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
*    service, proper attribution must be given; see www.OpenPBS.org/credit.html
* 
* 2. Redistribution in any form is only permitted for non-commercial,
*    non-profit purposes.  There can be no charge for the Software or any
*    software incorporating the Software.  Further, there can be no
*    expectation of revenue generated as a consequence of redistributing
*    the Software.
* 
* 3. Any Redistribution of source code must retain the above copyright notice
*    and the acknowledgment contained in paragraph 6, this list of conditions
*    and the disclaimer contained in paragraph 7.
* 
* 4. Any Redistribution in binary form must reproduce the above copyright
*    notice and the acknowledgment contained in paragraph 6, this list of
*    conditions and the disclaimer contained in paragraph 7 in the
*    documentation and/or other materials provided with the distribution.
* 
* 5. Redistributions in any form must be accompanied by information on how to
*    obtain complete source code for the OpenPBS software and any
*    modifications and/or additions to the OpenPBS software.  The source code
*    must either be included in the distribution or be available for no more
*    than the cost of distribution plus a nominal fee, and all modifications
*    and additions to the Software must be freely redistributable by any party
*    (including Licensor) without restriction.
* 
* 6. All advertising materials mentioning features or use of the Software must
*    display the following acknowledgment:
* 
*     "This product includes software developed by NASA Ames Research Center,
*     Lawrence Livermore National Laboratory, and Veridian Information 
*     Solutions, Inc.
*     Visit www.OpenPBS.org for OpenPBS software support,
*     products, and information."
* 
* 7. DISCLAIMER OF WARRANTY
* 
* THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
* ARE EXPRESSLY DISCLAIMED.
* 
* IN NO EVENT SHALL VERIDIAN CORPORATION, ITS AFFILIATED COMPANIES, OR THE
* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/

/*
 * The Digital Unix Port was developed and provided by
 * Dirk Grunwald of the Department of Computer Science at
 * the University of Colorado at Boulder
 */
#include <pbs_config.h>   /* the master config generated by configure */

#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <malloc.h>
#include <errno.h>
#include <string.h>
#include <pwd.h>
#include <nlist.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/procfs.h>
#include <sys/proc.h>
#include <sys/resource.h>

#include <stdlib.h>
#include <sys/table.h>
#include <sys/sysinfo.h>
#include <machine/hal_sysinfo.h>
#include <machine/rpb.h>
#include <machine/cpuconf.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 Digital Unix machine
**
**	Resources known by this code:
**		cput		cpu time for a pid or job
**		mem		memory size for a pid or job in KB
**		resi		resident memory size for a pid or job in KB
**		sessions	list of sessions in the system
**		pids		list of pids in a job
**		nsessions	number of sessions in the system
**		nusers		number of users in the system
**		ncpus		number of cpus
**		physmem		physical memory size in KB
**		size		size of a file or filesystem in KB
**		idletime	seconds of idle time
**		walltime	wall clock time for a pid
**		loadave		current load average
**		cpuclock	clock rate of the CPU
**		cputype		cpu type
**		platform	platform name (as string)
*/

static char ident[] = "@(#) digitalunix/$RCSfile: mom_mach.c,v $ $Revision: 2.8.4.5 $";

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

#ifndef	MAX
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif	/* MAX */

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

/*
** local functions and data
*/
static char	*resi		A_((struct rm_attribute *attrib));
static char	*physmem	A_((struct rm_attribute *attrib));
static char	*ncpus		A_((struct rm_attribute *attrib));
static char	*cpuspeed	A_((struct rm_attribute *attrib));
static char	*cputype	A_((struct rm_attribute *attrib));
static char	*platform	A_((struct rm_attribute *attrib));
static char	*walltime	A_((struct rm_attribute *attrib));

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

char		procfs[] = "/proc";
char		procfmts[] = "/proc/%s";
char		procfmtd[] = "/proc/%05.5d";
DIR		*pdir;
extern	char	*ret_string;
extern	int	ret_size;
time_t		wait_time = 10;
int		nproc = 0;
int		max_proc = 0;
prstatus_t	*proc_status = NULL;
prpsinfo_t	*proc_info = NULL;
static long	 page_size;

#define	TBL_INC	20

extern	struct	pbs_err_to_txt	pbs_err_to_txt[];
extern	time_t			time_now;

extern	char	extra_parm[];
extern	char	no_parm[];
char		no_count[] = "count not found";

/*
** local resource array
*/
struct	config	dependent_config[] = {
	{ "resi",	resi },
	{ "physmem",	physmem },
	{ "ncpus",	ncpus },
	{ "loadave",	loadave },
	{ "cpuspeed",	cpuspeed },
	{ "cputype",	cputype },
	{ "platform",	platform },
	{ "walltime",	walltime },
	{ NULL,		nullproc },
};
	
/*
**	Don't need any periodic procsessing.
*/
void
end_proc()
{
	return;
}

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

	page_size = sysconf(_SC_PAGESIZE);

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

	return;
}

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

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

/*
 * 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);
}

/*
 * Time decoding macro.  Accepts a timestruc_t pointer.  Returns unsigned long
 * time in seconds.
 */

#define tv(val) (ulong)((val).tv_sec + ((val).tv_nsec + 500000000)/1000000000)

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_sum";
	ulong			cputime, addtime;
	int			i;
	int			nps = 0;
	prstatus_t		*ps;
	prpsinfo_t		*pi;

	cputime = 0.0;
	for (i=0; i<nproc; i++) {
		pi = &proc_info[i];

		if (!injob(pjob, pi->pr_sid))
			continue;
		nps++;
		if (pi->pr_state == SZOMB) {
			cputime += tv(pi->pr_time);
			DBPRT(("%s: ses %d pid %d (zombie) cputime %d\n",
					id, pi->pr_sid, pi->pr_pid, cputime))
			continue;
		}

		ps = &proc_status[i];
		addtime = tv(ps->pr_utime) + tv(ps->pr_stime) +
			tv(ps->pr_cutime) + tv(ps->pr_cstime);

		cputime += addtime;
		DBPRT(("%s: ses %d pid %d cputime %d\n",
				id, pi->pr_sid, ps->pr_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 overcput_proc(pjob, limit)
    job			*pjob;
    unsigned long	limit;
{
	char		*id = "overcput_proc";
	ulong		memsize;
	ulong		cputime;
	int		i;
	prstatus_t	*ps;

	memsize = 0;
	for (i=0; i<nproc; i++) {
		ps = &proc_status[i];

		if (!injob(pjob, ps->pr_sid))
			continue;
		cputime = (ulong)(cputfactor * (double)(
			tv(ps->pr_utime) + tv(ps->pr_stime) +
			tv(ps->pr_cutime) + tv(ps->pr_cstime)));
		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 tasks within the session.
 */
static unsigned long mem_sum(pjob)
    job			*pjob;
{
	char		*id="mem_sum";
	ulong		memsize;
	int		i;
	prpsinfo_t	*pi;

	memsize = 0;
	for (i=0; i<nproc; i++) {
		pi = &proc_info[i];

		if (!injob(pjob, pi->pr_sid))
			continue;
                memsize += pi->pr_size * page_size;
        }

	return (memsize);
}

/*
 * Internal session mem (workingset) size function.
 */
static unsigned long resi_sum(pjob)
    job			*pjob;
{
	char		*id="resi_sum";
	ulong		resisize;
	int		i;
	prpsinfo_t	*pi;

	resisize = 0;
	for (i=0; i<nproc; i++) {
		pi = &proc_info[i];

		if (!injob(pjob, pi->pr_sid))
                        continue;

                resisize += pi->pr_rssize * page_size;
        }

	return (resisize);
}

extern char *msg_momsetlim;

/*
 * Internal error routine
 */
int error(string, value)
    char	*string;
    int		value;
{
	int		i = 0;
	char		*message;

	assert(string != NULL);
	assert(*string != '\0');
	assert(value > PBSE_);			/* minimum PBS error number */
	assert(value <= PBSE_NOSYNCMSTR);	/* maximum PBS error number */
	assert(pbs_err_to_txt[i].err_no != 0);

	do {
		if (pbs_err_to_txt[i].err_no == value)
			break;
	} while (pbs_err_to_txt[++i].err_no != 0);

	assert(pbs_err_to_txt[i].err_txt != NULL);
	message = *pbs_err_to_txt[i].err_txt;
	assert(message != NULL);
	assert(*message != '\0');
	(void)fprintf(stderr, msg_momsetlim, string, message);
	(void)fflush(stderr);

	return (value);
}

/*
 * Establish system-enforced limits for the job.
 *
 *	Run through the resource list, checking the values for all items
 *	we recognize.
 *
 *	If set_mode is SET_LIMIT_SET, then also set hard limits for the
 *	system enforced limits (not-polled).
 *	If anything goes wrong with the process, return a PBS error code
 *	and print a message on standard error.  A zero-length resource list
 *	is not an error.
 *
 *	If set_mode is SET_LIMIT_SET the entry conditions are:
 *	    1.	MOM has already forked, and we are called from the child.
 *	    2.	The child is still running as root.
 *	    3.  Standard error is open to the user's file.
 *
 *	If set_mode is SET_LIMIT_ALTER, we are beening called to modify
 *	existing limits.  Cannot alter those set by setrlimit (kernel)
 *	because we are the wrong process.  
 */
int mom_set_limits(pjob, set_mode)
    job			*pjob;
    int			 set_mode;	/* SET_LIMIT_SET or SET_LIMIT_ALTER */
{
	char		*id = "mom_set_limits";
	char		*pname;
	int		retval;
	unsigned long	value;	/* place in which to build resource value */
	resource	*pres;
       	struct rlimit	reslim;
	unsigned long	mem_limit  = 0;

	DBPRT(("%s: entered\n", id))
	assert(pjob != NULL);
	assert(pjob->ji_wattr[(int)JOB_ATR_resource].at_type == ATR_TYPE_RESC);
	pres = (resource *)
	    GET_NEXT(pjob->ji_wattr[(int)JOB_ATR_resource].at_val.at_list);

/*
 * Cycle through all the resource specifications,
 * setting limits appropriately.
 */

	while (pres != NULL) {
		assert(pres->rs_defin != NULL);
		pname = pres->rs_defin->rs_name;
		assert(pname != NULL);
		assert(*pname != '\0');

		if (strcmp(pname, "cput") == 0) {
			/* cpu time - check, if less than pcput use it */
			retval = gettime(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
		} else if (strcmp(pname, "pcput") == 0) {
			/* process cpu time - set */
			retval = gettime(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
			reslim.rlim_cur = reslim.rlim_max = 
				(unsigned long)((double)value / cputfactor);
			if (setrlimit(RLIMIT_CPU, &reslim) < 0)
	        		return (error("RLIMIT_CPU", PBSE_SYSTEM));
		} else if (strcmp(pname, "file") == 0) {	/* set */
			if (set_mode == SET_LIMIT_SET)  {
			    retval = getsize(pres, &value);
			    if (retval != PBSE_NONE)
			        return (error(pname, retval));
			    if (value > INT_MAX)
			        return (error(pname, PBSE_BADATVAL));
			    reslim.rlim_cur = reslim.rlim_max = value;
			    if (setrlimit(RLIMIT_FSIZE, &reslim) < 0)
			        return (error(pname, PBSE_SYSTEM));
			}
		} else if (strcmp(pname, "vmem") == 0) {	/* check */
			retval = getsize(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
			if ((mem_limit == 0) || (value < mem_limit))
				mem_limit = value;
		} else if (strcmp(pname, "pvmem") == 0) {	/* set */
			if (set_mode == SET_LIMIT_SET)  {
			    retval = getsize(pres, &value);
			    if (retval != PBSE_NONE)
			        return (error(pname, retval));
			    if (value > INT_MAX)
			        return (error(pname, PBSE_BADATVAL));
			if ((mem_limit == 0) || (value < mem_limit))
				mem_limit = value;
			}
		} else if (strcmp(pname, "mem") == 0) {		/* ignore */
		} else if (strcmp(pname, "walltime") == 0) {	/* Check */
			retval = gettime(pres, &value);
			if (retval != PBSE_NONE)
			        return (error(pname, retval));
		} else if (strcmp(pname, "nice") == 0) {	/* set nice */
			if (set_mode == SET_LIMIT_SET)  {
			    errno = 0;
			    if ((nice((int)pres->rs_value.at_val.at_long) == -1)
				&& (errno != 0))
				return (error(pname, PBSE_BADATVAL));
			}
		} else if ((pres->rs_defin->rs_flags & ATR_DFLAG_RMOMIG) == 0)
			/* don't recognize and not marked as ignore by mom */
			return (error(pname, PBSE_UNKRESC));
		pres = (resource *)GET_NEXT(pres->rs_link);
	}
	if (set_mode == SET_LIMIT_SET)  {
	    /* if either of vmem or pvmem was given, set sys limit to lesser */
	    if (mem_limit != 0) {
		reslim.rlim_cur = reslim.rlim_max = mem_limit;
		if (setrlimit(RLIMIT_VMEM, &reslim) < 0)
			return (error("RLIMIT_VMEM", PBSE_SYSTEM));
	    }
	}
	return (PBSE_NONE);
}
/*
 * State whether MOM main loop has to poll this job to determine if some
 * limits are being exceeded.
 *
 *	Sets flag TRUE if polling is necessary, FALSE otherwise.  Actual
 *	polling is done using the mom_over_limit machine-dependent function.
 */

int mom_do_poll(pjob)
    job			*pjob;
{
	char		*id = "mom_do_poll";
	char		*pname;
	resource	*pres;

	DBPRT(("%s: entered\n", id))