cddl/contrib/dtracetoolkit/Shell/sh_cpudist.d

   1 #!/usr/sbin/dtrace -Zs
   2 /*
   3  * sh_cpudist.d - measure Bourne shell on-CPU times for types of operation.
   4  *                Written for the sh DTrace provider.
   5  *
   6  * $Id: sh_cpudist.d 28 2007-09-13 10:49:37Z brendan $
   7  *
   8  * This traces shell activity from all Bourne shells on the system that are
   9  * running with sh provider support.
  10  *
  11  * USAGE: sh_cpudist.d          # hit Ctrl-C to end
  12  *
  13  * This script prints distribution plots of on-CPU time for shell
  14  * operations. Use sh_cputime.d for summary reports.
  15  *
  16  * FIELDS:
  17  *              1               Filename of the shell or shellscript
  18  *              2               Type of call (func/builtin/cmd)
  19  *              3               Name of call
  20  *
  21  * Filename and call names are printed if available.
  22  *
  23  * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
  24  *
  25  * CDDL HEADER START
  26  *
  27  *  The contents of this file are subject to the terms of the
  28  *  Common Development and Distribution License, Version 1.0 only
  29  *  (the "License").  You may not use this file except in compliance
  30  *  with the License.
  31  *
  32  *  You can obtain a copy of the license at Docs/cddl1.txt
  33  *  or http://www.opensolaris.org/os/licensing.
  34  *  See the License for the specific language governing permissions
  35  *  and limitations under the License.
  36  *
  37  * CDDL HEADER END
  38  *
  39  * 09-Sep-2007  Brendan Gregg   Created this.
  40  */
  41
  42 #pragma D option quiet
  43
  44 dtrace:::BEGIN
  45 {
  46         printf("Tracing... Hit Ctrl-C to end.\n");
  47 }
  48
  49 sh*:::function-entry
  50 {
  51         self->depth++;
  52         self->function[self->depth] = vtimestamp;
  53         self->exclude[self->depth] = 0;
  54 }
  55
  56 sh*:::function-return
  57 /self->function[self->depth]/
  58 {
  59         this->oncpu_incl = vtimestamp - self->function[self->depth];
  60         this->oncpu_excl = this->oncpu_incl - self->exclude[self->depth];
  61         self->function[self->depth] = 0;
  62         self->exclude[self->depth] = 0;
  63         this->file = basename(copyinstr(arg0));
  64         this->name = copyinstr(arg1);
  65
  66         @types_incl[this->file, "func", this->name] =
  67             quantize(this->oncpu_incl / 1000);
  68         @types_excl[this->file, "func", this->name] =
  69             quantize(this->oncpu_excl / 1000);
  70
  71         self->depth--;
  72         self->exclude[self->depth] += this->oncpu_incl;
  73 }
  74
  75 sh*:::builtin-entry
  76 {
  77         self->builtin = vtimestamp;
  78 }
  79
  80 sh*:::builtin-return
  81 /self->builtin/
  82 {
  83         this->oncpu = vtimestamp - self->builtin;
  84         self->builtin = 0;
  85
  86         @types[basename(copyinstr(arg0)), "builtin", copyinstr(arg1)] =
  87             quantize(this->oncpu / 1000);
  88
  89         self->exclude[self->depth] += this->oncpu;
  90 }
  91
  92 sh*:::command-entry
  93 {
  94         incmd[pid] = basename(copyinstr(arg0));
  95         depth[pid] = self->depth;
  96 }
  97
  98 sh*:::command-return
  99 {
 100         incmd[pid] = 0;
 101 }
 102
 103 proc:::exec-success
 104 {
 105         /*
 106          * Due to thread timing after fork(), this probe can fire before
 107          * sh*:::command-entry has, which means we can't predicate this
 108          * exec() away just yet. Store the vtimestamp in case it is needed.
 109          */
 110         self->command = vtimestamp;
 111 }
 112
 113 proc:::exit
 114 /incmd[ppid] == NULL/
 115 {
 116         self->command = 0;
 117 }
 118
 119 proc:::exit
 120 /incmd[ppid] != NULL/
 121 {
 122         this->oncpu = vtimestamp - self->command;
 123         self->command = 0;
 124
 125         @types[incmd[ppid], "cmd", execname] = quantize(this->oncpu / 1000);
 126
 127         self->exclude[depth[ppid]] += this->oncpu;
 128         incmd[ppid] = 0;
 129         depth[ppid] = 0;
 130 }
 131
 132 dtrace:::END
 133 {
 134         printf("On-CPU times (us),\n\n");
 135         printa("   %s, %s, %s %@d\n", @types);
 136
 137         printf("Exclusive function on-CPU times (us),\n\n");
 138         printa("   %s, %s, %s %@d\n", @types_excl);
 139
 140         printf("Inclusive function on-CPU times (us),\n\n");
 141         printa("   %s, %s, %s %@d\n", @types_incl);
 142 }