preempt.c File Reference

LP preemption management. More...

#include <timestretch.h>
#include <arch/atomic.h>
#include <core/core.h>
#include <scheduler/process.h>
#include <scheduler/scheduler.h>
#include <mm/dymelor.h>

Include dependency graph for preempt.c:

Go to the source code of this file.

Functions
void	preempt_callback (void)
void	preempt_init (void)
void	preempt_fini (void)
void	reset_min_in_transit (unsigned int thread)
void	update_min_in_transit (unsigned int thread, simtime_t lvt)
void	preempt (void)
void	enable_preemption (void)
void	disable_preemption (void)

Variables
static simtime_t *volatile	min_in_transit_lvt
atomic_t	preempt_count
atomic_t	overtick_platform
atomic_t	would_preempt
__thread volatile bool	platform_mode = true
__thread bool	rolling_back = false

Detailed Description

LP preemption management.

LP preemption management

Copyright

Copyright (C) 2008-2019 HPDCS Group https://hpdcs.github.io

This file is part of ROOT-Sim (ROme OpTimistic Simulator).

ROOT-Sim 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; only version 3 of the License applies.

ROOT-Sim 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 ROOT-Sim; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Author

Alessandro Pellegrini

Francesco Quaglia

Date

March, 2015

Definition in file preempt.c.

Function Documentation

void preempt

(

void

)

This function is activated when control is transferred back from kernel space, when an APIC timer interrupt is received. When this is the case, this function quickly checks whether some other LP has gained an increased priority over the currently executing one, and in the case changes the control flow so as to activate it.

Definition at line 134 of file preempt.c.