#!/usr/bin/env expect
############################################################################
# Purpose: Test of Slurm functionality
#          Test exclusive resource allocation for a step (--exclusive option).
############################################################################
# Copyright (C) 2007 The Regents of the University of California.
# Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
# Written by Morris Jette <jette1@llnl.gov>
# CODE-OCEC-09-009. All rights reserved.
#
# This file is part of Slurm, a resource management program.
# For details, see <https://slurm.schedmd.com/>.
# Please also read the included file: DISCLAIMER.
#
# Slurm 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.
#
# Slurm 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 Slurm; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
############################################################################
source ./globals

set exit_code        0
set file_in         "test$test_id.input"
set file_in2        "test$test_id.input2"
set file_out        "test$test_id.output"
set file_out2       "test$test_id.output2"
set job_id           0
set gpu_tot          0
set job_tres_cnt     0

if {[test_front_end]} {
    skip "This test is incompatible with front-end systems"
}

set node_name [get_nodes_by_request "--gres=gpu:2 -n1 -t1"]
if { [llength $node_name] != 1 } {
	skip "This test need to be able to submit jobs with at least --gres=gpu:2"
}
set gpu_tot [dict get [get_gres_count "gpu" $node_name] $node_name]

#
# Delete left-over input script
# Build input script file
# Run one more step than allocated CPUs and make sure it waits
# The "sleep 4" is meant to ensure the earlier job steps start first
#
exec $bin_rm -f $file_in $file_in2 $file_out $file_out2
make_bash_script $file_in "
  echo tasks_per_node=\$SLURM_TASKS_PER_NODE
  if \[ \$SLURM_TASKS_PER_NODE -gt 32 \]; then
    sleep_secs=45
  else
    sleep_secs=10
  fi
  inx=0
  while \[ \$inx -lt \$SLURM_TASKS_PER_NODE \]
  do
    $srun --exclusive -n1 $bin_sleep \$sleep_secs &
    inx=\$((inx+1))
  done
  $bin_sleep 4
  $srun -v --exclusive -n1 ./$file_in2 &
  wait
"
make_bash_script $file_in2 "
  $scontrol show steps
"

#
# Spawn a job via sbatch
#
spawn $sbatch -N1 -t2 --gres=craynetwork:0 --output=$file_out ./$file_in
expect {
	-re "Submitted batch job ($number)" {
		set job_id $expect_out(1,string)
		exp_continue
	}
	timeout {
		log_error "sbatch not responding"
		set exit_code 1
		exp_continue
	}
	eof {
		wait
	}
}
if { $job_id == 0 } {
	fail "Failed to submit job"
}

#
# Wait for job to complete
#
if {[wait_for_job $job_id "DONE"] != 0} {
	log_error "Waiting for job to complete"
	cancel_job $job_id
	set exit_code 1
}

#
# Check for desired output
#
if {[wait_for_file $file_out] != 0} {
	fail "Output file $file_out is missing"
}
set matches 0
set tasks_per_node 0
spawn $bin_cat $file_out
expect {
	-re "tasks_per_node=($number)" {
		set tasks_per_node $expect_out(1,string)
	}
	-re "StepId=$job_id" {
		incr matches
		exp_continue
	}
	eof {
		wait
	}
}

if { $matches > $tasks_per_node } {
	log_error "Problem with exclusive resource allocation for step ($matches > $tasks_per_node)"
	set exit_code 1
}

if {$exit_code == 0} {
	log_info "So far, so good. Trying with --immediate option"
} else {
	fail "Test failed due to previous errors (\$exit_code = $exit_code)"
}

#
# Delete left-over input script
# Build another input script file
# Run one more step than allocated CPUs with immediate option and make aborts
# The "sleep" is meant to ensure the earlier job steps start first
#
exec $bin_rm -f $file_in $file_out
make_bash_script $file_in "
  inx=0
  if \[ \$SLURM_TASKS_PER_NODE -gt 32 \]; then
    sleep_secs=45
  else
    sleep_secs=10
  fi
  while \[ \$inx -lt \$SLURM_TASKS_PER_NODE \]
  do
    $srun --exclusive -n1 --mem=0 $bin_sleep \$sleep_secs &
    inx=\$((inx+1))
  done
  $bin_sleep 4
  $srun -v --exclusive -n1 --mem=0 --immediate ./$file_in2 &
  wait
"

#
# Spawn a job via sbatch
#
spawn $sbatch -N1 -t2 --gres=craynetwork:0 --output=$file_out2 ./$file_in
expect {
	-re "Submitted batch job ($number)" {
		set job_id $expect_out(1,string)
		exp_continue
	}
	timeout {
		log_error "sbatch not responding"
		set exit_code 1
		exp_continue
	}
	eof {
		wait
	}
}
if { $job_id == 0 } {
	fail "Failed to submit job"
}

#
# Wait for job to complete
#
if {[wait_for_job $job_id "DONE"] != 0} {
	log_error "Waiting for job to complete"
	cancel_job $job_id
	set exit_code 1
}

#
# Check for desired output
#
if {[wait_for_file $file_out2] != 0} {
	fail "Output file $file_out2 is missing"
}
set matches 0
spawn $bin_cat $file_out2
expect {
	-re "StepId=$job_id" {
		log_error "Problem --exclusive and --immediate option for step"
		set exit_code 1
		exp_continue
	}
	-re "Unable to create " {
		log_debug "This error was expected, no worries"
		incr matches
		exp_continue
	}
	eof {
		wait
	}
}

if { $matches != 1 } {
	log_error "Problem --exclusive and --immediate option for step ($matches != 1)"
	set exit_code 1
}

#
# Verify that all GPUs are allocated with the --exclusive flag
#
set job_id 0

spawn $srun -N1 -w $node_name --gres=gpu --exclusive $bin_printenv SLURM_JOBID
expect {
	-re "($number)" {
		set job_id $expect_out(1,string)
		exp_continue
	}
	timeout {
		log_error "srun not responding\n"
		set exit_code 1
	}
	eof {
		wait
	}
}

set job_gpu_cnt [get_job_gpu_cnt $job_id]

if {$gpu_tot != $job_gpu_cnt} {
	log_error "Job didn't allocate all GPUs ($gpu_tot != $job_gpu_cnt)"
	set exit_code 1
} else {
	log_info "Node GPU count matches Job GPU count ($gpu_tot == $job_gpu_cnt)"
}

if {[wait_for_job $job_id "DONE"] != 0} {
	log_error "job wasn't able to complete\n"
	cancel_job $job_id
	set exit_code 1
}

if {$exit_code == 0} {
	exec $bin_rm -f $file_in $file_in2 $file_out $file_out2
} else {
	fail "Test failed due to previous errors (\$exit_code = $exit_code)"
}