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#!/usr/sbin/dtrace -Zs
/*
* sh_cpudist.d - measure Bourne shell on-CPU times for types of operation.
* Written for the sh DTrace provider.
*
* $Id: sh_cpudist.d 28 2007-09-13 10:49:37Z brendan $
*
* This traces shell activity from all Bourne shells on the system that are
* running with sh provider support.
*
* USAGE: sh_cpudist.d # hit Ctrl-C to end
*
* This script prints distribution plots of on-CPU time for shell
* operations. Use sh_cputime.d for summary reports.
*
* FIELDS:
* 1 Filename of the shell or shellscript
* 2 Type of call (func/builtin/cmd)
* 3 Name of call
*
* Filename and call names are printed if available.
*
* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at Docs/cddl1.txt
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* CDDL HEADER END
*
* 09-Sep-2007 Brendan Gregg Created this.
*/
#pragma D option quiet
dtrace:::BEGIN
{
printf("Tracing... Hit Ctrl-C to end.\n");
}
sh*:::function-entry
{
self->depth++;
self->function[self->depth] = vtimestamp;
self->exclude[self->depth] = 0;
}
sh*:::function-return
/self->function[self->depth]/
{
this->oncpu_incl = vtimestamp - self->function[self->depth];
this->oncpu_excl = this->oncpu_incl - self->exclude[self->depth];
self->function[self->depth] = 0;
self->exclude[self->depth] = 0;
this->file = basename(copyinstr(arg0));
this->name = copyinstr(arg1);
@types_incl[this->file, "func", this->name] =
quantize(this->oncpu_incl / 1000);
@types_excl[this->file, "func", this->name] =
quantize(this->oncpu_excl / 1000);
self->depth--;
self->exclude[self->depth] += this->oncpu_incl;
}
sh*:::builtin-entry
{
self->builtin = vtimestamp;
}
sh*:::builtin-return
/self->builtin/
{
this->oncpu = vtimestamp - self->builtin;
self->builtin = 0;
@types[basename(copyinstr(arg0)), "builtin", copyinstr(arg1)] =
quantize(this->oncpu / 1000);
self->exclude[self->depth] += this->oncpu;
}
sh*:::command-entry
{
incmd[pid] = basename(copyinstr(arg0));
depth[pid] = self->depth;
}
sh*:::command-return
{
incmd[pid] = 0;
}
proc:::exec-success
{
/*
* Due to thread timing after fork(), this probe can fire before
* sh*:::command-entry has, which means we can't predicate this
* exec() away just yet. Store the vtimestamp in case it is needed.
*/
self->command = vtimestamp;
}
proc:::exit
/incmd[ppid] == NULL/
{
self->command = 0;
}
proc:::exit
/incmd[ppid] != NULL/
{
this->oncpu = vtimestamp - self->command;
self->command = 0;
@types[incmd[ppid], "cmd", execname] = quantize(this->oncpu / 1000);
self->exclude[depth[ppid]] += this->oncpu;
incmd[ppid] = 0;
depth[ppid] = 0;
}
dtrace:::END
{
printf("On-CPU times (us),\n\n");
printa(" %s, %s, %s %@d\n", @types);
printf("Exclusive function on-CPU times (us),\n\n");
printa(" %s, %s, %s %@d\n", @types_excl);
printf("Inclusive function on-CPU times (us),\n\n");
printa(" %s, %s, %s %@d\n", @types_incl);
}
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