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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 fork
     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 static barrier_t		*b;
     44 
     45 typedef struct {
     46 	int			ts_once;
     47 	int			*ts_pids;
     48 } tsd_t;
     49 
     50 int
     51 benchmark_init()
     52 {
     53 	lm_tsdsize = sizeof (tsd_t);
     54 	(void) sprintf(lm_usage, "notes: measures fork()\n");
     55 
     56 	return (0);
     57 }
     58 
     59 int
     60 benchmark_initrun()
     61 {
     62 	b = barrier_create(lm_optP * lm_optT * (lm_optB + 1), 0);
     63 
     64 	return (0);
     65 }
     66 
     67 int
     68 benchmark_finirun()
     69 {
     70 	(void) barrier_destroy(b);
     71 
     72 	return (0);
     73 }
     74 
     75 int
     76 benchmark_initbatch(void *tsd)
     77 {
     78 	tsd_t			*ts = (tsd_t *)tsd;
     79 	int			errors = 0;
     80 
     81 	if (ts->ts_once++ == 0) {
     82 		ts->ts_pids = (int *)malloc(lm_optB * sizeof (pid_t));
     83 		if (ts->ts_pids == NULL) {
     84 			errors++;
     85 		}
     86 	}
     87 
     88 	return (errors);
     89 }
     90 
     91 int
     92 benchmark(void *tsd, result_t *res)
     93 {
     94 	tsd_t			*ts = (tsd_t *)tsd;
     95 	int			i;
     96 
     97 	for (i = 0; i < lm_optB; i++) {
     98 		ts->ts_pids[i] = fork();
     99 		switch (ts->ts_pids[i]) {
    100 		case 0:
    101 			(void) barrier_queue(b, NULL);
    102 			exit(0);
    103 			break;
    104 		case -1:
    105 			res->re_errors++;
    106 			break;
    107 		default:
    108 			continue;
    109 		}
    110 	}
    111 	res->re_count = lm_optB;
    112 
    113 	(void) barrier_queue(b, NULL);
    114 
    115 	return (0);
    116 }
    117 
    118 int
    119 benchmark_finibatch(void *tsd)
    120 {
    121 	tsd_t			*ts = (tsd_t *)tsd;
    122 	int			i;
    123 
    124 	for (i = 0; i < lm_optB; i++) {
    125 		if (ts->ts_pids[i] > 0) {
    126 			(void) waitpid(ts->ts_pids[i], NULL, 0);
    127 		}
    128 	}
    129 
    130 	return (0);
    131 }
    132