#!/usr/bin/env expect
############################################################################
# Purpose: Test of Slurm functionality
#          Test of gres/gpu plugin (if configured).
############################################################################
# Copyright (C) 2010 Lawrence Livermore National Security
# 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.bash"

proc run_gpu_test { gres_cnt } {
	global max_job_delay srun number file_in

	set timeout $max_job_delay
	set bad_format 0
	set devices    0
	set invalid    0
	set srun_pid [spawn $srun -N1 -n1 --gres=gpu:$gres_cnt -t1 ./$file_in]
	expect {
		-re "Unable to allocate" {
			incr invalid
			exp_continue
		}
		-re "CUDA_VISIBLE_DEVICES=($number),($number),($number)" {
			if {$expect_out(1,string) == $expect_out(2,string)} {
				incr bad_format
			} elseif {$expect_out(2,string) == $expect_out(3,string)} {
				incr bad_format
			} elseif {$expect_out(1,string) == $expect_out(3,string)} {
				incr bad_format
			}
			incr devices +3
			exp_continue
		}
		-re "CUDA_VISIBLE_DEVICES=($number),($number)" {
			if {$expect_out(1,string) == $expect_out(2,string)} {
				incr bad_format
			}
			incr devices +2
			exp_continue
		}
		-re "CUDA_VISIBLE_DEVICES=($number)" {
			incr devices
			exp_continue
		}
		-re "CUDA_VISIBLE_DEVICES=" {
			log_warn "This could indicate that gres.conf lacks device files for the GPUs"
			exp_continue
		}
		timeout {
			log_error "srun not responding"
			slow_kill $srun_pid
			set exit_code 1
		}
		eof {
			wait
		}
	}
	if {$invalid != 0} {
		log_warn "Insufficient resources to test $gres_cnt GPUs"
		return 0
	} elseif {$bad_format != 0} {
		log_error "Duplicated device number in GRES allocation"
		return 1
	} elseif {$devices != $gres_cnt} {
		log_error "Expected $gres_cnt GPUs, but was allocated $devices"
		return 1
	}
	return 0
}

proc run_gpu_fail { gres_spec } {
	global max_job_delay srun number exit_code file_in

	set timeout $max_job_delay
	set bad_format 0
	set devices    0
	set invalid    0
	set srun_pid [spawn $srun -N1 -n1 --gres=$gres_spec -t1 ./$file_in]
	expect {
		-re "Invalid" {
			incr invalid
			exp_continue
		}
		timeout {
			log_error "srun not responding"
			slow_kill $srun_pid
			set exit_code 1
		}
		eof {
			wait
		}
	}
	if {$invalid == 0} {
		log_error "Failure to reject job with invalid GRES specification"
		set exit_code 1
	} else {
		log_debug "Error is expected, no worries"
	}
	return
}

#
# Test if gres/gpu is configured
#
set gpu_cnt [get_highest_gres_count 1 "gpu"]
if {$gpu_cnt < 1} {
	skip "This test can not be run without gres/gpu configured"
}
log_debug "GPUs:$gpu_cnt"
#
# Spawn a job via srun to print environment variables and
# check count GPU devices allocated
#
for {set inx 1} {$inx <= $gpu_cnt && $inx <= 3} {incr inx} {
	if {[run_gpu_test $inx ] != 0} {
		incr exit_code
		break
	}
}

#
# Spawn a job via srun with various invalid GRES specifications
#
log_info "Test various invalid GRES specifications"
run_gpu_fail "gpu:"
run_gpu_fail "gpu::"
run_gpu_fail "gpu:tesla:"
run_gpu_fail "gpu:tesla:INVALID_COUNT"
run_gpu_fail "gpu:INVALID_TYPE:"
run_gpu_fail "gpu:INVALID_TYPE:INVALID_COUNT"

if {$exit_code != 0} {
	fail "Test failed due to previous errors (\$exit_code = $exit_code)"
}