0 EventManager_De 1845 1 636 futex-default-S 1609 0 0
INFO OPTIONS¶
-t, --threads
dump thread list in perf.data
-m, --map
dump map of lock instances (address:name table)
SEE ALSO¶
2022-08-02 | perf |