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

       perf(1)