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Increase the priority of the Windows threads used by the FreeRTOS Windows port, and, because the threads have high priority and run on the same core, prevent the port running on single core hosts so as to avoid locking up the host.

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pull/1/head
Richard Barry 8 years ago
parent f98b675671
commit ca9edf3531
2 changed files with 49 additions and 45 deletions
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93
FreeRTOS/Source/portable/MSVC-MingW/port.c
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@ -83,21 +83,12 @@
#define portMAX_INTERRUPTS ( ( uint32_t ) sizeof( uint32_t ) * 8UL ) /* The number of bits in an uint32_t. */
#define portNO_CRITICAL_NESTING ( ( uint32_t ) 0 )
/* The priorities at which the various components of the simulation execute.
Priorities are higher when a soak test is performed to lessen the effect of
Windows interfering with the timing. */
#define portSOAK_TEST
#ifndef portSOAK_TEST
#define portDELETE_SELF_THREAD_PRIORITY THREAD_PRIORITY_HIGHEST /* Must be highest. */
#define portSIMULATED_INTERRUPTS_THREAD_PRIORITY THREAD_PRIORITY_NORMAL
#define portSIMULATED_TIMER_THREAD_PRIORITY THREAD_PRIORITY_BELOW_NORMAL
#define portTASK_THREAD_PRIORITY THREAD_PRIORITY_IDLE
#else
#define portDELETE_SELF_THREAD_PRIORITY THREAD_PRIORITY_TIME_CRITICAL /* Must be highest. */
#define portSIMULATED_INTERRUPTS_THREAD_PRIORITY THREAD_PRIORITY_HIGHEST
#define portSIMULATED_TIMER_THREAD_PRIORITY THREAD_PRIORITY_ABOVE_NORMAL
#define portTASK_THREAD_PRIORITY THREAD_PRIORITY_NORMAL
#endif
/* The priorities at which the various components of the simulation execute. */
#define portDELETE_SELF_THREAD_PRIORITY THREAD_PRIORITY_TIME_CRITICAL /* Must be highest. */
#define portSIMULATED_INTERRUPTS_THREAD_PRIORITY THREAD_PRIORITY_TIME_CRITICAL
#define portSIMULATED_TIMER_THREAD_PRIORITY THREAD_PRIORITY_HIGHEST
#define portTASK_THREAD_PRIORITY THREAD_PRIORITY_ABOVE_NORMAL
/*
* Created as a high priority thread, this function uses a timer to simulate
* a tick interrupt being generated on an embedded target. In this Windows
@ -264,16 +255,6 @@ xThreadState *pxThreadState = NULL;
int8_t *pcTopOfStack = ( int8_t * ) pxTopOfStack;
const SIZE_T xStackSize = 1024; /* Set the size to a small number which will get rounded up to the minimum possible. */
#ifdef portSOAK_TEST
{
/* Ensure highest priority class is inherited. */
if( !SetPriorityClass( GetCurrentProcess(), REALTIME_PRIORITY_CLASS ) )
{
printf( "SetPriorityClass() failed\r\n" );
}
}
#endif
/* In this simulated case a stack is not initialised, but instead a thread
is created that will execute the task being created. The thread handles
the context switching itself. The xThreadState object is placed onto
@ -295,31 +276,53 @@ const SIZE_T xStackSize = 1024; /* Set the size to a small number which will get
BaseType_t xPortStartScheduler( void )
{
void *pvHandle;
int32_t lSuccess = pdPASS;
xThreadState *pxThreadState;
/* Install the interrupt handlers used by the scheduler itself. */
vPortSetInterruptHandler( portINTERRUPT_YIELD, prvProcessYieldInterrupt );
vPortSetInterruptHandler( portINTERRUPT_TICK, prvProcessTickInterrupt );
/* Create the events and mutexes that are used to synchronise all the
threads. */
pvInterruptEventMutex = CreateMutex( NULL, FALSE, NULL );
pvInterruptEvent = CreateEvent( NULL, FALSE, FALSE, NULL );
void *pvHandle = NULL;
int32_t lSuccess;
xThreadState *pxThreadState = NULL;
SYSTEM_INFO xSystemInfo;
if( ( pvInterruptEventMutex == NULL ) || ( pvInterruptEvent == NULL ) )
/* This port runs windows threads with extremely high priority. All the
threads execute on the same core - to prevent locking up the host only start
if the host has multiple cores. */
GetSystemInfo( &xSystemInfo );
if( xSystemInfo.dwNumberOfProcessors <= 1 )
{
printf( "This version of the FreeRTOS Windows port can only be used on multi-core hosts.\r\n" );
lSuccess = pdFAIL;
}
/* Set the priority of this thread such that it is above the priority of
the threads that run tasks. This higher priority is required to ensure
simulated interrupts take priority over tasks. */
pvHandle = GetCurrentThread();
if( pvHandle == NULL )
else
{
lSuccess = pdFAIL;
lSuccess = pdPASS;
/* The highest priority class is used to [try to] prevent other Windows
activity interfering with FreeRTOS timing too much. */
if( SetPriorityClass( GetCurrentProcess(), REALTIME_PRIORITY_CLASS ) == 0 )
{
printf( "SetPriorityClass() failed\r\n" );
}
/* Install the interrupt handlers used by the scheduler itself. */
vPortSetInterruptHandler( portINTERRUPT_YIELD, prvProcessYieldInterrupt );
vPortSetInterruptHandler( portINTERRUPT_TICK, prvProcessTickInterrupt );
/* Create the events and mutexes that are used to synchronise all the
threads. */
pvInterruptEventMutex = CreateMutex( NULL, FALSE, NULL );
pvInterruptEvent = CreateEvent( NULL, FALSE, FALSE, NULL );
if( ( pvInterruptEventMutex == NULL ) || ( pvInterruptEvent == NULL ) )
{
lSuccess = pdFAIL;
}
/* Set the priority of this thread such that it is above the priority of
the threads that run tasks. This higher priority is required to ensure
simulated interrupts take priority over tasks. */
pvHandle = GetCurrentThread();
if( pvHandle == NULL )
{
lSuccess = pdFAIL;
}
}
if( lSuccess == pdPASS )

1
FreeRTOS/Source/portable/MSVC-MingW/portmacro.h
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@ -71,6 +71,7 @@
#define PORTMACRO_H
#include <Windows.h>
#include <WinBase.h>
/******************************************************************************
Defines

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