1 perf-kmem(1) 1 perf-kmem(1)
2 ============ 2 ============
3 3
4 NAME 4 NAME
5 ---- 5 ----
6 perf-kmem - Tool to trace/measure kernel memor !! 6 perf-kmem - Tool to trace/measure kernel memory(slab) properties
7 7
8 SYNOPSIS 8 SYNOPSIS
9 -------- 9 --------
10 [verse] 10 [verse]
11 'perf kmem' [<options>] {record|stat} !! 11 'perf kmem' {record|stat} [<options>]
12 12
13 DESCRIPTION 13 DESCRIPTION
14 ----------- 14 -----------
15 There are two variants of perf kmem: 15 There are two variants of perf kmem:
16 16
17 'perf kmem [<options>] record [<perf-record- !! 17 'perf kmem record <command>' to record the kmem events
18 record the kmem events of an arbitrary workl !! 18 of an arbitrary workload.
19 record' options may be specified after recor <<
20 change the output file name. <<
21 19
22 'perf kmem [<options>] stat' to report kerne !! 20 'perf kmem stat' to report kernel memory statistics.
23 21
24 OPTIONS 22 OPTIONS
25 ------- 23 -------
26 -i <file>:: 24 -i <file>::
27 --input=<file>:: 25 --input=<file>::
28 For stat, select the input file (defau !! 26 Select the input file (default: perf.data unless stdin is a fifo)
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 27
39 --caller:: 28 --caller::
40 Show per-callsite statistics 29 Show per-callsite statistics
41 30
42 --alloc:: 31 --alloc::
43 Show per-allocation statistics 32 Show per-allocation statistics
44 33
45 -s <key[,key2...]>:: 34 -s <key[,key2...]>::
46 --sort=<key[,key2...]>:: 35 --sort=<key[,key2...]>::
47 Sort the output (default: 'frag,hit,by !! 36 Sort the output (default: frag,hit,bytes)
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 37
53 -l <num>:: 38 -l <num>::
54 --line=<num>:: 39 --line=<num>::
55 Print n lines only 40 Print n lines only
56 41
57 --raw-ip:: 42 --raw-ip::
58 Print raw ip instead of symbol 43 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 44
78 SEE ALSO 45 SEE ALSO
79 -------- 46 --------
80 linkperf:perf-record[1] 47 linkperf:perf-record[1]
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