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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 }
    161