1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 1997-2003 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate #include <sys/types.h>
30*0Sstevel@tonic-gate #include <sys/inttypes.h>
31*0Sstevel@tonic-gate #include <sys/time.h>
32*0Sstevel@tonic-gate #include <sys/thread.h>
33*0Sstevel@tonic-gate #include <sys/cpuvar.h>
34*0Sstevel@tonic-gate #include <sys/cyclic.h>
35*0Sstevel@tonic-gate #include <sys/lockstat.h>
36*0Sstevel@tonic-gate #include <sys/spl.h>
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate /*
39*0Sstevel@tonic-gate * Resident support for the lockstat driver.
40*0Sstevel@tonic-gate */
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate dtrace_id_t lockstat_probemap[LS_NPROBES];
43*0Sstevel@tonic-gate void (*lockstat_probe)(dtrace_id_t, uintptr_t, uintptr_t,
44*0Sstevel@tonic-gate uintptr_t, uintptr_t, uintptr_t);
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate int
lockstat_active_threads(void)47*0Sstevel@tonic-gate lockstat_active_threads(void)
48*0Sstevel@tonic-gate {
49*0Sstevel@tonic-gate kthread_t *tp;
50*0Sstevel@tonic-gate int active = 0;
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate mutex_enter(&pidlock);
53*0Sstevel@tonic-gate tp = curthread;
54*0Sstevel@tonic-gate do {
55*0Sstevel@tonic-gate if (tp->t_lockstat)
56*0Sstevel@tonic-gate active++;
57*0Sstevel@tonic-gate } while ((tp = tp->t_next) != curthread);
58*0Sstevel@tonic-gate mutex_exit(&pidlock);
59*0Sstevel@tonic-gate return (active);
60*0Sstevel@tonic-gate }
61