This module implements function relative to task migration. This module is used by slave kernel. More...

#include "task_migration.h"
#include "../../include/kernel_pkg.h"
#include "../include/services.h"
#include "../include/plasma.h"
#include "task_location.h"
#include "local_scheduler.h"
#include "communication.h"
#include "utils.h"

Include dependency graph for task_migration.c:

Macros
#define	TASK_MIGRATION_DEBUG 0
	When enable shows puts related to task migration.

Functions
void	send_task_migrated (int migrated_task, int old_proc, unsigned int master_address)

void	migrate_dynamic_memory (TCB *tcb_aux)

void	migrate_CODE (TCB *tcb_migration)

void	handle_migration_code (volatile ServiceHeader p, TCB migrate_tcb)

void	handle_migration_TCB (volatile ServiceHeader p, TCB migrate_tcb)

void	handle_migration_task_location (volatile ServiceHeader p, TCB migrate_tcb)

void	handle_migration_request_msg (volatile ServiceHeader p, TCB migrate_tcb)

void	handle_migration_stack (volatile ServiceHeader p, TCB migrate_tcb)

void	handle_migration_DATA_BSS (volatile ServiceHeader p, TCB migrate_tcb, unsigned int master_address)

int	handle_task_migration (volatile ServiceHeader p, TCB tcb_ptr)

int	handle_migration (volatile ServiceHeader *p, unsigned int master_address)

Detailed Description

This module implements function relative to task migration. This module is used by slave kernel.

HEMPS VERSION - 8.0 - support for RT applications

Distribution: June 2016

Created by: Marcelo Ruaro - contact: marce.nosp@m.lo.r.nosp@m.uaro@.nosp@m.acad.nosp@m..pucr.nosp@m.s.br

Research group: GAPH-PUCRS - contact: ferna.nosp@m.ndo..nosp@m.morae.nosp@m.s@pu.nosp@m.crs.b.nosp@m.r

Function Documentation

int handle_migration	(	volatile ServiceHeader *	p,
		unsigned int	master_address
	)

Handles all task migration packets, calling the appropriated sub-function.

Parameters

p	ServiceHeader pointer of the packet a generic task migration packet
master_address	Address of the kernel master of the slave processor

Returns: The necessity of call the scheduler, 1 - need scheduler, 0 not need scheduler

void handle_migration_code	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb
	)

Handle the migration code, coping the code to a free page. It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the task code
migrate_tcb	The TCB pointer of the task to be migrated

void handle_migration_DATA_BSS	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb,
		unsigned int	master_address
	)

Handles the migration of the task DATA and BSS data sections It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the task DATA and BSS data sections
migrate_tcb	The TCB pointer of the task to be migrated

void handle_migration_request_msg	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb
	)

Handles the migration of the task message request data It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the message request data
migrate_tcb	The TCB pointer of the task to be migrated

void handle_migration_stack	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb
	)

Handles the migration of the task stack data It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the task stack data
migrate_tcb	The TCB pointer of the task to be migrated

void handle_migration_task_location	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb
	)

Handles the migration of the task task location data It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the task location data
migrate_tcb	The TCB pointer of the task to be migrated

void handle_migration_TCB	(	volatile ServiceHeader *	p,
		TCB *	migrate_tcb
	)

Handles the migration of the task TCB information It is called by the target processor (the new processor)

Parameters

p	ServiceHeader pointer of the packet with the TCB data
migrate_tcb	The TCB pointer of the task to be migrated

int handle_task_migration	(	volatile ServiceHeader *	p,
		TCB *	tcb_ptr
	)

Handles a task migration order from the kernel master This function is called by the source processor (the old processor)

Parameters

p	ServiceHeader pointer of the packet with task migration order
tcb_ptr	TCB pointer of the task to be migrated

void migrate_CODE ( TCB * tcb_migration )

Migrate the code data to the new processor. It is called by the source processor (the older processor) The code is static because corresponds the the task instructions loaded when the task is allocated in a given processor

Parameters

tcb_migration The TCB pointer of the task to be migrated

void migrate_dynamic_memory ( TCB * tcb_aux )

This function os the core of task migration. It is called by the source processor (the older processor) Its job is to migrate to the new processor the dynamic data section that can change during task execution.

Parameters

tcb_aux The TCB pointer of the task to be migrated

void send_task_migrated	(	int	migrated_task,
		int	old_proc,
		unsigned int	master_address
	)

Assembles and sends a TASK_MIGRATED packet to the master kernel

Parameters

migrated_task	Migrated task ID
old_proc	Old processor address of task
master_address	Master address of the task

Macros

Functions

Detailed Description

Function Documentation