libbalancer.h

OpenMosix工具

/* Copyright (c) 2006 David Santo Orcero [e-mail]            */
/* http://www.orcero.org/irbis                                       */
/* OpenMosix is (c) of Moshe Bar http://www.openmosix.com            */
/* Mosix is (c) of prof. Barak http://www.mosix.org                  */
/* Each respective trademark is of its own owner                     */
/* All rights reserved.                                              */
/* This software is distributed under GPL 2                          */

/* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTY IS ASSUMED.        */
/* NO LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING     */
/* FROM THE USE OF THIS SOFTWARE WILL BE ACCEPTED. IT CAN BURN       */
/* YOUR HARD DISK, ERASE ALL YOUR DATA AND BROKE DOWN YOUR           */
/* MICROWAVE OVEN. YOU ARE ADVISED.                                  */

#ifndef _LIBBALANCER_H
#define _LIBBALANCER_H

//#include <linux/types.h>
#include <libmosix.h>

/* This is used to travel to another node */

int om_goto_node (int baseorder, pid_t pid, char *where);


/* migration requests via /proc/nnnnn/om/goto and as baseorder to gotonode */

#define DM_BALANCE_DEFAULT	(-3)	/* perform load balancing by the default algoritm */
#define DM_UNKNOWN		(-2)	/* If you read this, something went wrong */
#define DM_NOBALANCE		(-1)	/* don't perform load balancing */
#define DM_GOBACKHOME    	0	/* just go back home */
#define DM_BALANCE_MOSIX       	1	/* perform load balancing by Amnon Barak algoritm */
#define DM_BALANCE_RR		2	/* perform load balancing by fork round robin algoritm */
#define DM_MANUAL_MIGRATION	3	/* perform a manual migration */


/* constants for status report (/proc/hpc/nodes/IP/status) */

#define	DS_MOSIX_DEF	0x001
#define DS_MOSIX_UP     0x002
#define DS_STAY         0x004
#define DS_LSTAY        0x008
#define DS_BLOCK        0x010
#define DS_QUIET        0x020
#define DS_NOMFS        0x040


/* constants for statictics decay - Amnon Barak algoritm */

#define DADV_CPU        1	/* a pure CPU task */
#define DADV_NOCPU      2	/* a non-computational task */
#define DADV_NODECAY    3	/* task of a uniform mix of rapid changes */
#define DADV_SLOWDECAY  4	/* task may change its nature over long run */
#define DADV_FASTDECAY  5	/* task changes its nature frequently */
#define DADV_OWNDECAY   6	/* task defined its own decay policy */

#define DADV_POLICY     0x00F	/* policy mask */

#define DADV_CLEAR      0x010	/* clear statistics: nature is changing */
#define DADV_INHERIT    0x020	/* children of same nature */
#define DADV_EXEC       0x040	/* maintain advice after exec */
#define DADV_EXECONCE   0x080	/* maintain advice after only the next exec */
#define DADV_NOINHERIT  0x100	/* cancel inheritance */
#define DADV_NOEXEC     0x200	/* cancel advice on exec */
#define DADV_NOEXECONCE 0x400	/* cancel DADV_EXECONCE */
#define DADV_ENQUIRE    0x1000	/* enquire decay policy */

#define DADV_DEFAULT    DADV_SLOWDECAY

#define DECAY_QUOTIENT  1000	/* quotient for the "decay" argument */


/* load information - Amnon Barak algoritm */

struct mosix_info
{
  unsigned long load;
  unsigned short speed;
  unsigned short ncpus;
  unsigned short util;
  unsigned short status;
  int64_t mem;
  int64_t rmem;
  int64_t tmem;
};

/* last round robin migration node - Round Robin algoritm */

extern int lastnode;


#endif