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/* $Id: sched-win.cpp $ */
/** @file
* IPRT - Scheduling, Win32.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/** @def WIN32_SCHED_ENABLED
* Enables the priority scheme. */
#define WIN32_SCHED_ENABLED
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP RTLOGGROUP_THREAD
#include <iprt/win/windows.h>
#include <iprt/thread.h>
#include <iprt/log.h>
#include <iprt/assert.h>
#include <iprt/errcore.h>
#include "internal/sched.h"
#include "internal/thread.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Configuration of one priority.
*/
typedef struct
{
/** The priority. */
RTPROCPRIORITY enmPriority;
/** The name of this priority. */
const char *pszName;
/** The Win32 process priority class. If ANY_PROCESS_PRIORITY_CLASS the
* process priority class is left unchanged. */
DWORD dwProcessPriorityClass;
/** Array scheduler attributes corresponding to each of the thread types. */
struct
{
/** For sanity include the array index. */
RTTHREADTYPE enmType;
/** The Win32 thread priority. */
int iThreadPriority;
} aTypes[RTTHREADTYPE_END];
} PROCPRIORITY;
/** Matches any process priority class. */
#define ANY_PROCESS_PRIORITY_CLASS (~0U)
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/**
* Array of static priority configurations.
*/
static const PROCPRIORITY g_aPriorities[] =
{
{
RTPROCPRIORITY_FLAT, "Flat", ANY_PROCESS_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_NORMAL }
}
},
{
RTPROCPRIORITY_LOW, "Low - Below Normal", BELOW_NORMAL_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
},
{
RTPROCPRIORITY_LOW, "Low", ANY_PROCESS_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_NORMAL }
}
},
{
RTPROCPRIORITY_NORMAL, "Normal - Normal", NORMAL_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
},
{
RTPROCPRIORITY_NORMAL, "Normal", ANY_PROCESS_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
},
{
RTPROCPRIORITY_HIGH, "High - High", HIGH_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
},
{
RTPROCPRIORITY_HIGH, "High - Above Normal", ABOVE_NORMAL_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
},
{
RTPROCPRIORITY_HIGH, "High", ANY_PROCESS_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
}
};
/**
* The dynamic default priority configuration.
*
* This can be recalulated at runtime depending on what the
* system allow us to do. Presently we don't do this as it's
* generally not a bit issue on Win32 hosts.
*/
static PROCPRIORITY g_aDefaultPriority =
{
RTPROCPRIORITY_LOW, "Default", ANY_PROCESS_PRIORITY_CLASS,
{
{ RTTHREADTYPE_INVALID, ~0 },
{ RTTHREADTYPE_INFREQUENT_POLLER, THREAD_PRIORITY_LOWEST },
{ RTTHREADTYPE_MAIN_HEAVY_WORKER, THREAD_PRIORITY_BELOW_NORMAL },
{ RTTHREADTYPE_EMULATION, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEFAULT, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_GUI, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_MAIN_WORKER, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_VRDP_IO, THREAD_PRIORITY_NORMAL },
{ RTTHREADTYPE_DEBUGGER, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_MSG_PUMP, THREAD_PRIORITY_ABOVE_NORMAL },
{ RTTHREADTYPE_IO, THREAD_PRIORITY_HIGHEST },
{ RTTHREADTYPE_TIMER, THREAD_PRIORITY_HIGHEST }
}
};
/** Pointer to the current priority configuration. */
static const PROCPRIORITY *g_pProcessPriority = &g_aDefaultPriority;
/**
* Calculate the scheduling properties for all the threads in the default
* process priority, assuming the current thread have the type enmType.
*
* @returns iprt status code.
* @param enmType The thread type to be assumed for the current thread.
*/
DECLHIDDEN(int) rtSchedNativeCalcDefaultPriority(RTTHREADTYPE enmType)
{
Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END); RT_NOREF_PV(enmType);
return VINF_SUCCESS;
}
DECLHIDDEN(int) rtProcNativeSetPriority(RTPROCPRIORITY enmPriority)
{
Assert(enmPriority > RTPROCPRIORITY_INVALID && enmPriority < RTPROCPRIORITY_LAST); RT_NOREF_PV(enmPriority);
if (enmPriority == RTPROCPRIORITY_DEFAULT)
{
g_pProcessPriority = &g_aDefaultPriority;
return VINF_SUCCESS;
}
for (size_t i = 0; i < RT_ELEMENTS(g_aPriorities); i++)
if ( g_aPriorities[i].enmPriority == enmPriority
&& g_aPriorities[i].dwProcessPriorityClass == ANY_PROCESS_PRIORITY_CLASS)
{
g_pProcessPriority = &g_aPriorities[i];
return VINF_SUCCESS;
}
AssertFailedReturn(VERR_INTERNAL_ERROR);
}
/**
* Gets the win32 thread handle.
*
* @returns Valid win32 handle for the specified thread.
* @param pThread The thread.
*/
DECLINLINE(HANDLE) rtThreadNativeGetHandle(PRTTHREADINT pThread)
{
if ((uintptr_t)pThread->Core.Key == GetCurrentThreadId())
return GetCurrentThread();
return (HANDLE)pThread->hThread;
}
DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType)
{
Assert(enmType > RTTHREADTYPE_INVALID && enmType < RTTHREADTYPE_END);
AssertMsg(g_pProcessPriority && g_pProcessPriority->aTypes[enmType].enmType == enmType,
("enmType=%d entry=%d\n", enmType, g_pProcessPriority->aTypes[enmType].enmType));
#ifdef WIN32_SCHED_ENABLED
HANDLE hThread = rtThreadNativeGetHandle(pThread);
if ( hThread == NULL /* No handle for alien threads. */
|| SetThreadPriority(hThread, g_pProcessPriority->aTypes[enmType].iThreadPriority))
return VINF_SUCCESS;
DWORD dwLastError = GetLastError();
int rc = RTErrConvertFromWin32(dwLastError);
AssertMsgFailed(("SetThreadPriority(%p, %d) failed, dwLastError=%d rc=%Rrc\n",
rtThreadNativeGetHandle(pThread), g_pProcessPriority->aTypes[enmType].iThreadPriority, dwLastError, rc));
return rc;
#else
return VINF_SUCCESS;
#endif
}
|
