VirtualBox

source: vbox/trunk/src/VBox/Runtime/r3/win/sched-win.cpp@ 16684

Last change on this file since 16684 was 13837, checked in by vboxsync, 16 years ago

s/%Vr\([acfs]\)/%Rr\1/g - since I'm upsetting everyone anyway, better make the most of it...

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1/* $Id: sched-win.cpp 13837 2008-11-05 02:54:02Z vboxsync $ */
2/** @file
3 * IPRT - Scheduling, Win32.
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27 * Clara, CA 95054 USA or visit http://www.sun.com if you need
28 * additional information or have any questions.
29 */
30
31/** @def WIN32_SCHED_ENABLED
32 * Enables the priority scheme. */
33#define WIN32_SCHED_ENABLED
34
35
36/*******************************************************************************
37* Header Files *
38*******************************************************************************/
39#define LOG_GROUP RTLOGGROUP_THREAD
40#include <Windows.h>
41
42#include <iprt/thread.h>
43#include <iprt/log.h>
44#include <iprt/assert.h>
45#include <iprt/err.h>
46#include "internal/sched.h"
47#include "internal/thread.h"
48
49
50/*******************************************************************************
51* Structures and Typedefs *
52*******************************************************************************/
53/**
54 * Configuration of one priority.
55 */
56typedef struct
57{
58 /** The priority. */
59 RTPROCPRIORITY enmPriority;
60 /** The name of this priority. */
61 const char *pszName;
62 /** The Win32 process priority class. If ANY_PROCESS_PRIORITY_CLASS the
63 * process priority class is left unchanged. */
64 DWORD dwProcessPriorityClass;
65 /** Array scheduler attributes corresponding to each of the thread types. */
66 struct
67 {
68 /** For sanity include the array index. */
69 RTTHREADTYPE enmType;
70 /** The Win32 thread priority. */
71 DWORD dwThreadPriority;
72 } aTypes[RTTHREADTYPE_END];
73} PROCPRIORITY;
74
75/** Matches any process priority class. */
76#define ANY_PROCESS_PRIORITY_CLASS (~0U)
77
78
79/*******************************************************************************
80* Global Variables *
81*******************************************************************************/
82/**
83 * Array of static priority configurations.
84 */
85static const PROCPRIORITY g_aPriorities[] =
86{
87 {
88 RTPROCPRIORITY_FLAT, "Flat", ANY_PROCESS_PRIORITY_CLASS,
89 {
90 { RTTHREADTYPE_INVALID, ~0 },
91 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_NORMAL },
92 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_NORMAL },
93 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
94 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
95 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
96 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
97 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
98 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_NORMAL },
99 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_NORMAL },
100 { RTTHREADTYPE_IO, THREAD_PRIORITY_NORMAL },
101 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_NORMAL }
102 }
103 },
104 {
105 RTPROCPRIORITY_LOW, "Low - Below Normal", BELOW_NORMAL_PRIORITY_CLASS,
106 {
107 { RTTHREADTYPE_INVALID, ~0 },
108 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
109 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
110 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
111 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
112 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
113 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
114 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
115 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
116 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
117 { RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
118 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
119 }
120 },
121 {
122 RTPROCPRIORITY_LOW, "Low", ANY_PROCESS_PRIORITY_CLASS,
123 {
124 { RTTHREADTYPE_INVALID, ~0 },
125 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
126 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
127 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_LOWEST },
128 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_BELOW_NORMAL },
129 { RTTHREADTYPE_GUI, THREAD_PRIORITY_BELOW_NORMAL },
130 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
131 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
132 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_NORMAL },
133 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_NORMAL },
134 { RTTHREADTYPE_IO, THREAD_PRIORITY_NORMAL },
135 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_NORMAL }
136 }
137 },
138 {
139 RTPROCPRIORITY_NORMAL, "Normal - Normal", NORMAL_PRIORITY_CLASS,
140 {
141 { RTTHREADTYPE_INVALID, ~0 },
142 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
143 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
144 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
145 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
146 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
147 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
148 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
149 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
150 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
151 { RTTHREADTYPE_IO, THREAD_PRIORITY_ABOVE_NORMAL },
152 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
153 }
154 },
155 {
156 RTPROCPRIORITY_NORMAL, "Normal", ANY_PROCESS_PRIORITY_CLASS,
157 {
158 { RTTHREADTYPE_INVALID, ~0 },
159 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
160 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
161 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
162 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
163 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
164 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
165 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
166 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
167 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
168 { RTTHREADTYPE_IO, THREAD_PRIORITY_ABOVE_NORMAL },
169 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
170 }
171 },
172 {
173 RTPROCPRIORITY_HIGH, "High - High", HIGH_PRIORITY_CLASS,
174 {
175 { RTTHREADTYPE_INVALID, ~0 },
176 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
177 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
178 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
179 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
180 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
181 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
182 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
183 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
184 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
185 { RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
186 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
187 }
188 },
189 {
190 RTPROCPRIORITY_HIGH, "High - Above Normal", ABOVE_NORMAL_PRIORITY_CLASS,
191 {
192 { RTTHREADTYPE_INVALID, ~0 },
193 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
194 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
195 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
196 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
197 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
198 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
199 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
200 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
201 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
202 { RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
203 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
204 }
205 },
206 {
207 RTPROCPRIORITY_HIGH, "High", ANY_PROCESS_PRIORITY_CLASS,
208 {
209 { RTTHREADTYPE_INVALID, ~0 },
210 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_BELOW_NORMAL },
211 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_NORMAL },
212 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
213 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_ABOVE_NORMAL },
214 { RTTHREADTYPE_GUI, THREAD_PRIORITY_ABOVE_NORMAL },
215 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_ABOVE_NORMAL },
216 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
217 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_HIGHEST },
218 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_HIGHEST },
219 { RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
220 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
221 }
222 }
223};
224
225/**
226 * The dynamic default priority configuration.
227 *
228 * This can be recalulated at runtime depending on what the
229 * system allow us to do. Presently we don't do this as it's
230 * generally not a bit issue on Win32 hosts.
231 */
232static PROCPRIORITY g_aDefaultPriority =
233{
234 RTPROCPRIORITY_LOW, "Default", ANY_PROCESS_PRIORITY_CLASS,
235 {
236 { RTTHREADTYPE_INVALID, ~0 },
237 { RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
238 { RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
239 { RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
240 { RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
241 { RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
242 { RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
243 { RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
244 { RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
245 { RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
246 { RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
247 { RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
248 }
249};
250
251
252/** Pointer to the current priority configuration. */
253static const PROCPRIORITY *g_pProcessPriority = &g_aDefaultPriority;
254
255
256/**
257 * Calculate the scheduling properties for all the threads in the default
258 * process priority, assuming the current thread have the type enmType.
259 *
260 * @returns iprt status code.
261 * @param enmType The thread type to be assumed for the current thread.
262 */
263int rtSchedNativeCalcDefaultPriority(RTTHREADTYPE enmType)
264{
265 Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
266 return VINF_SUCCESS;
267}
268
269
270/**
271 * Validates and sets the process priority.
272 * This will check that all rtThreadNativeSetPriority() will success for all the
273 * thread types when applied to the current thread.
274 *
275 * @returns iprt status code.
276 * @param enmPriority The priority to validate and set.
277 * @remark Located in sched.
278 */
279int rtProcNativeSetPriority(RTPROCPRIORITY enmPriority)
280{
281 Assert(enmPriority > RTPROCPRIORITY_INVALID && enmPriority < RTPROCPRIORITY_LAST);
282 return VINF_SUCCESS;
283}
284
285
286/**
287 * Gets the win32 thread handle.
288 *
289 * @returns Valid win32 handle for the specified thread.
290 * @param pThread The thread.
291 */
292inline HANDLE rtThreadNativeGetHandle(PRTTHREADINT pThread)
293{
294 if ((uintptr_t)pThread->Core.Key == GetCurrentThreadId())
295 return GetCurrentThread();
296 return (HANDLE)pThread->hThread;
297}
298
299
300/**
301 * Sets the priority of the thread according to the thread type
302 * and current process priority.
303 *
304 * The RTTHREADINT::enmType member has not yet been updated and will be updated by
305 * the caller on a successful return.
306 *
307 * @returns iprt status code.
308 * @param pThread The thread in question.
309 * @param enmType The thread type.
310 * @remark Located in sched.
311 */
312int rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
313{
314 Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
315 AssertMsg(g_pProcessPriority && g_pProcessPriority->aTypes[enmType].enmType == enmType,
316 ("enmType=%d entry=%d\n", enmType, g_pProcessPriority->aTypes[enmType].enmType));
317
318#ifdef WIN32_SCHED_ENABLED
319 if (SetThreadPriority(rtThreadNativeGetHandle(pThread), g_pProcessPriority->aTypes[enmType].dwThreadPriority))
320 return VINF_SUCCESS;
321
322 DWORD dwLastError = GetLastError();
323 int rc = RTErrConvertFromWin32(dwLastError);
324 AssertMsgFailed(("SetThreadPriority(%p, %d) failed, dwLastError=%d rc=%Rrc\n",
325 rtThreadNativeGetHandle(pThread), g_pProcessPriority->aTypes[enmType].dwThreadPriority, dwLastError, rc));
326 return rc;
327#else
328 return VINF_SUCCESS;
329#endif
330}
331
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