1 /* $NetBSD: t_fpu.c,v 1.3 2017/01/16 16:27:43 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __COPYRIGHT("@(#) Copyright (c) 2008\ 31 The NetBSD Foundation, inc. All rights reserved."); 32 __RCSID("$NetBSD: t_fpu.c,v 1.3 2017/01/16 16:27:43 christos Exp $"); 33 34 /* 35 * This is adapted from part of csw/cstest of the MPD implementation by 36 * the University of Arizona CS department (http://www.cs.arizona.edu/sr/) 37 * which is in the public domain: 38 * 39 * "The MPD system is in the public domain and you may use and distribute it 40 * as you wish. We ask that you retain credits referencing the University 41 * of Arizona and that you identify any changes you make. 42 * 43 * We can't provide a warranty with MPD; it's up to you to determine its 44 * suitability and reliability for your needs. We would like to hear of 45 * any problems you encounter but we cannot promise a timely correction." 46 * 47 * It was changed to use pthread_create() and sched_yield() instead of 48 * the internal MPD context switching primitives by Ignatios Souvatzis 49 * <is@netbsd.org>. 50 */ 51 52 #include <errno.h> 53 #include <math.h> 54 #include <pthread.h> 55 #include <sched.h> 56 #include <stdio.h> 57 #include <string.h> 58 #include <stdlib.h> 59 #include <unistd.h> 60 61 #include <atf-c.h> 62 63 #ifdef __FreeBSD__ 64 #include <errno.h> 65 #include <string.h> 66 #endif 67 68 #include "h_common.h" 69 70 #define N_RECURSE 10 71 72 static void recurse(void); 73 74 int recursion_depth = 0; 75 pthread_mutex_t recursion_depth_lock; 76 77 static void * 78 stir(void *p) 79 { 80 double *q = (double *)p; 81 double x = *q++; 82 double y = *q++; 83 double z = *q++; 84 85 for (;;) { 86 x = sin ((y = cos (x + y + .4)) - (z = cos (x + z + .6))); 87 ATF_REQUIRE_MSG(sched_yield() == 0, 88 "sched_yield failed: %s", strerror(errno)); 89 } 90 } 91 92 static double 93 mul3(double x, double y, double z) 94 { 95 ATF_REQUIRE_MSG(sched_yield() == 0, 96 "sched_yield failed: %s", strerror(errno)); 97 98 return x * y * z; 99 } 100 101 static void * 102 bar(void *p) 103 { 104 double d; 105 int rc; 106 107 d = mul3(mul3(2., 3., 5.), mul3(7., 11., 13.), mul3(17., 19., 23.)); 108 ATF_REQUIRE_EQ(d, 223092870.); 109 110 PTHREAD_REQUIRE(pthread_mutex_lock(&recursion_depth_lock)); 111 rc = recursion_depth++; 112 PTHREAD_REQUIRE(pthread_mutex_unlock(&recursion_depth_lock)); 113 114 if (rc < N_RECURSE) 115 recurse(); 116 else 117 atf_tc_pass(); 118 119 /* NOTREACHED */ 120 return NULL; 121 } 122 123 static void 124 recurse(void) { 125 pthread_t s2; 126 PTHREAD_REQUIRE(pthread_create(&s2, 0, bar, 0)); 127 sleep(20); /* XXX must be long enough for our slowest machine */ 128 } 129 130 ATF_TC(fpu); 131 ATF_TC_HEAD(fpu, tc) 132 { 133 atf_tc_set_md_var(tc, "descr", 134 "Checks that thread context switches will leave the " 135 "floating point computations unharmed"); 136 } 137 ATF_TC_BODY(fpu, tc) 138 { 139 double stirseed[] = { 1.7, 3.2, 2.4 }; 140 pthread_t s5; 141 142 printf("Testing threaded floating point computations...\n"); 143 144 PTHREAD_REQUIRE(pthread_mutex_init(&recursion_depth_lock, 0)); 145 146 PTHREAD_REQUIRE(pthread_create(&s5, 0, stir, stirseed)); 147 recurse(); 148 149 atf_tc_fail("exiting from main"); 150 } 151 152 ATF_TP_ADD_TCS(tp) 153 { 154 ATF_TP_ADD_TC(tp, fpu); 155 156 return atf_no_error(); 157 } 158