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

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Differences between /tools/perf/Documentation/perf-kmem.txt (Version linux-6.12-rc7) and /tools/perf/Documentation/perf-kmem.txt (Version linux-5.5.19)


  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 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                                                    27 
 31 -f::                                               28 -f::
 32 --force::                                          29 --force::
 33         Don't do ownership validation              30         Don't do ownership validation
 34                                                    31 
 35 -v::                                               32 -v::
 36 --verbose::                                        33 --verbose::
 37         Be more verbose. (show symbol address,     34         Be more verbose. (show symbol address, etc)
 38                                                    35 
 39 --caller::                                         36 --caller::
 40         Show per-callsite statistics               37         Show per-callsite statistics
 41                                                    38 
 42 --alloc::                                          39 --alloc::
 43         Show per-allocation statistics             40         Show per-allocation statistics
 44                                                    41 
 45 -s <key[,key2...]>::                               42 -s <key[,key2...]>::
 46 --sort=<key[,key2...]>::                           43 --sort=<key[,key2...]>::
 47         Sort the output (default: 'frag,hit,by     44         Sort the output (default: 'frag,hit,bytes' for slab and 'bytes,hit'
 48         for page).  Available sort keys are 'p     45         for page).  Available sort keys are 'ptr, callsite, bytes, hit,
 49         pingpong, frag' for slab and 'page, ca     46         pingpong, frag' for slab and 'page, callsite, bytes, hit, order,
 50         migtype, gfp' for page.  This option s     47         migtype, gfp' for page.  This option should be preceded by one of the
 51         mode selection options - i.e. --slab,      48         mode selection options - i.e. --slab, --page, --alloc and/or --caller.
 52                                                    49 
 53 -l <num>::                                         50 -l <num>::
 54 --line=<num>::                                     51 --line=<num>::
 55         Print n lines only                         52         Print n lines only
 56                                                    53 
 57 --raw-ip::                                         54 --raw-ip::
 58         Print raw ip instead of symbol             55         Print raw ip instead of symbol
 59                                                    56 
 60 --slab::                                           57 --slab::
 61         Analyze SLAB allocator events.             58         Analyze SLAB allocator events.
 62                                                    59 
 63 --page::                                           60 --page::
 64         Analyze page allocator events              61         Analyze page allocator events
 65                                                    62 
 66 --live::                                           63 --live::
 67         Show live page stat.  The perf kmem sh     64         Show live page stat.  The perf kmem shows total allocation stat by
 68         default, but this option shows live (c     65         default, but this option shows live (currently allocated) pages
 69         instead.  (This option works with --pa     66         instead.  (This option works with --page option only)
 70                                                    67 
 71 --time=<start>,<stop>::                            68 --time=<start>,<stop>::
 72         Only analyze samples within given time     69         Only analyze samples within given time window: <start>,<stop>. Times
 73         have the format seconds.microseconds.      70         have the format seconds.microseconds. If start is not given (i.e., time
 74         string is ',x.y') then analysis starts     71         string is ',x.y') then analysis starts at the beginning of the file. If
 75         stop time is not given (i.e, time stri     72         stop time is not given (i.e, time string is 'x.y,') then analysis goes
 76         to end of file.                            73         to end of file.
 77                                                    74 
 78 SEE ALSO                                           75 SEE ALSO
 79 --------                                           76 --------
 80 linkperf:perf-record[1]                            77 linkperf:perf-record[1]
                                                      

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