4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
30 dtrace_vtime_enable(void)
32 dtrace_vtime_state_t state, nstate = 0;
35 state = dtrace_vtime_active;
38 case DTRACE_VTIME_INACTIVE:
39 nstate = DTRACE_VTIME_ACTIVE;
42 case DTRACE_VTIME_INACTIVE_TNF:
43 nstate = DTRACE_VTIME_ACTIVE_TNF;
46 case DTRACE_VTIME_ACTIVE:
47 case DTRACE_VTIME_ACTIVE_TNF:
48 panic("DTrace virtual time already enabled");
52 } while (dtrace_cas32((uint32_t *)&dtrace_vtime_active,
53 state, nstate) != state);
57 dtrace_vtime_disable(void)
59 dtrace_vtime_state_t state, nstate = 0;
62 state = dtrace_vtime_active;
65 case DTRACE_VTIME_ACTIVE:
66 nstate = DTRACE_VTIME_INACTIVE;
69 case DTRACE_VTIME_ACTIVE_TNF:
70 nstate = DTRACE_VTIME_INACTIVE_TNF;
73 case DTRACE_VTIME_INACTIVE:
74 case DTRACE_VTIME_INACTIVE_TNF:
75 panic("DTrace virtual time already disabled");
79 } while (dtrace_cas32((uint32_t *)&dtrace_vtime_active,
80 state, nstate) != state);
84 dtrace_vtime_switch(kthread_t *next)
86 dtrace_icookie_t cookie;
89 cookie = dtrace_interrupt_disable();
90 ts = dtrace_gethrtime();
92 if (curthread->t_dtrace_start != 0) {
93 curthread->t_dtrace_vtime += ts - curthread->t_dtrace_start;
94 curthread->t_dtrace_start = 0;
98 next->t_dtrace_start = ts;
100 dtrace_interrupt_enable(cookie);