mom_mach.c

openPBS的开放源代码

/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
* All rights reserved.
* 
* ---------------------------------------------------------------------------
* For a license to use or redistribute the OpenPBS software under conditions
* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
*    www.OpenPBS.org  [phone]                  [e-mail]
*                        877 902-4PBS (US toll-free)
* ---------------------------------------------------------------------------
* 
* This license covers use of the OpenPBS v2.3 software (the "Software") at
* your site or location, and, for certain users, redistribution of the
* Software to other sites and locations.  Use and redistribution of
* OpenPBS v2.3 in source and binary forms, with or without modification,
* are permitted provided that all of the following conditions are met.
* After December 31, 2001, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
*    provided a current software registration is on file at www.OpenPBS.org.
*    If use of this software contributes to a publication, product, or
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* 
* 2. Redistribution in any form is only permitted for non-commercial,
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*    software incorporating the Software.  Further, there can be no
*    expectation of revenue generated as a consequence of redistributing
*    the Software.
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* 3. Any Redistribution of source code must retain the above copyright notice
*    and the acknowledgment contained in paragraph 6, this list of conditions
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* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR INDIRECT,
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* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/

#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <errno.h>
#include <strings.h>
#include <pwd.h>
#include <mntent.h>
#include <asm/types.h>
#include <linux/quota.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/procfs.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/vfs.h>
#include <sys/sysmacros.h>
#include <sys/resource.h>
#include <syscall.h>

#include "pbs_error.h"
#include "portability.h"
#include "list_link.h"
#include "server_limits.h"
#include "attribute.h"
#include "resource.h"
#include "job.h"
#include "log.h"
#include "mom_mach.h"
#include "resmon.h"
#include "../rm_dep.h"


/*
**	System dependent code to gather information for the resource
**	monitor for a Linux i386 machine.
**
**	Resources known by this code:
**		cput		cpu time for a pid or session
**		mem		memory size for a pid or session in KB
**		resi		resident memory size for a pid or session in KB
**		sessions	list of sessions in the system
**		pids		list of pids in a session
**		nsessions	number of sessions in the system
**		nusers		number of users in the system
**		totmem		total memory size in KB
**		availmem	available memory size in KB
**		ncpus		number of cpus
**		physmem		physical memory size in KB
**		size		size of a file or filesystem
**		idletime	seconds of idle time
**		walltime	wall clock time for a pid
**		loadave		current load average
**		quota		quota information (sizes in kb)
*/

static char ident[] = "@(#) $RCSfile: mom_mach.c,v $ $Revision: 2.12.4.7 $";

#ifndef TRUE
#define FALSE	0
#define TRUE	1
#endif	/* TRUE */

static	char    procfs[] = "/proc";
static	DIR	*pdir = NULL;
static	int	pagesize;

extern	char	*ret_string;
extern	char	extra_parm[];
extern	char	no_parm[];

extern	struct	pbs_err_to_txt	pbs_err_to_txt[];
extern	time_t			time_now;

/*
** external functions and data
*/
extern	struct	config		*search A_((struct config *, char *));
extern	struct	rm_attribute	*momgetattr A_((char *));
extern	int			rm_errno;
extern	double	cputfactor;
extern	double	wallfactor;

/*
** local functions and data
*/
static char	*resi		A_((struct rm_attribute *attrib));
static char	*totmem		A_((struct rm_attribute *attrib));
static char	*availmem	A_((struct rm_attribute *attrib));
static char	*physmem	A_((struct rm_attribute *attrib));
static char	*ncpus		A_((struct rm_attribute *attrib));
static char	*walltime	A_((struct rm_attribute *attrib));
static char	*quota		A_((struct rm_attribute *attrib));

extern char	*loadave	A_((struct rm_attribute *attrib));
extern char	*nullproc	A_((struct rm_attribute *attrib));

time_t	wait_time = 10;

typedef	struct	proc_mem  {
        unsigned	total;
        unsigned	used;
        unsigned	free;
} proc_mem_t;

/*
** local resource array
*/
struct	config	dependent_config[] = {
	{ "resi",	resi },
	{ "totmem",	totmem },
	{ "availmem",	availmem },
	{ "physmem",	physmem },
	{ "ncpus",	ncpus },
	{ "loadave",	loadave },
	{ "walltime",	walltime },
	{ "quota",	quota },
	{ NULL,		nullproc },
};

unsigned linux_time = 0;
/*
 * support routine for getting system time -- sets linux_time
 */
void	proc_get_btime()
{
	FILE	*fp;
	char	label[256];
	

	if ((fp = fopen("/proc/stat", "r")) == NULL)  
		return;

	while (!feof(fp))  {
		fscanf(fp, "%s", label);
		if (strcmp(label, "btime"))  {
			fscanf(fp, "%*[^\n]%*c");
		}  else  {
			fscanf(fp, "%u", &linux_time);
			fclose(fp);
			return;
		}
	}
	
	fclose(fp);
	return;
}

static	char	stat_str[] = "%d (%[^)]) %c %*d %*d %d %*d %*d %u %*u \
%*u %*u %*u %d %d %d %d %*d %*d %*u %*u %u %u %u %*u %*u \
%*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u";

/*
**	Convert jiffies to seconds.
*/
#define	JTOS(x)	 x = (x + CLK_TCK/2) / CLK_TCK;

/*
 * Linux /proc status routine.
 *
 *	Returns a pointer to a malloc'd proc_stat_t structure given
 *	a process number, or NULL if there is an error.  Takes the
 *	place of the ioctl call PIOCSTATUS in the irix imp of mom_mach.c
 *
 */
proc_stat_t	*get_proc_stat(pid)
	int	pid;
{
	static	proc_stat_t	ps;
	static	char		path[1024];
	FILE			*fd;
	unsigned		jiffies;
	struct 	stat		sb;

	sprintf(path, "/proc/%d/stat", pid);

	if ((fd = fopen(path, "r")) == NULL)
		return(NULL);

	if (fscanf(fd, stat_str, &ps.pid, path, &ps.state,
			&ps.session, &ps.flags, &ps.utime, &ps.stime, 
			&ps.cutime, &ps.cstime, &jiffies, &ps.vsize,
			&ps.rss) != 12)  {
		fclose(fd);
		return(NULL);
	}
	if (fstat(fileno(fd), &sb) == -1)  {
		fclose(fd);
		return(NULL);
	}  else  {
		ps.uid = sb.st_uid;
	}


	ps.start_time = linux_time + (jiffies / 100);
	ps.name = path;

	JTOS(ps.utime)
	JTOS(ps.stime)
	JTOS(ps.cutime)
	JTOS(ps.cstime)
	
	fclose(fd);
	return(&ps);
}


proc_mem_t      *get_proc_mem()
{
        static	proc_mem_t	mm;
        FILE    	*fp;
        unsigned        m_tot, m_use, m_free;
        unsigned        s_tot, s_use, s_free;

        
        if ((fp = fopen("/proc/meminfo", "r")) == NULL)
                return(NULL);

        fscanf(fp, "%*[^\n]%*c");       /* lose the text header */;
        fscanf(fp, "%*s %u %u %u %*[^\n]%*c", &m_tot, &m_use, &m_free);
        fscanf(fp, "%*s %u %u %u %*[^\n]%*c", &s_tot, &s_use, &s_free);
 
        mm.total = m_tot + s_tot;
        mm.used = m_use + s_use;
        mm.free = m_free + s_free;

	fclose(fp);
        return(&mm);
}

void
dep_initialize()
{
	char	*id = "dep_initialize";

	pagesize = getpagesize();

	if ((pdir = opendir(procfs)) == NULL) {
		log_err(errno, id, "opendir");
		return;
	}

	proc_get_btime();

	return;
}

void
dep_cleanup()
{
	char	*id = "dep_cleanup";

	log_record(PBSEVENT_SYSTEM, 0, id, "dependent cleanup");
	if (pdir) {
		closedir(pdir);
		pdir = NULL;
	}
}

/*
**	Don't need any periodic procsessing.
*/
void
end_proc()
{
	return;
}


/*
 * Internal size decoding routine.
 *
 *	Accepts a resource pointer and a pointer to the unsigned long integer
 *	to receive the decoded value.  It returns a PBS error code, and the
 *	decoded value in the unsigned long integer.
 *
 *		sizeof(word) = sizeof(int)
 */

static int getsize(pres, ret)
    resource		*pres;
    unsigned long	*ret;
{
	unsigned long	value;

	if (pres->rs_value.at_type != ATR_TYPE_SIZE)
		return (PBSE_ATTRTYPE);
	value = pres->rs_value.at_val.at_size.atsv_num;
	if (pres->rs_value.at_val.at_size.atsv_units ==
	    ATR_SV_WORDSZ) {
		if (value > ULONG_MAX / sizeof(int))
			return (PBSE_BADATVAL);
		value *= sizeof(int);
	}
	if (value > ULONG_MAX >>
	    pres->rs_value.at_val.at_size.atsv_shift)
	        return (PBSE_BADATVAL);
	*ret = value << pres->rs_value.at_val.at_size.atsv_shift;

	return (PBSE_NONE);
}

/*
 * Internal time decoding routine.
 *
 *	Accepts a resource pointer and a pointer to the unsigned long integer
 *	to receive the decoded value.  It returns a PBS error code, and the
 *	decoded value of time in seconds in the unsigned long integer.
 */

static int gettime(pres, ret)
    resource		*pres;
    unsigned long	*ret;
{

	if (pres->rs_value.at_type != ATR_TYPE_LONG)
		return (PBSE_ATTRTYPE);
	if (pres->rs_value.at_val.at_long < 0)
	        return (PBSE_BADATVAL);
	*ret = pres->rs_value.at_val.at_long;

	return (PBSE_NONE);
}

static
int
injob(pjob, sid)
    job		*pjob;
    pid_t	sid;
{
	task    *ptask;

	for (ptask = (task *)GET_NEXT(pjob->ji_tasks);
			ptask;
			ptask = (task *)GET_NEXT(ptask->ti_jobtask)) {
		if (ptask->ti_qs.ti_sid <= 1)
			continue;
		if (ptask->ti_qs.ti_sid == sid)
			return TRUE;
	}
	return FALSE;
}

/*
 * Internal session cpu time decoding routine.
 *
 *	Accepts a job pointer.  Returns the sum of all cpu time
 *	consumed for all tasks executed by the job, in seconds,
 *	adjusted by cputfactor.
 */
static unsigned long cput_sum(pjob)
    job		*pjob;
{
	char			*id = "cput_ses";
	int			fd;
	struct dirent		*dent;
	ulong			cputime;
	int			nps = 0;
	proc_stat_t		*ps;

	cputime = 0.0;
	rewinddir(pdir);
	while ((dent = readdir(pdir)) != NULL) {
		if (!isdigit(dent->d_name[0]))
			continue;

		if ((ps = get_proc_stat(atoi(dent->d_name))) == NULL)  {
			if (errno != ENOENT) {
				sprintf(log_buffer,
					"%s: get_proc_stat", dent->d_name);
				log_err(errno, id, log_buffer);
			}
			continue;
		}

		if (!injob(pjob, ps->session))
			continue;

		nps++;
		cputime += (ps->utime + ps->stime + ps->cutime + ps->cstime);
		DBPRT(("%s: ses %d pid %d cputime %d\n",
				id, ps->session, ps->pid, cputime));
	}

	if (nps == 0)
		pjob->ji_flags |= MOM_NO_PROC;

	return ((unsigned long)((double)cputime * cputfactor));
}

/*
 * Return TRUE if any process in the job is over limit for cputime usage.
 */
static int overcpu_proc(pjob, limit)
    job			*pjob;
    unsigned long	limit;
{
	char		*id = "overcpu_proc";
	ulong		memsize;
	int		fd;
	struct dirent	*dent;
	ulong		cputime;
	proc_stat_t	*ps;

	memsize = 0;
	rewinddir(pdir);
	while ((dent = readdir(pdir)) != NULL) {
		if (!isdigit(dent->d_name[0]))
			continue;

		if ((ps = get_proc_stat(atoi(dent->d_name))) == NULL)  {
			if (errno != ENOENT) {
				sprintf(log_buffer,
					"%s: get_proc_stat", dent->d_name);
				log_err(errno, id, log_buffer);
			}
			continue;
		}

		if (!injob(pjob, ps->session))
			continue;

		cputime = (ulong)((double)(ps->cutime + ps->cstime)*cputfactor);
		if (cputime > limit)
			return (TRUE);
        }

	return (FALSE);
}

/*
 * Internal session memory usage function.
 *
 *	Returns the total number of bytes of address
 *	space consumed by all current processes within the job.
 */
static unsigned long mem_sum(pjob)
    job			*pjob;
{
	char			*id="mem_sum";
	struct dirent		*dent;
	char			procname[100];
	int			num, i;
	unsigned long		segadd;
	proc_stat_t		*ps;

	segadd = 0;
	rewinddir(pdir);

	while ((dent = readdir(pdir)) != NULL) {
		if (!isdigit(dent->d_name[0]))
			continue;

		if ((ps = get_proc_stat(atoi(dent->d_name))) == NULL) {
			if (errno != ENOENT) {
				sprintf(log_buffer,
					"%s: get_proc_stat", dent->d_name);
				log_err(errno, id, log_buffer);
			}
			continue;
		}

		if (!injob(pjob, ps->session))
			continue;