6 perf-kmem - Tool to trace/measure kernel memory properties
11 'perf kmem' {record|stat} [<options>]
15 There are two variants of perf kmem:
17 'perf kmem record <command>' to record the kmem events
18 of an arbitrary workload.
20 'perf kmem stat' to report kernel memory statistics.
26 Select the input file (default: perf.data unless stdin is a fifo)
30 Don't do ownership validation
34 Be more verbose. (show symbol address, etc)
37 Show per-callsite statistics
40 Show per-allocation statistics
43 --sort=<key[,key2...]>::
44 Sort the output (default: 'frag,hit,bytes' for slab and 'bytes,hit'
45 for page). Available sort keys are 'ptr, callsite, bytes, hit,
46 pingpong, frag' for slab and 'page, callsite, bytes, hit, order,
47 migtype, gfp' for page. This option should be preceded by one of the
48 mode selection options - i.e. --slab, --page, --alloc and/or --caller.
55 Print raw ip instead of symbol
58 Analyze SLAB allocator events.
61 Analyze page allocator events
64 Show live page stat. The perf kmem shows total allocation stat by
65 default, but this option shows live (currently allocated) pages
66 instead. (This option works with --page option only)
68 --time=<start>,<stop>::
69 Only analyze samples within given time window: <start>,<stop>. Times
70 have the format seconds.microseconds. If start is not given (i.e., time
71 string is ',x.y') then analysis starts at the beginning of the file. If
72 stop time is not given (i.e, time string is 'x.y,') then analysis goes
77 linkperf:perf-record[1]