VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/testcase/tstSupTscDelta.cpp@ 78286

Last change on this file since 78286 was 76553, checked in by vboxsync, 6 years ago

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1/* $Id: tstSupTscDelta.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2/** @file
3 * SUP Testcase - Global Info Page TSC Delta Measurement Utility.
4 */
5
6/*
7 * Copyright (C) 2015-2019 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 <VBox/sup.h>
32#include <iprt/errcore.h>
33#include <iprt/assert.h>
34#include <iprt/stream.h>
35#include <iprt/string.h>
36#include <iprt/getopt.h>
37#include <iprt/test.h>
38#include <iprt/thread.h>
39
40
41
42int main(int argc, char **argv)
43{
44 RTTEST hTest;
45 RTEXITCODE rcExit = RTTestInitExAndCreate(argc, &argv, 0 /*fRtInit*/, "tstSupTscDelta", &hTest);
46 if (rcExit != RTEXITCODE_SUCCESS)
47 return rcExit;
48
49 /*
50 * Parse args
51 */
52 static const RTGETOPTDEF g_aOptions[] =
53 {
54 { "--iterations", 'i', RTGETOPT_REQ_INT32 },
55 { "--delay", 'd', RTGETOPT_REQ_INT32 },
56 };
57
58 uint32_t cIterations = 0; /* Currently 0 so that it doesn't upset testing. */
59 uint32_t cMsSleepBetweenIterations = 10;
60
61 int ch;
62 RTGETOPTUNION ValueUnion;
63 RTGETOPTSTATE GetState;
64 RTGetOptInit(&GetState, argc, argv, g_aOptions, RT_ELEMENTS(g_aOptions), 1, RTGETOPTINIT_FLAGS_NO_STD_OPTS);
65 while ((ch = RTGetOpt(&GetState, &ValueUnion)))
66 {
67 switch (ch)
68 {
69 case 'd':
70 cMsSleepBetweenIterations = ValueUnion.u32;
71 break;
72 case 'i':
73 cIterations = ValueUnion.u32;
74 break;
75
76 default:
77 return RTGetOptPrintError(ch, &ValueUnion);
78 }
79 }
80 if (!cIterations)
81 return RTTestSkipAndDestroy(hTest, "Nothing to do. The --iterations argument is 0 or not given.");
82
83 /*
84 * Init
85 */
86 PSUPDRVSESSION pSession = NIL_RTR0PTR;
87 int rc = SUPR3Init(&pSession);
88 if (RT_SUCCESS(rc))
89 {
90 PSUPGLOBALINFOPAGE pGip = g_pSUPGlobalInfoPage;
91 if (pGip)
92 {
93 if (pGip->enmUseTscDelta < SUPGIPUSETSCDELTA_PRACTICALLY_ZERO)
94 return RTTestSkipAndDestroy(hTest, "No deltas to play with: enmUseTscDelta=%d\n", pGip->enmUseTscDelta);
95
96 /*
97 * Init stats.
98 */
99 struct
100 {
101 int64_t iLowest;
102 int64_t iHighest;
103 int64_t iTotal;
104 uint64_t uAbsMin;
105 uint64_t uAbsMax;
106 uint64_t uAbsTotal;
107 } aCpuStats[RTCPUSET_MAX_CPUS];
108 RT_ZERO(aCpuStats);
109 for (uint32_t i = 0; i < pGip->cCpus; i++)
110 {
111 aCpuStats[i].iLowest = INT64_MAX;
112 aCpuStats[i].iHighest = INT64_MIN;
113 aCpuStats[i].uAbsMin = UINT64_MAX;
114 }
115
116 /*
117 * Do the work.
118 */
119 for (uint32_t iIteration = 0; ; iIteration++)
120 {
121 /*
122 * Display the current deltas and gather statistics.
123 */
124 RTPrintf("tstSupTscDelta: Iteration #%u results:", iIteration);
125 for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
126 {
127 int64_t iTscDelta = pGip->aCPUs[iCpu].i64TSCDelta;
128
129 /* print */
130 if ((iCpu % 4) == 0)
131 RTPrintf("\ntstSupTscDelta:");
132 if (pGip->aCPUs[iCpu].enmState != SUPGIPCPUSTATE_ONLINE)
133 RTPrintf(" %02x: offline ", iCpu);
134 else if (iTscDelta != INT64_MAX)
135 RTPrintf(" %02x: %-12lld", iCpu, iTscDelta);
136 else
137 RTPrintf(" %02x: INT64_MAX ", iCpu);
138
139 /* stats */
140 if ( iTscDelta != INT64_MAX
141 && pGip->aCPUs[iCpu].enmState == SUPGIPCPUSTATE_ONLINE)
142 {
143 if (aCpuStats[iCpu].iLowest > iTscDelta)
144 aCpuStats[iCpu].iLowest = iTscDelta;
145 if (aCpuStats[iCpu].iHighest < iTscDelta)
146 aCpuStats[iCpu].iHighest = iTscDelta;
147 aCpuStats[iCpu].iTotal += iTscDelta;
148
149 uint64_t uAbsTscDelta = iTscDelta >= 0 ? (uint64_t)iTscDelta : (uint64_t)-iTscDelta;
150 if (aCpuStats[iCpu].uAbsMin > uAbsTscDelta)
151 aCpuStats[iCpu].uAbsMin = uAbsTscDelta;
152 if (aCpuStats[iCpu].uAbsMax < uAbsTscDelta)
153 aCpuStats[iCpu].uAbsMax = uAbsTscDelta;
154 aCpuStats[iCpu].uAbsTotal += uAbsTscDelta;
155 }
156 }
157 if (((pGip->cCpus - 1) % 4) != 0)
158 RTPrintf("\n");
159
160 /*
161 * Done?
162 */
163 if (iIteration + 1 >= cIterations)
164 break;
165
166 /*
167 * Force a new measurement.
168 */
169 RTThreadSleep(cMsSleepBetweenIterations);
170 for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
171 if (pGip->aCPUs[iCpu].enmState == SUPGIPCPUSTATE_ONLINE)
172 {
173 rc = SUPR3TscDeltaMeasure(pGip->aCPUs[iCpu].idCpu, false /*fAsync*/, true /*fForce*/, 64, 16 /*ms*/);
174 if (RT_FAILURE(rc))
175 RTTestFailed(hTest, "SUPR3TscDeltaMeasure failed on %#x: %Rrc", pGip->aCPUs[iCpu].idCpu, rc);
176 }
177 }
178
179 /*
180 * Display statistics that we've gathered.
181 */
182 RTPrintf("tstSupTscDelta: Results:\n");
183 int64_t iLowest = INT64_MAX;
184 int64_t iHighest = INT64_MIN;
185 int64_t iTotal = 0;
186 uint32_t cTotal = 0;
187 for (uint32_t iCpu = 0; iCpu < pGip->cCpus; iCpu++)
188 {
189 if (pGip->aCPUs[iCpu].enmState != SUPGIPCPUSTATE_ONLINE)
190 RTPrintf("tstSupTscDelta: %02x: offline\n", iCpu);
191 else
192 {
193 RTPrintf("tstSupTscDelta: %02x: lowest=%-12lld highest=%-12lld average=%-12lld spread=%-12lld\n",
194 iCpu,
195 aCpuStats[iCpu].iLowest,
196 aCpuStats[iCpu].iHighest,
197 aCpuStats[iCpu].iTotal / cIterations,
198 aCpuStats[iCpu].iHighest - aCpuStats[iCpu].iLowest);
199 RTPrintf( "tstSupTscDelta: absmin=%-12llu absmax=%-12llu absavg=%-12llu idCpu=%#4x idApic=%#4x\n",
200 aCpuStats[iCpu].uAbsMin,
201 aCpuStats[iCpu].uAbsMax,
202 aCpuStats[iCpu].uAbsTotal / cIterations,
203 pGip->aCPUs[iCpu].idCpu,
204 pGip->aCPUs[iCpu].idApic);
205 if (iLowest > aCpuStats[iCpu].iLowest)
206 iLowest = aCpuStats[iCpu].iLowest;
207 if (iHighest < aCpuStats[iCpu].iHighest)
208 iHighest = aCpuStats[iCpu].iHighest;
209 iTotal += aCpuStats[iCpu].iHighest;
210 cTotal += cIterations;
211 }
212 }
213 RTPrintf("tstSupTscDelta: all: lowest=%-12lld highest=%-12lld average=%-12lld spread=%-12lld\n",
214 iLowest, iHighest, iTotal / cTotal, iHighest - iLowest);
215 }
216 else
217 RTTestFailed(hTest, "g_pSUPGlobalInfoPage is NULL");
218
219 SUPR3Term(false /*fForced*/);
220 }
221 else
222 RTTestFailed(hTest, "SUPR3Init failed: %Rrc", rc);
223 return RTTestSummaryAndDestroy(hTest);
224}
225
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