/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 * This D script is used as an example in the Solaris Dynamic Tracing Guide
 * wiki in the "sched Provider" Chapter.
 *
 * The full text of the this chapter may be found here:
 *
 *   http://docs.oracle.com/cd/E36784_01/html/E36846/sched-provider.html
 *
 * On machines that have DTrace installed, this script is available as
 * whatfor.d in /usr/demo/dtrace, a directory that contains all D scripts
 * used in the Solaris Dynamic Tracing Guide.  A table of the scripts and their
 * corresponding chapters may be found here:
 *
 *   file:///usr/demo/dtrace/index.html
 */

sched:::off-cpu
/curlwpsinfo->pr_state == SSLEEP/
{
	/*
	 * We're sleeping.  Track our sobj type.
	 */
	self->sobj = curlwpsinfo->pr_stype;
	self->bedtime = timestamp;
}

sched:::off-cpu
/curlwpsinfo->pr_state == SRUN/
{
	self->bedtime = timestamp;
}

sched:::on-cpu
/self->bedtime && !self->sobj/
{
	@["preempted"] = quantize(timestamp - self->bedtime);
	self->bedtime = 0;
}

sched:::on-cpu
/self->sobj/
{
	@[self->sobj == SOBJ_MUTEX ? "kernel-level lock" :
	    self->sobj == SOBJ_RWLOCK ? "rwlock" :
	    self->sobj == SOBJ_CV ? "condition variable" :
	    self->sobj == SOBJ_SEMA ? "semaphore" :
	    self->sobj == SOBJ_USER ? "user-level lock" :
	    self->sobj == SOBJ_USER_PI ? "user-level prio-inheriting lock" :
	    self->sobj == SOBJ_SHUTTLE ? "shuttle" : "unknown"] =
	    quantize(timestamp - self->bedtime);

	self->sobj = 0;
	self->bedtime = 0;
}