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1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms
5 * of the Common Development and Distribution License
6 * (the "License"). You may not use this file except
7 * in compliance with the License.
8 *
9 * You can obtain a copy of the license at
10 * src/OPENSOLARIS.LICENSE
11 * or http://www.opensolaris.org/os/licensing.
12 * See the License for the specific language governing
13 * permissions and limitations under the License.
14 *
15 * When distributing Covered Code, include this CDDL
16 * HEADER in each file and include the License file at
17 * usr/src/OPENSOLARIS.LICENSE. If applicable,
18 * add the following below this CDDL HEADER, with the
19 * fields enclosed by brackets "[]" replaced with your
20 * own identifying information: Portions Copyright [yyyy]
21 * [name of copyright owner]
22 *
23 * CDDL HEADER END
24 */
25
26 /*
27 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
28 * Use is subject to license terms.
29 */
30
31 /*
32 * benchmark exit
33 */
34
35 #include <sys/types.h>
36 #include <sys/wait.h>
37 #include <unistd.h>
38 #include <stdlib.h>
39 #include <stdio.h>
40
41 #include "libmicro.h"
42
43 typedef struct {
44 int ts_once;
45 int *ts_pids;
46 } tsd_t;
47
48 static int opte = 0;
49 static barrier_t *b;
50
51 int
52 benchmark_init()
53 {
54 lm_tsdsize = sizeof (tsd_t);
55 (void) sprintf(lm_optstr, "e");
56
57 (void) sprintf(lm_usage,
58 " [-e] (uses _exit() rather than exit())"
59 "notes: measures exit()\n");
60
61 return (0);
62 }
63
64 /*ARGSUSED*/
65 int
66 benchmark_optswitch(int opt, char *optarg)
67 {
68 switch (opt) {
69 case 'e':
70 opte = 1;
71 break;
72 default:
73 return (-1);
74 }
75 return (0);
76 }
77
78 int
79 benchmark_initrun()
80 {
81 b = barrier_create(lm_optP * lm_optT * (lm_optB + 1), 0);
82
83 return (0);
84 }
85
86 int
87 benchmark_finirun()
88 {
89 (void) barrier_destroy(b);
90
91 return (0);
92 }
93
94 int
95 benchmark_initbatch(void *tsd)
96 {
97 tsd_t *ts = (tsd_t *)tsd;
98 int i;
99 int errors = 0;
100
101 if (ts->ts_once++ == 0) {
102 ts->ts_pids = (int *)malloc(lm_optB * sizeof (pid_t));
103 if (ts->ts_pids == NULL) {
104 errors ++;
105 }
106 }
107
108 /*
109 * create processes to exit
110 */
111
112 for (i = 0; i < lm_optB; i++) {
113 ts->ts_pids[i] = fork();
114 switch (ts->ts_pids[i]) {
115 case 0:
116 (void) barrier_queue(b, NULL);
117 if (opte)
118 _exit(0);
119 exit(0);
120 break;
121 case -1:
122 errors ++;
123 break;
124 default:
125 continue;
126 }
127 }
128
129 return (errors);
130 }
131
132 /*ARGSUSED*/
133 int
134 benchmark(void *tsd, result_t *res)
135 {
136 int i;
137
138 /*
139 * start them all exiting
140 */
141
142 (void) barrier_queue(b, NULL);
143
144 /*
145 * wait for them all to exit
146 */
147
148 for (i = 0; i < lm_optB; i++) {
149 switch (waitpid((pid_t)-1, NULL, 0)) {
150 case 0:
151 continue;
152 case -1:
153 res->re_errors++;
154 }
155 }
156
157 res->re_count = i;
158
159 return (0);
160 }