cddl/contrib/dtracetoolkit/Examples/rb_malloc_example.txt

   1 The following is an example of rb_malloc.d.
   2
   3 WARNING: This script is not 100% accurate; This prints graphical
   4 representations of libc malloc() byte distributions by "recent" Ruby operation,
   5 which we hope will be usually correct. This is an experimental script that may
   6 be improved over time.
   7
   8 Here we can see it running on Code/Ruby/func_abc.rb
   9
  10 # rb_malloc.d -c ./func_abc.rb
  11 Tracing... Hit Ctrl-C to end.
  12 Function A
  13 Function B
  14 Function C
  15 Ruby malloc byte distributions by recent Ruby operation,
  16    func_abc.rb, method, Object::print
  17            value  ------------- Distribution ------------- count
  18                1 |                                         0
  19                2 |@@@@@@@@@@@@@@@@@@@@                     1
  20                4 |                                         0
  21                8 |                                         0
  22               16 |@@@@@@@@@@@@@@@@@@@@                     1
  23               32 |                                         0
  24
  25    func_abc.rb, method, Module::method_added
  26            value  ------------- Distribution ------------- count
  27                8 |                                         0
  28               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 2
  29               32 |                                         0
  30
  31    ., objnew, fatal
  32            value  ------------- Distribution ------------- count
  33                1 |                                         0
  34                2 |@                                        1
  35                4 |@                                        1
  36                8 |@@@                                      2
  37               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@             22
  38               32 |@@@@@@                                   5
  39               64 |                                         0
  40
  41    func_abc.rb, method, IO::write
  42            value  ------------- Distribution ------------- count
  43             2048 |                                         0
  44             4096 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1
  45             8192 |                                         0
  46
  47    ., objnew, SystemStackError
  48            value  ------------- Distribution ------------- count
  49                1 |                                         0
  50                2 |                                         3
  51                4 |@@@@                                     32
  52                8 |@@                                       15
  53               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@          279
  54               32 |@@@                                      30
  55               64 |                                         2
  56              128 |                                         0
  57
  58    ., objnew, NoMemoryError
  59            value  ------------- Distribution ------------- count
  60                1 |                                         0
  61                2 |@                                        3
  62                4 |@@@                                      17
  63                8 |@@@@@@                                   37
  64               16 |@@@@@@@@@@@@@@@@@@@@@@@@                 146
  65               32 |@@                                       13
  66               64 |                                         2
  67              128 |@@@                                      20
  68              256 |                                         0
  69              512 |                                         0
  70             1024 |                                         1
  71             2048 |                                         0
  72
  73    ., objnew, ThreadGroup
  74            value  ------------- Distribution ------------- count
  75                1 |                                         0
  76                2 |                                         8
  77                4 |@@@                                      224
  78                8 |@                                        93
  79               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@              1806
  80               32 |@@@@@@@@                                 496
  81               64 |                                         3
  82              128 |                                         2
  83              256 |                                         0
  84              512 |                                         1
  85             1024 |                                         0
  86
  87    ., objnew, Object
  88            value  ------------- Distribution ------------- count
  89                1 |                                         0
  90                2 |                                         35
  91                4 |@@@                                      291
  92                8 |@@@                                      300
  93               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@           2679
  94               32 |@@                                       215
  95               64 |                                         7
  96              128 |                                         0
  97
  98    ruby, startup, -
  99            value  ------------- Distribution ------------- count
 100                1 |                                         0
 101                2 |@                                        10
 102                4 |@@@                                      34
 103                8 |@@@                                      38
 104               16 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@          409
 105               32 |@@                                       30
 106               64 |                                         1
 107              128 |                                         0
 108              256 |                                         0
 109              512 |                                         0
 110             1024 |                                         2
 111             2048 |                                         0
 112             4096 |                                         0
 113             8192 |                                         0
 114            16384 |                                         0
 115            32768 |                                         0
 116            65536 |                                         0
 117           131072 |                                         1
 118           262144 |                                         0
 119
 120