VirtualBox

source: vbox/trunk/src/VBox/Runtime/testcase/tstRTSemXRoads.cpp@ 93115

Last change on this file since 93115 was 93115, checked in by vboxsync, 3 years ago

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1/* $Id: tstRTSemXRoads.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2/** @file
3 * IPRT Testcase - RTSemXRoads.
4 */
5
6/*
7 * Copyright (C) 2009-2022 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include <iprt/semaphore.h>
32
33#include <iprt/asm.h>
34#include <iprt/errcore.h>
35#include <iprt/initterm.h>
36#include <iprt/test.h>
37#include <iprt/thread.h>
38#include <iprt/time.h>
39
40
41/*********************************************************************************************************************************
42* Global Variables *
43*********************************************************************************************************************************/
44static RTTEST g_hTest;
45
46static uint32_t volatile g_cNSCrossings;
47static uint32_t volatile g_cEWCrossings;
48static uint64_t g_u64StartMilliTS;
49static uint32_t g_cSecs;
50static RTSEMXROADS g_hXRoads;
51
52
53static int tstTrafficThreadCommon(uintptr_t iThread, bool fNS)
54{
55 RT_NOREF_PV(iThread);
56
57 for (uint32_t iLoop = 0; RTTimeMilliTS() - g_u64StartMilliTS < g_cSecs*1000; iLoop++)
58 {
59 /* fudge */
60 if ((iLoop % 223) == 222)
61 RTThreadYield();
62 else if ((iLoop % 16127) == 16126)
63 RTThreadSleep(1);
64
65 if (fNS)
66 {
67 RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSEnter(g_hXRoads), VINF_SUCCESS);
68 ASMAtomicIncU32(&g_cNSCrossings);
69 RTTEST_CHECK_RC(g_hTest,RTSemXRoadsNSLeave(g_hXRoads), VINF_SUCCESS);
70 }
71 else
72 {
73 RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWEnter(g_hXRoads), VINF_SUCCESS);
74 ASMAtomicIncU32(&g_cEWCrossings);
75 RTTEST_CHECK_RC(g_hTest,RTSemXRoadsEWLeave(g_hXRoads), VINF_SUCCESS);
76 }
77 }
78 return VINF_SUCCESS;
79}
80
81
82static DECLCALLBACK(int) tstTrafficNSThread(RTTHREAD hSelf, void *pvUser)
83{
84 RT_NOREF_PV(hSelf);
85
86 uintptr_t iThread = (uintptr_t)pvUser;
87 return tstTrafficThreadCommon(iThread, true);
88}
89
90
91static DECLCALLBACK(int) tstTrafficEWThread(RTTHREAD hSelf, void *pvUser)
92{
93 RT_NOREF_PV(hSelf);
94
95 uintptr_t iThread = (uintptr_t)pvUser;
96 return tstTrafficThreadCommon(iThread, false);
97}
98
99
100static void tstTraffic(unsigned cThreads, unsigned cSecs)
101{
102 RTTestSubF(g_hTest, "Traffic - %u threads per direction, %u sec", cThreads, cSecs);
103
104 /*
105 * Create X worker threads which drives in the south/north direction and Y
106 * worker threads which drives in the west/east direction. Let them drive
107 * in a loop for 15 seconds with slight delays between some of the runs and
108 * then check the numbers.
109 */
110
111 /* init */
112 RTTHREAD ahThreadsX[8];
113 for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
114 ahThreadsX[i] = NIL_RTTHREAD;
115 AssertRelease(RT_ELEMENTS(ahThreadsX) >= cThreads);
116
117 RTTHREAD ahThreadsY[8];
118 for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
119 ahThreadsY[i] = NIL_RTTHREAD;
120 AssertRelease(RT_ELEMENTS(ahThreadsY) >= cThreads);
121
122 g_cNSCrossings = 0;
123 g_cEWCrossings = 0;
124 g_cSecs = cSecs;
125 g_u64StartMilliTS = RTTimeMilliTS();
126
127 /* create */
128 RTTEST_CHECK_RC_RETV(g_hTest, RTSemXRoadsCreate(&g_hXRoads), VINF_SUCCESS);
129
130 int rc = VINF_SUCCESS;
131 for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
132 {
133 rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficNSThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
134 RTTEST_CHECK_RC_OK(g_hTest, rc);
135 }
136
137 for (unsigned i = 0; i < cThreads && RT_SUCCESS(rc); i++)
138 {
139 rc = RTThreadCreateF(&ahThreadsX[i], tstTrafficEWThread, (void *)(uintptr_t)i, 0, RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "NS-%u", i);
140 RTTEST_CHECK_RC_OK(g_hTest, rc);
141 }
142
143 /* wait */
144 for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsX); i++)
145 if (ahThreadsX[i] != NIL_RTTHREAD)
146 {
147 int rc2 = RTThreadWaitNoResume(ahThreadsX[i], (60 + cSecs) * 1000, NULL);
148 RTTEST_CHECK_RC_OK(g_hTest, rc2);
149 }
150
151 for (unsigned i = 0; i < RT_ELEMENTS(ahThreadsY); i++)
152 if (ahThreadsY[i] != NIL_RTTHREAD)
153 {
154 int rc2 = RTThreadWaitNoResume(ahThreadsY[i], (60 + cSecs) * 1000, NULL);
155 RTTEST_CHECK_RC_OK(g_hTest, rc2);
156 }
157
158 RTTEST_CHECK_MSG_RETV(g_hTest, g_cEWCrossings > 10 && g_cNSCrossings,
159 (g_hTest, "cEWCrossings=%u g_cNSCrossings=%u\n", g_cEWCrossings, g_cNSCrossings));
160 RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cNSCrossings=%u\n", g_cNSCrossings);
161 RTTestPrintf(g_hTest, RTTESTLVL_ALWAYS, "cEWCrossings=%u\n", g_cEWCrossings);
162}
163
164
165
166static bool tstBasics(void)
167{
168 RTTestSub(g_hTest, "Basics");
169
170 RTSEMXROADS hXRoads;
171 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsCreate(&hXRoads), VINF_SUCCESS, false);
172
173 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
174 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
175 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
176 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
177
178 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWEnter(hXRoads), VINF_SUCCESS, false);
179 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsEWLeave(hXRoads), VINF_SUCCESS, false);
180 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
181 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
182
183 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSEnter(hXRoads), VINF_SUCCESS, false);
184 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsNSLeave(hXRoads), VINF_SUCCESS, false);
185
186 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(hXRoads), VINF_SUCCESS, false);
187 RTTEST_CHECK_RC_RET(g_hTest, RTSemXRoadsDestroy(NIL_RTSEMXROADS), VINF_SUCCESS, false);
188
189 return true;
190}
191
192
193int main()
194{
195 int rc = RTTestInitAndCreate("tstRTSemXRoads", &g_hTest);
196 if (rc)
197 return rc;
198 RTTestBanner(g_hTest);
199
200 if (tstBasics())
201 {
202 tstTraffic(1, 5);
203 tstTraffic(2, 5);
204 tstTraffic(4, 15);
205 tstTraffic(8, 10);
206 }
207
208 return RTTestSummaryAndDestroy(g_hTest);
209}
210
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