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source: vbox/trunk/src/VBox/Runtime/testcase/tstRTMemCache.cpp@ 62534

Last change on this file since 62534 was 62477, checked in by vboxsync, 8 years ago

(C) 2016
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1/* $Id: tstRTMemCache.cpp 62477 2016-07-22 18:27:37Z vboxsync $ */
2/** @file
3 * IPRT Testcase - RTMemCache.
4 */
5
6/*
7 * Copyright (C) 2010-2016 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/memcache.h>
32
33#include <iprt/asm.h>
34#include <iprt/err.h>
35#include <iprt/initterm.h>
36#include <iprt/mem.h>
37#include <iprt/param.h>
38#include <iprt/rand.h>
39#include <iprt/string.h>
40#include <iprt/semaphore.h>
41#include <iprt/test.h>
42#include <iprt/time.h>
43#include <iprt/thread.h>
44
45
46/*********************************************************************************************************************************
47* Structures and Typedefs *
48*********************************************************************************************************************************/
49typedef struct TST3THREAD
50{
51 RTTHREAD hThread;
52 RTSEMEVENTMULTI hEvt;
53 uint64_t volatile cIterations;
54 uint32_t cbObject;
55 bool fUseCache;
56} TST3THREAD, *PTST3THREAD;
57
58
59/*********************************************************************************************************************************
60* Global Variables *
61*********************************************************************************************************************************/
62/** The test handle */
63static RTTEST g_hTest;
64/** Global mem cache handle for use in some of the testcases. */
65static RTMEMCACHE g_hMemCache;
66/** Stop indicator for tst3 threads. */
67static bool volatile g_fTst3Stop;
68
69
70/**
71 * Basic API checks.
72 * We'll return if any of these fails.
73 */
74static void tst1(void)
75{
76 RTTestISub("Basics");
77
78 /* Create one without constructor or destructor. */
79 uint32_t const cObjects = PAGE_SIZE * 2 / 256;
80 RTMEMCACHE hMemCache;
81 RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&hMemCache, 256, cObjects, 32, NULL, NULL, NULL, 0 /*fFlags*/), VINF_SUCCESS);
82 RTTESTI_CHECK_RETV(hMemCache != NIL_RTMEMCACHE);
83
84 /* Allocate a bit and free it again. */
85 void *pv = NULL;
86 RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(hMemCache, &pv), VINF_SUCCESS);
87 RTTESTI_CHECK_RETV(pv != NULL);
88 RTTESTI_CHECK_RETV(RT_ALIGN_P(pv, 32) == pv);
89 RTMemCacheFree(hMemCache, pv);
90
91 RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) != NULL);
92 RTMemCacheFree(hMemCache, pv);
93
94 /* Allocate everything and free it again, checking size constraints. */
95 for (uint32_t iLoop = 0; iLoop < 20; iLoop++)
96 {
97 /* Allocate everything. */
98 void *apv[cObjects];
99 for (uint32_t i = 0; i < cObjects; i++)
100 {
101 apv[i] = NULL;
102 RTTESTI_CHECK_RC(RTMemCacheAllocEx(hMemCache, &apv[i]), VINF_SUCCESS);
103 }
104
105 /* Check that we've got it all. */
106 int rc;
107 RTTESTI_CHECK_RC(rc = RTMemCacheAllocEx(hMemCache, &pv), VERR_MEM_CACHE_MAX_SIZE);
108 if (RT_SUCCESS(rc))
109 RTMemCacheFree(hMemCache, pv);
110
111 RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) == NULL);
112 RTMemCacheFree(hMemCache, pv);
113
114 /* Free all the allocations. */
115 for (uint32_t i = 0; i < cObjects; i++)
116 {
117 RTMemCacheFree(hMemCache, apv[i]);
118
119 RTTESTI_CHECK((pv = RTMemCacheAlloc(hMemCache)) != NULL);
120 RTMemCacheFree(hMemCache, pv);
121 }
122 }
123
124 /* Destroy it. */
125 RTTESTI_CHECK_RC(RTMemCacheDestroy(hMemCache), VINF_SUCCESS);
126 RTTESTI_CHECK_RC(RTMemCacheDestroy(NIL_RTMEMCACHE), VINF_SUCCESS);
127}
128
129
130
131/** Constructor for tst2. */
132static DECLCALLBACK(int) tst2Ctor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
133{
134 RTTESTI_CHECK(hMemCache == g_hMemCache);
135 RTTESTI_CHECK(ASMMemIsZero(pvObj, 256));
136
137 if (*(bool *)pvUser)
138 return VERR_RESOURCE_BUSY;
139
140 strcat((char *)pvObj, "ctor was called\n");
141 return VINF_SUCCESS;
142}
143
144
145/** Destructor for tst2. Checks that it was constructed and used twice. */
146static DECLCALLBACK(void) tst2Dtor(RTMEMCACHE hMemCache, void *pvObj, void *pvUser)
147{
148 RTTESTI_CHECK(!strcmp((char *)pvObj, "ctor was called\nused\nused\n"));
149 strcat((char *)pvObj, "dtor was called\n");
150}
151
152/**
153 * Test constructor / destructor.
154 */
155static void tst2(void)
156{
157 RTTestISub("Ctor/Dtor");
158
159 /* Create one without constructor or destructor. */
160 bool fFail = false;
161 uint32_t const cObjects = PAGE_SIZE * 2 / 256;
162 RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&g_hMemCache, 256, cObjects, 32, tst2Ctor, tst2Dtor, &fFail, 0 /*fFlags*/), VINF_SUCCESS);
163
164 /* A failure run first. */
165 fFail = true;
166 void *pv = (void *)0x42;
167 RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(g_hMemCache, &pv), VERR_RESOURCE_BUSY);
168 RTTESTI_CHECK(pv == (void *)0x42);
169 fFail = false;
170
171 /* To two rounds where we allocate all the objects and free them again. */
172 for (uint32_t iLoop = 0; iLoop < 2; iLoop++)
173 {
174 void *apv[cObjects];
175 for (uint32_t i = 0; i < cObjects; i++)
176 {
177 apv[i] = NULL;
178 RTTESTI_CHECK_RC_RETV(RTMemCacheAllocEx(g_hMemCache, &apv[i]), VINF_SUCCESS);
179 if (iLoop == 0)
180 RTTESTI_CHECK(!strcmp((char *)apv[i], "ctor was called\n"));
181 else
182 RTTESTI_CHECK(!strcmp((char *)apv[i], "ctor was called\nused\n"));
183 strcat((char *)apv[i], "used\n");
184 }
185
186 RTTESTI_CHECK_RETV((pv = RTMemCacheAlloc(g_hMemCache)) == NULL);
187 RTMemCacheFree(g_hMemCache, pv);
188
189 for (uint32_t i = 0; i < cObjects; i++)
190 RTMemCacheFree(g_hMemCache, apv[i]);
191 }
192
193 /* Cone, destroy the cache. */
194 RTTESTI_CHECK_RC(RTMemCacheDestroy(g_hMemCache), VINF_SUCCESS);
195}
196
197
198/**
199 * Thread that allocates
200 * @returns
201 * @param hThreadSelf The thread.
202 * @param pvArg Pointer to fUseCache.
203 */
204static DECLCALLBACK(int) tst3Thread(RTTHREAD hThreadSelf, void *pvArg)
205{
206 PTST3THREAD pThread = (PTST3THREAD)(pvArg);
207 size_t cbObject = pThread->cbObject;
208 uint64_t cIterations = 0;
209
210 /* wait for the kick-off */
211 RTTEST_CHECK_RC_OK(g_hTest, RTSemEventMultiWait(pThread->hEvt, RT_INDEFINITE_WAIT));
212
213 /* allocate and free loop */
214 if (pThread->fUseCache)
215 {
216 while (!g_fTst3Stop)
217 {
218 void *apv[64];
219 for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
220 {
221 apv[i] = RTMemCacheAlloc(g_hMemCache);
222 RTTEST_CHECK(g_hTest, apv[i] != NULL);
223 }
224 for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
225 RTMemCacheFree(g_hMemCache, apv[i]);
226
227 cIterations += RT_ELEMENTS(apv);
228 }
229 }
230 else
231 {
232 while (!g_fTst3Stop)
233 {
234 void *apv[64];
235
236 for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
237 {
238 apv[i] = RTMemAlloc(cbObject);
239 RTTEST_CHECK(g_hTest, apv[i] != NULL);
240 }
241
242 for (unsigned i = 0; i < RT_ELEMENTS(apv); i++)
243 RTMemFree(apv[i]);
244
245 cIterations += RT_ELEMENTS(apv);
246 }
247 }
248
249 /* report back the status */
250 pThread->cIterations = cIterations;
251 return VINF_SUCCESS;
252}
253
254/**
255 * Time constrained test with and unlimited N threads.
256 */
257static void tst3(uint32_t cThreads, uint32_t cbObject, int iMethod, uint32_t cSecs)
258{
259 RTTestISubF("Benchmark - %u threads, %u bytes, %u secs, %s", cThreads, cbObject, cSecs,
260 iMethod == 0 ? "RTMemCache"
261 : "RTMemAlloc");
262
263 /*
264 * Create a cache with unlimited space, a start semaphore and line up
265 * the threads.
266 */
267 RTTESTI_CHECK_RC_RETV(RTMemCacheCreate(&g_hMemCache, cbObject, 0 /*cbAlignment*/, UINT32_MAX, NULL, NULL, NULL, 0 /*fFlags*/), VINF_SUCCESS);
268
269 RTSEMEVENTMULTI hEvt;
270 RTTESTI_CHECK_RC_OK_RETV(RTSemEventMultiCreate(&hEvt));
271
272 TST3THREAD aThreads[64];
273 RTTESTI_CHECK_RETV(cThreads < RT_ELEMENTS(aThreads));
274
275 ASMAtomicWriteBool(&g_fTst3Stop, false);
276 for (uint32_t i = 0; i < cThreads; i++)
277 {
278 aThreads[i].hThread = NIL_RTTHREAD;
279 aThreads[i].cIterations = 0;
280 aThreads[i].fUseCache = iMethod == 0;
281 aThreads[i].cbObject = cbObject;
282 aThreads[i].hEvt = hEvt;
283 RTTESTI_CHECK_RC_OK_RETV(RTThreadCreateF(&aThreads[i].hThread, tst3Thread, &aThreads[i], 0,
284 RTTHREADTYPE_DEFAULT, RTTHREADFLAGS_WAITABLE, "tst3-%u", i));
285 }
286
287 /*
288 * Start the race.
289 */
290 RTTimeNanoTS(); /* warmup */
291
292 uint64_t uStartTS = RTTimeNanoTS();
293 RTTESTI_CHECK_RC_OK_RETV(RTSemEventMultiSignal(hEvt));
294 RTThreadSleep(cSecs * 1000);
295 ASMAtomicWriteBool(&g_fTst3Stop, true);
296 for (uint32_t i = 0; i < cThreads; i++)
297 RTTESTI_CHECK_RC_OK_RETV(RTThreadWait(aThreads[i].hThread, 60*1000, NULL));
298 uint64_t cElapsedNS = RTTimeNanoTS() - uStartTS;
299
300 /*
301 * Sum up the counts.
302 */
303 uint64_t cIterations = 0;
304 for (uint32_t i = 0; i < cThreads; i++)
305 cIterations += aThreads[i].cIterations;
306
307 RTTestIPrintf(RTTESTLVL_ALWAYS, "%'8u iterations per second, %'llu ns on avg\n",
308 (unsigned)((long double)cIterations * 1000000000.0 / cElapsedNS),
309 cElapsedNS / cIterations);
310
311 /* clean up */
312 RTTESTI_CHECK_RC(RTMemCacheDestroy(g_hMemCache), VINF_SUCCESS);
313 RTTESTI_CHECK_RC_OK(RTSemEventMultiDestroy(hEvt));
314}
315
316static void tst3AllMethods(uint32_t cThreads, uint32_t cbObject, uint32_t cSecs)
317{
318 tst3(cThreads, cbObject, 0, cSecs);
319 tst3(cThreads, cbObject, 1, cSecs);
320}
321
322
323int main(int argc, char **argv)
324{
325 RTTEST hTest;
326 int rc = RTTestInitAndCreate("tstRTMemCache", &hTest);
327 if (rc)
328 return rc;
329 RTTestBanner(hTest);
330 g_hTest = hTest;
331
332 tst1();
333 tst2();
334 if (RTTestIErrorCount() == 0)
335 {
336 uint32_t cSecs = argc == 1 ? 5 : 2;
337 /* threads, cbObj, cSecs */
338 tst3AllMethods( 1, 256, cSecs);
339 tst3AllMethods( 1, 32, cSecs);
340 tst3AllMethods( 1, 8, cSecs);
341 tst3AllMethods( 1, 2, cSecs);
342 tst3AllMethods( 1, 1, cSecs);
343
344 tst3AllMethods( 3, 256, cSecs);
345 tst3AllMethods( 3, 128, cSecs);
346 tst3AllMethods( 3, 64, cSecs);
347 tst3AllMethods( 3, 32, cSecs);
348 tst3AllMethods( 3, 2, cSecs);
349 tst3AllMethods( 3, 1, cSecs);
350
351 tst3AllMethods( 16, 32, cSecs);
352 }
353
354 /*
355 * Summary.
356 */
357 return RTTestSummaryAndDestroy(hTest);
358}
359
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