1 perf-kmem(1)
2 ============
3
4 NAME
5 ----
6 perf-kmem - Tool to trace/measure kernel memor
7
8 SYNOPSIS
9 --------
10 [verse]
11 'perf kmem' [<options>] {record|stat}
12
13 DESCRIPTION
14 -----------
15 There are two variants of perf kmem:
16
17 'perf kmem [<options>] record [<perf-record-
18 record the kmem events of an arbitrary workl
19 record' options may be specified after recor
20 change the output file name.
21
22 'perf kmem [<options>] stat' to report kerne
23
24 OPTIONS
25 -------
26 -i <file>::
27 --input=<file>::
28 For stat, select the input file (defau
29 fifo)
30
31 -f::
32 --force::
33 Don't do ownership validation
34
35 -v::
36 --verbose::
37 Be more verbose. (show symbol address,
38
39 --caller::
40 Show per-callsite statistics
41
42 --alloc::
43 Show per-allocation statistics
44
45 -s <key[,key2...]>::
46 --sort=<key[,key2...]>::
47 Sort the output (default: 'frag,hit,by
48 for page). Available sort keys are 'p
49 pingpong, frag' for slab and 'page, ca
50 migtype, gfp' for page. This option s
51 mode selection options - i.e. --slab,
52
53 -l <num>::
54 --line=<num>::
55 Print n lines only
56
57 --raw-ip::
58 Print raw ip instead of symbol
59
60 --slab::
61 Analyze SLAB allocator events.
62
63 --page::
64 Analyze page allocator events
65
66 --live::
67 Show live page stat. The perf kmem sh
68 default, but this option shows live (c
69 instead. (This option works with --pa
70
71 --time=<start>,<stop>::
72 Only analyze samples within given time
73 have the format seconds.microseconds.
74 string is ',x.y') then analysis starts
75 stop time is not given (i.e, time stri
76 to end of file.
77
78 SEE ALSO
79 --------
80 linkperf:perf-record[1]
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