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+# perf(1)
+
+```markdown
+perf list      show supported hw/sw events
+
+perf stat
+  -p <pid> .. show stats for running process
+  -I <ms> ... show stats periodically over interval <ms>
+  -e <ev> ... filter for events
+
+perf top
+  -p <pid> .. show stats for running process
+  -F <hz> ... sampling frequency
+  -K ........ hide kernel threads
+
+perf record
+  -p <pid> ............... record stats for running process
+  -F <hz> ................ sampling frequency
+  --call-graph <method> .. [fp, dwarf, lbr] method how to caputre backtrace
+                           fp   : use frame-pointer, need to compile with
+                                  -fno-omit-frame-pointer
+                           dwarf: use .cfi debug information
+                           lbr  : use hardware last branch record facility
+  -g ..................... short-hand for --call-graph fp
+  -e <ev> ................ filter for events
+
+perf report
+  -n .................... annotate symbols with nr of samples
+  --stdio ............... report to stdio, if not presen tui mode
+  -g graph,0.5,caller ... show caller based call chains with value >0.5
+```
+
+```markdown
+Useful <ev>:
+  page-faults
+  minor-faults
+  major-faults
+  cpu-cycles`
+  task-clock
+```
+
+## [`Flamegraph`](https://github.com/brendangregg/FlameGraph)
+
+### Flamegraph with single event trace
+```markdown
+perf record -g -e cpu-cycles -p <pid>
+perf script | FlameGraph/stackcollapse-perf.pl | FlameGraph/flamegraph.pl > cycles-flamegraph.svg
+```
+
+### Flamegraph with multiple event traces
+```markdown
+perf record -g -e cpu-cycles,page-faults -p <pid>
+perf script --per-event-dump
+# fold & generate as above
+```
+