//
//         OpenPBS (Portable Batch System) v2.3 Software License
// 
// Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
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// 
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// This license covers use of the OpenPBS v2.3 software (the "Software") at
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//
//
// loadave4.basl: A simple scheduler to run up to 3 jobs if the load average
//		  is less than 2.0 and the job cput is less than 60 seconds.
//		  This is for each of the server hosts it knows about.
//
// Environment: Many Server / Many CNode 
//
// Configuration file:
//		$serverhost host1 port1
//		$serverhost host2 port2	
//		...
//		$momhost host1 port1
//		$momhost host2 port2
//		...
// NOTE: This is the same as loadave3.basl except instead of using the
//       assist function, "ServerJobsGet()" to get to the jobs,
//       "QueJobsGet()" is used instead.


// **************************************************************************
//
// User-defined Functions
//
// **************************************************************************

Int JobCpuTimeReqGet(Job job) {
        Int cput;

        cput = JobIntResReqGet(job, "cput");
        return(cput);
}

CNode findCNodeByName(String host_name)
{
	Set CNode	exec_hosts;
	CNode		n;
	
	// get the nodes to the system via the configuration file
	exec_hosts = AllNodesGet();
	foreach( n in exec_hosts ) {
		if( CNodeNameGet(n) EQ host_name ) {
			return(n);
		}
	}
	return(NOCNODE);
}

// **************************************************************************
//
// Global variable declarations
//
// **************************************************************************

Int nrun;

// **************************************************************************
//
// main scheduling code
//
// **************************************************************************
sched_main()
{
	Set Server serv_hosts;
	Server	h;

	CNode	node;
	
	Set Que queues;
	Que	q;
	Que	q1;
	Que	q2;

	Set Job	jobs;
	Job	j;

	String	host_name;

	Float	loadave;

	// get all servers known to the system
	serv_hosts = AllServersGet();


	foreach( h in serv_hosts ) {
	  
	   nrun = 0;

	   host_name = ServerInetAddrGet(h);
	   node = findCNodeByName(host_name);

	   loadave = CNodeLoadAveGet(node);	
	   if( loadave GE 2.0 OR loadave LT 0.0 ) {
		continue;
	   }

	   queues = ServerQueuesGet(h);
	   foreach( q in queues ) {

		if( QueStateGet(q) NEQ SCHED_ENABLED ) {
			continue;
		}

		// CONDITION: Consider jobs only that are not running with cput
		// requirement < 60
		q1 = QueFilter(q, JobStateGet, OP_NEQ, RUNNING);
		q2 = QueFilter(q1, JobCpuTimeReqGet, OP_LT, 60);
		jobs = QueJobsGet(q2);

		foreach( j in jobs ) {

		      // run job syncronously
		      if( JobAction(j, SYNCRUN, NULLSTR) EQ SUCCESS ) {
				nrun=nrun+1;
	              }
	              if( nrun GT 2 ) {
				break;
	              }

		} // foreach jobs

		if( nrun GT 2 ) {
	                break;
		}

	   } // foreach q

        } // foreach h
}