forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
|
|
* Copyright (c) 2012 SUSE LINUX Products GmbH
|
|
*
|
|
* 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; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* 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
|
|
* <http://www.gnu.org/licenses/gpl-2.0.html>
|
|
*/
|
|
|
|
#ifndef SYSEMU_CPU_THROTTLE_H
|
|
#define SYSEMU_CPU_THROTTLE_H
|
|
|
|
#include "qemu/timer.h"
|
|
|
|
/**
|
|
* cpu_throttle_init:
|
|
*
|
|
* Initialize the CPU throttling API.
|
|
*/
|
|
void cpu_throttle_init(void);
|
|
|
|
/**
|
|
* cpu_throttle_set:
|
|
* @new_throttle_pct: Percent of sleep time. Valid range is 1 to 99.
|
|
*
|
|
* Throttles all vcpus by forcing them to sleep for the given percentage of
|
|
* time. A throttle_percentage of 25 corresponds to a 75% duty cycle roughly.
|
|
* (example: 10ms sleep for every 30ms awake).
|
|
*
|
|
* cpu_throttle_set can be called as needed to adjust new_throttle_pct.
|
|
* Once the throttling starts, it will remain in effect until cpu_throttle_stop
|
|
* is called.
|
|
*/
|
|
void cpu_throttle_set(int new_throttle_pct);
|
|
|
|
/**
|
|
* cpu_throttle_stop:
|
|
*
|
|
* Stops the vcpu throttling started by cpu_throttle_set.
|
|
*/
|
|
void cpu_throttle_stop(void);
|
|
|
|
/**
|
|
* cpu_throttle_active:
|
|
*
|
|
* Returns: %true if the vcpus are currently being throttled, %false otherwise.
|
|
*/
|
|
bool cpu_throttle_active(void);
|
|
|
|
/**
|
|
* cpu_throttle_get_percentage:
|
|
*
|
|
* Returns the vcpu throttle percentage. See cpu_throttle_set for details.
|
|
*
|
|
* Returns: The throttle percentage in range 1 to 99.
|
|
*/
|
|
int cpu_throttle_get_percentage(void);
|
|
|
|
#endif /* SYSEMU_CPU_THROTTLE_H */
|