1/*
2 * Copyright (c) 2006 Apple Inc.  All Rights Reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29
30#ifdef	__sun
31#pragma ident	"@(#)lmbench_read.c	1.5	05/08/04 Apple Inc."
32#endif
33
34
35#ifdef linux
36#define	_XOPEN_SOURCE 500
37#endif
38
39#include <unistd.h>
40#include <stdlib.h>
41#include <stdio.h>
42#include <fcntl.h>
43
44#include "../libmicro.h"
45
46typedef struct {
47	char			*ts_buf;
48	int			ts_fd;
49} tsd_t;
50
51#define	DEFF			"/dev/zero"
52#define	DEFS			1024
53
54static char			*optf = DEFF;
55static long long		opts = DEFS;
56int				optw = 0;
57
58int
59benchmark_init()
60{
61	lm_tsdsize = sizeof (tsd_t);
62
63	(void) sprintf(lm_optstr, "f:s:w");
64
65	(void) sprintf(lm_usage,
66	    "       [-f file-to-read (default %s)]\n"
67	    "       [-s buffer-size (default %d)]\n"
68	    "       [-w (store a byte to each page after read)]\n"
69	    "notes: measures lmbench_read()\n",
70	    DEFF, DEFS);
71
72	(void) sprintf(lm_header, "%8s", "size");
73
74	lm_defB = 1;
75
76	return (0);
77}
78
79int
80benchmark_optswitch(int opt, char *optarg)
81{
82	switch (opt) {
83	case 'w':
84		optw = getpagesize();
85		break;
86	case 'f':
87		optf = optarg;
88		break;
89	case 's':
90		opts = sizetoll(optarg);
91		break;
92	default:
93		return (-1);
94	}
95	return (0);
96}
97
98int
99benchmark_initrun()
100{
101	return (0);
102}
103
104int
105benchmark_initbatch(void *tsd)
106{
107	tsd_t			*ts = (tsd_t *)tsd;
108
109	if (ts->ts_buf == NULL) {
110		ts->ts_buf = malloc(opts);
111		ts->ts_fd = open(optf, O_RDONLY);
112	}
113
114	(void) lseek(ts->ts_fd, 0, SEEK_SET);
115
116	return (0);
117}
118
119int
120benchmark(void *tsd, result_t *res)
121{
122	tsd_t			*ts = (tsd_t *)tsd;
123	int			i;
124	int 			j;
125/*
126 * The libmicro test uses a for loop as below:
127 *   for (i = 0; i < lm_optB; i++) {
128 *
129 * we can probably get away with using lm_optB
130 * in the while loop below
131 *
132 */
133	i = 0;
134
135	while (i++ < lm_optB) {
136		if (read(ts->ts_fd, ts->ts_buf, opts) != opts) {
137			res->re_errors++;
138		}
139		if (optw)
140			for (j = 0; j < opts; j += optw)
141				ts->ts_buf[j] = 0;
142	}
143	res->re_count = i;
144
145	return (0);
146}
147
148char *
149benchmark_result()
150{
151	static char		result[256];
152
153	(void) sprintf(result, "%8lld", opts);
154
155	return (result);
156}
157