Linux/tools/perf/Documentation/perf-lock.txt

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 perf-lock(1) 1 perf-lock(1) 2 ============ 2 ============ 3 3 4 NAME 4 NAME 5 ---- 5 ---- 6 perf-lock - Analyze lock events 6 perf-lock - Analyze lock events 7 7 8 SYNOPSIS 8 SYNOPSIS 9 -------- 9 -------- 10 [verse] 10 [verse] 11 'perf lock' {record|report|script|info|content !! 11 'perf lock' {record|report|script|info} 12 12 13 DESCRIPTION 13 DESCRIPTION 14 ----------- 14 ----------- 15 You can analyze various lock behaviours 15 You can analyze various lock behaviours 16 and statistics with this 'perf lock' command. 16 and statistics with this 'perf lock' command. 17 17 18 'perf lock record <command>' records lock ev 18 'perf lock record <command>' records lock events 19 between start and end <command>. And this co 19 between start and end <command>. And this command 20 produces the file "perf.data" which contains 20 produces the file "perf.data" which contains tracing 21 results of lock events. 21 results of lock events. 22 22 23 'perf lock report' reports statistical data. 23 'perf lock report' reports statistical data. 24 24 25 'perf lock script' shows raw lock events. 25 'perf lock script' shows raw lock events. 26 26 27 'perf lock info' shows metadata like threads 27 'perf lock info' shows metadata like threads or addresses 28 of lock instances. 28 of lock instances. 29 29 30 'perf lock contention' shows contention stat << 31 << 32 COMMON OPTIONS 30 COMMON OPTIONS 33 -------------- 31 -------------- 34 32 35 -i:: 33 -i:: 36 --input=<file>:: 34 --input=<file>:: 37 Input file name. (default: perf.data u 35 Input file name. (default: perf.data unless stdin is a fifo) 38 36 39 --output=<file>:: << 40 Output file name for perf lock content << 41 << 42 -v:: 37 -v:: 43 --verbose:: 38 --verbose:: 44 Be more verbose (show symbol address, 39 Be more verbose (show symbol address, etc). 45 40 46 -q:: << 47 --quiet:: << 48 Do not show any warnings or messages. << 49 << 50 -D:: 41 -D:: 51 --dump-raw-trace:: 42 --dump-raw-trace:: 52 Dump raw trace in ASCII. 43 Dump raw trace in ASCII. 53 44 54 -f:: 45 -f:: 55 --force:: 46 --force:: 56 Don't complain, do it. !! 47 Don't complan, do it. 57 << 58 --vmlinux=<file>:: << 59 vmlinux pathname << 60 << 61 --kallsyms=<file>:: << 62 kallsyms pathname << 63 << 64 48 65 REPORT OPTIONS 49 REPORT OPTIONS 66 -------------- 50 -------------- 67 51 68 -k:: 52 -k:: 69 --key=<value>:: 53 --key=<value>:: 70 Sorting key. Possible values: acquired 54 Sorting key. Possible values: acquired (default), contended, 71 avg_wait, wait_total, wait_max, wait_m 55 avg_wait, wait_total, wait_max, wait_min. 72 56 73 -F:: << 74 --field=<value>:: << 75 Output fields. By default it shows all << 76 customize that using this. Possible v << 77 avg_wait, wait_total, wait_max, wait_m << 78 << 79 -c:: << 80 --combine-locks:: << 81 Merge lock instances in the same class << 82 << 83 -t:: << 84 --threads:: << 85 The -t option is to show per-thread lock s << 86 << 87 $ perf lock report -t -F acquired,conten << 88 << 89 Name acquired contended << 90 << 91 perf 240569 9 << 92 swapper 106610 19 << 93 :15789 17370 2 << 94 ContainerMgr 8981 6 << 95 sleep 5275 1 << 96 ContainerThread 4416 4 << 97 RootPressureThr 3215 5 << 98 rcu_preempt 2954 0 << 99 ContainerMgr 2560 0 << 100 unnamed 1873 0 << 101 EventManager_De 1845 1 << 102 futex-default-S 1609 0 << 103 << 104 -E:: << 105 --entries=<value>:: << 106 Display this many entries. << 107 << 108 << 109 INFO OPTIONS 57 INFO OPTIONS 110 ------------ 58 ------------ 111 59 112 -t:: 60 -t:: 113 --threads:: 61 --threads:: 114 dump only the thread list in perf.data !! 62 dump thread list in perf.data 115 63 116 -m:: 64 -m:: 117 --map:: 65 --map:: 118 dump only the map of lock instances (a !! 66 dump map of lock instances (address:name table) 119 << 120 << 121 CONTENTION OPTIONS << 122 ------------------ << 123 << 124 -k:: << 125 --key=<value>:: << 126 Sorting key. Possible values: contende << 127 wait_max, wait_min, avg_wait. << 128 << 129 -F:: << 130 --field=<value>:: << 131 Output fields. By default it shows all << 132 and users can customize that using thi << 133 contended, wait_total, wait_max, wait_ << 134 << 135 -t:: << 136 --threads:: << 137 Show per-thread lock contention stat << 138 << 139 -b:: << 140 --use-bpf:: << 141 Use BPF program to collect lock conten << 142 using the input data. << 143 << 144 -a:: << 145 --all-cpus:: << 146 System-wide collection from all CPUs. << 147 << 148 -C:: << 149 --cpu=<value>:: << 150 Collect samples only on the list of CP << 151 provided as a comma-separated list wit << 152 are specified with -: 0-2. Default is << 153 << 154 -p:: << 155 --pid=<value>:: << 156 Record events on existing process ID ( << 157 << 158 --tid=<value>:: << 159 Record events on existing thread ID (c << 160 << 161 -M:: << 162 --map-nr-entries=<value>:: << 163 Maximum number of BPF map entries (def << 164 This will be aligned to a power of 2. << 165 << 166 --max-stack=<value>:: << 167 Maximum stack depth when collecting lo << 168 << 169 --stack-skip=<value>:: << 170 Number of stack depth to skip when fin << 171 << 172 -E:: << 173 --entries=<value>:: << 174 Display this many entries. << 175 << 176 -l:: << 177 --lock-addr:: << 178 Show lock contention stat by address << 179 << 180 -o:: << 181 --lock-owner:: << 182 Show lock contention stat by owners. << 183 requires --use-bpf. << 184 << 185 -Y:: << 186 --type-filter=<value>:: << 187 Show lock contention only for given lo << 188 Available values are: << 189 semaphore, spinlock, rwlock, rwlock: << 190 rtmutex, rwlock-rt, rwlock-rt:R, rwl << 191 mutex << 192 << 193 Note that RW-variant of locks have :R << 194 suffix are shortcuts for the both vari << 195 << 196 -L:: << 197 --lock-filter=<value>:: << 198 Show lock contention only for given lo << 199 << 200 -S:: << 201 --callstack-filter=<value>:: << 202 Show lock contention only if the calls << 203 Note that it matches the substring so << 204 and 'irq_enter_rcu'. << 205 << 206 -x:: << 207 --field-separator=<SEP>:: << 208 Show results using a CSV-style output << 209 into spreadsheets. Columns are separat << 210 << 211 --lock-cgroup:: << 212 Show lock contention stat by cgroup. << 213 << 214 -G:: << 215 --cgroup-filter=<value>:: << 216 Show lock contention only in the given << 217 << 218 67 219 SEE ALSO 68 SEE ALSO 220 -------- 69 -------- 221 linkperf:perf[1] 70 linkperf:perf[1]

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Linux/tools/perf/Documentation/perf-lock.txt