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feat(freertos): Optimized xTaskIncrementTickOtherCores()

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This commit optimizes the xTaskIncrementTickOtherCores() function by
avoiding unnecessary context switches.
This commit is contained in:
Sudeep Mohanty
2024-01-02 17:14:02 +01:00
parent 0b8e6c66c4
commit 6e074c02e0
2 changed files with 55 additions and 33 deletions
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55
components/freertos/FreeRTOS-Kernel/tasks.c
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@@ -6,7 +6,7 @@
*
* SPDX-License-Identifier: MIT
*
* SPDX-FileContributor: 2023 Espressif Systems (Shanghai) CO LTD
* SPDX-FileContributor: 2023-2024 Espressif Systems (Shanghai) CO LTD
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
@@ -3284,15 +3284,52 @@ BaseType_t xTaskIncrementTick( void )
* For SMP, since this function is only run on core
* 0, we only need to context switch if the unblocked
* task can run on core 0 and has a higher priority
* than the current task. */
if( ( taskIS_AFFINITY_COMPATIBLE( 0, pxTCB ) == pdTRUE ) && ( pxTCB->uxPriority > pxCurrentTCBs[ 0 ]->uxPriority ) )
* than the current task.
*
* If the unblocked task has affinity to the other
* core or no affinity then we need to set xYieldPending
* for the other core if the unblocked task has a priority
* higher than the priority of the currently running task
* on the other core. */
if( taskIS_AFFINITY_COMPATIBLE( 0, pxTCB ) == pdTRUE )
{
xSwitchRequired = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
if( pxTCB->uxPriority > pxCurrentTCBs[ 0 ]->uxPriority )
{
xSwitchRequired = pdTRUE;
}
#if ( configNUMBER_OF_CORES > 1 )
else if( pxTCB->xCoreID == tskNO_AFFINITY )
{
if( pxTCB->uxPriority > pxCurrentTCBs[ 1 ]->uxPriority )
{
xYieldPending[ 1 ] = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
#endif /* if ( configNUMBER_OF_CORES > 1 ) */
else
{
mtCOVERAGE_TEST_MARKER();
}
}
#if ( configNUMBER_OF_CORES > 1 )
else
{
if( pxTCB->uxPriority > pxCurrentTCBs[ 1 ]->uxPriority )
{
xYieldPending[ 1 ] = pdTRUE;
}
else
{
mtCOVERAGE_TEST_MARKER();
}
}
#endif /* if ( configNUMBER_OF_CORES > 1 ) */
}
#endif /* configUSE_PREEMPTION */
}
@@ -5440,7 +5477,7 @@ static void prvResetNextTaskUnblockTime( void )
/* Write the rest of the string. */
#if ( configTASKLIST_INCLUDE_COREID == 1 )
{
const BaseType_t xCoreID = ( pxTaskStatusArray[ x ].xCoreID == tskNO_AFFINITY ) ? -1 : pxTaskStatusArray[ x ].xCoreID ;
const BaseType_t xCoreID = ( pxTaskStatusArray[ x ].xCoreID == tskNO_AFFINITY ) ? -1 : pxTaskStatusArray[ x ].xCoreID;
sprintf( pcWriteBuffer, "\t%c\t%u\t%d\t%u\t%u\r\n", cStatus, ( unsigned int ) pxTaskStatusArray[ x ].uxCurrentPriority, ( int ) xCoreID, ( unsigned int ) pxTaskStatusArray[ x ].usStackHighWaterMark, ( unsigned int ) pxTaskStatusArray[ x ].xTaskNumber ); /*lint !e586 sprintf() allowed as this is compiled with many compilers and this is a utility function only - not part of the core kernel implementation. */
}
#else /* configTASKLIST_INCLUDE_COREID == 1 */