table of contents
- bookworm 6.1.106-3
- bookworm-backports 6.10.11-1~bpo12+1
- testing 6.10.11-1
- unstable 6.11.2-1
- experimental 6.11-1~exp1
PERF-LOCK(1) | perf Manual | PERF-LOCK(1) |
NAME¶
perf-lock - Analyze lock events
SYNOPSIS¶
perf lock {record|report|script|info|contention}
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.
'perf lock contention' shows contention statistics.
COMMON OPTIONS¶
-i, --input=<file>
--output=<file>
-v, --verbose
-q, --quiet
-D, --dump-raw-trace
-f, --force
--vmlinux=<file>
--kallsyms=<file>
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
-t, --threads
$ 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
-E, --entries=<value>
INFO OPTIONS¶
-t, --threads
-m, --map
CONTENTION OPTIONS¶
-k, --key=<value>
-F, --field=<value>
-t, --threads
-b, --use-bpf
-a, --all-cpus
-C, --cpu=<value>
-p, --pid=<value>
--tid=<value>
-M, --map-nr-entries=<value>
--max-stack=<value>
--stack-skip=<value>
-E, --entries=<value>
-l, --lock-addr
-o, --lock-owner
-Y, --type-filter=<value>
Note that RW-variant of locks have :R and :W suffix. Names without the suffix are shortcuts for the both variants. Ex) rwsem = rwsem:R + rwsem:W.
-L, --lock-filter=<value>
-S, --callstack-filter=<value>
-x, --field-separator=<SEP>
--lock-cgroup
-G, --cgroup-filter=<value>
SEE ALSO¶
2024-09-19 | perf |