#!/usr/bin/env expect
############################################################################
# Purpose: Test of Slurm functionality
#          Test of CPU affinity support for multi-core systems.
############################################################################
# Copyright (C) 2005-2007 The Regents of the University of California.
# Copyright (C) 2008 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_prog   "test$test_id.prog"
set prompt      "PROMPT:"

if {[test_select_type_params "CR_ONE_TASK_PER_CORE"]} {
	skip "This test is incompatible SelectTypeParameters=CR_ONE_TASK_PER_CORE"
}

#
# Test if CPU affinity support is supported.
#
if {![test_cpu_affinity]} {
	skip "CPU affinity not supported on this system"
}
log_debug "Task affinity plugin installed"

set task_params [string tolower [get_affinity_params]]
if {[string first $task_params "boards"]  != -1 ||
    [string first $task_params "sockets"] != -1 ||
    [string first $task_params "cores"]   != -1} {
	skip "TaskPluginParams=$task_params not supported"
}

set force 0
log_user 0
spawn $scontrol show partition [default_partition]
expect {
	-re "OverSubscribe=FORCE" {
		set force 1
		exp_continue
	}
	eof {
		wait
	}
}
log_user 1
if {$force == 1} {
	skip "This test is not compatible with OverSubscribe=FORCE"
}

# Identify a usable node
set timeout $max_job_delay
set node_name ""
set srun_pid [spawn $srun -N1 --exclusive --verbose $bin_printenv SLURMD_NODENAME]
expect {
	-re "on host ($re_word_str)" {
		set node_name $expect_out(1,string)
		exp_continue
	}
	timeout {
		log_error "srun not responding"
		slow_kill $srun_pid
		set exit_code 1
	}
	eof {
		wait
	}
}
if {[string compare $node_name ""] == 0} {
	fail "Failed to get a usable node name"
}

# Determine how many cpus, sockets, cores, and threads the node has
set num_cputot  0
set num_sockets 0
set num_cores   0
set num_threads 0
log_user 0
spawn $scontrol show node $node_name
expect {
	-re "CoresPerSocket=($number)" {
	   	set num_cores $expect_out(1,string)
		exp_continue
	}
	-re "CPUTot=($number)" {
		set num_cputot $expect_out(1,string)
		exp_continue
	}
	-re "Sockets=($number)" {
		set num_sockets $expect_out(1,string)
		exp_continue
	}
	-re "ThreadsPerCore=($number)" {
	   	set num_threads $expect_out(1,string)
		exp_continue
	}
	eof {
		wait
	}
}
log_user 1
if {$num_cputot == 0 || $num_sockets == 0 || $num_cores == 0 || $num_threads == 0} {
	skip "Could not determine number of CPUs:Sockets:Cores:Threads (saw $num_cputot:$num_sockets:$num_cores:$num_threads)"
}
# Intel KNL nodes with 272 threads generate huge numeric masks
# which are too large for expect integer values to manage
set total_thread_count [expr $num_sockets * $num_cores * $num_threads]
if {$total_thread_count > 64} {
	skip "Total thread count too large for Expect to process ($total_thread_count > 64). Expect unable to work with more than 32-bit numbers"
}
log_debug "Node config: CPUs=$num_cputot Sockets=$num_sockets Cores=$num_cores Threads=$num_threads"
if {$num_cputot < $total_thread_count} {
	skip "CPUs=$num_cputot < (Sockets($num_sockets)*Cores($num_cores)*Threads($num_threads)). Test incompatible with lowered CPUs count"
}

#
# Build a test program to report affinity by task
#
exec $bin_rm -f $file_prog
exec $bin_cc -I$build_dir $file_prog.c -o $file_prog
exec $bin_chmod 700 $file_prog

#
# Create an allocation
#
global env
set env(SLURM_CPU_BIND) "verbose"
set salloc_pid [spawn $salloc -w $node_name -N1 --exclusive --verbose -t2 $bin_bash]
expect {
	-re "Granted job allocation ($number)" {
		set job_id $expect_out(1,string)
		send "export PS1=\"$prompt\"\r"
		exp_continue
	}
	-re "export PS1=\"$prompt\"\r" {
		exp_continue
	}
	timeout {
		slow_kill $salloc_pid
		fail "salloc not responding or failure to recognize prompt"
	}
	-re $prompt {
	}
}
set timeout 1
expect {
	-re $prompt {
		exp_continue
	}
	timeout {
	}
}
set timeout 30

#
# Reading a second prompt is required by some versions of Expect
#
set timeout 1
expect {
	-re $prompt {
		exp_continue
	}
	timeout {
	}
}
set timeout 30

#############################################################################
#
# Run a job step to get allocated processor count and affinity
#
set mask 0
set task_cnt 0
send "$srun -c1 ./$file_prog\r"
expect {
	-re "TASK_ID:($number),MASK:($number)" {
		incr task_cnt
		set mask $expect_out(2,string)
		exp_continue
	}
	-re "error" {
		log_error "Some error occurred"
		set exit_code 1
		exp_continue
	}
	timeout {
		slow_kill $salloc_pid
		fail "salloc not responding or failure to recognize prompt"
	}
	-re "$srun" {
		# just so we don't grab the srun call
		exp_continue;
	}
	-re $prompt
}
#############################################################################
#
# Run a job step with affinity to verify unique masks with min -B 1:1:1
#
set expected_mask [ expr ((1 << $task_cnt) - 1) ]
set task_mask 0
send "$srun -c1 -n $task_cnt -B 1:1:1 ./$file_prog\r"
expect {
	-re "TASK_ID:($number),MASK:($number)" {
		incr task_mask $expect_out(2,string)
		exp_continue
	}
	-re "error" {
		log_error "Some error occurred"
		set exit_code 1
		exp_continue
	}
	timeout {
		log_error "srun (from --allocate) not responding or failure to recognize prompt"
		set exit_code 1
	}
	-re "$srun" {
		# just so we don't grab the srun call
		exp_continue;
	}
	-re $prompt
}
if {$task_mask != $expected_mask} {
	log_error "Affinity mask inconsistency ($task_mask,$expected_mask)"
	set exit_code 1
}

#############################################################################
#
# Run varying number of sockets, verify task count and number of set bits
#
set this_cnt 1
while {$this_cnt <= $num_sockets} {
	set expected_tasks [ expr $this_cnt * $num_cores * $num_threads ]
	set num_tasks 0
	set num_bits  0
	set task_mask 0
	send "$srun -B $this_cnt-$this_cnt:$num_cores:$num_threads ./$file_prog\r"
	expect {
		-re "TASK_ID:($number),MASK:($number)" {
			incr task_mask $expect_out(2,string)
			incr num_tasks 1
			# count number of set bits
			set this_mask $expect_out(2,string)
			while {$this_mask > 0} {
				if {$this_mask & 1} {
					incr num_bits 1
				}
				set this_mask [ expr $this_mask >> 1 ]
			}
			exp_continue
		}
		-re "error" {
			log_error "Some error occurred"
			set exit_code 1
			exp_continue
		}
		timeout {
			log_error "srun (from --allocate) not responding or failure to recognize prompt"
			set exit_code 1
		}
		-re "$srun" {
			# just so we don't grab the srun call
			exp_continue;
		}
		-re $prompt
	}

	if {$num_tasks != $expected_tasks} {
		log_error "Number of tasks inconsistent ($num_tasks,$expected_tasks)"
		set exit_code 1
	}
	if {$num_bits != $expected_tasks} {
		log_error "Number of set bits inconsistent ($num_bits,$expected_tasks)"
		set exit_code 1
	}
	incr this_cnt 1
}


#############################################################################
#
# Run varying number of cores, verify task count and number of set bits
#
set this_cnt 1
while {$this_cnt <= $num_cores} {
	set expected_tasks [ expr $num_sockets * $this_cnt * $num_threads ]
	set num_tasks 0
	set num_bits  0
	set task_mask 0
	send "$srun -B $num_sockets:$this_cnt-$this_cnt:$num_threads ./$file_prog\r"
	expect {
		-re "TASK_ID:($number),MASK:($number)" {
			incr task_mask $expect_out(2,string)
			incr num_tasks 1
			# count number of set bits
			set this_mask $expect_out(2,string)
			while {$this_mask > 0} {
				if {$this_mask & 1} {
					incr num_bits 1
				}
				set this_mask [ expr $this_mask >> 1 ]
			}
			exp_continue
		}
		-re "error" {
			log_error "Some error occurred"
			set exit_code 1
			exp_continue
		}
		timeout {
			log_error "salloc not responding or failure to recognize prompt"
			set exit_code 1
		}
		-re "$srun" {
			# just so we don't grab the srun call
			exp_continue;
		}
		-re $prompt
	}

	if {$num_tasks != $expected_tasks} {
		log_error "Number of tasks inconsistent ($num_tasks,$expected_tasks)"
		set exit_code 1
	}
	if {$num_bits != $expected_tasks} {
		log_error "Number of set bits inconsistent ($num_bits,$expected_tasks)"
		set exit_code 1
	}
	incr this_cnt 1
}


#############################################################################
#
# Run varying number of threads, verify task count and number of set bits
#
set this_cnt 1
while {$this_cnt <= $num_threads} {
	set expected_tasks [ expr $num_sockets * $num_cores * $this_cnt ]
	set num_tasks 0
	set num_bits  0
	set task_mask 0
	send "$srun -B $num_sockets:$num_cores:$this_cnt-$this_cnt ./$file_prog\r"
	expect {
		-re "TASK_ID:($number),MASK:($number)" {
			incr task_mask $expect_out(2,string)
			incr num_tasks 1
			# count number of set bits
			set this_mask $expect_out(2,string)
			while {$this_mask > 0} {
				if {$this_mask & 1} {
					incr num_bits 1
				}
				set this_mask [ expr $this_mask >> 1 ]
			}
			exp_continue
		}
		-re "error" {
			log_error "Some error occurred"
			set exit_code 1
			exp_continue
		}
		timeout {
			log_error "salloc not responding or failure to recognize prompt"
			set exit_code 1
		}
		-re "$srun" {
			# just so we don't grab the srun call
			exp_continue;
		}
		-re $prompt
	}

	if {$num_tasks != $expected_tasks} {
		log_error "Number of tasks inconsistent ($num_tasks,$expected_tasks)"
		set exit_code 1
	}
	if {$num_bits != $expected_tasks} {
		log_error "Number of set bits inconsistent ($num_bits,$expected_tasks)"
		set exit_code 1
	}
	incr this_cnt 1
}

#############################################################################
#
# Run varying cpus per task, verify task count and number of set bits
#
set this_cnt 1
while {$this_cnt <= $task_cnt} {
	set expected_tasks 1
	set num_tasks 0
	set num_bits  0
	set task_mask 0
	send "$srun -c$this_cnt -B 1:1:1 ./$file_prog\r"
	expect {
		-re "TASK_ID:($number),MASK:($number)" {
			incr task_mask $expect_out(2,string)
			incr num_tasks 1
			# count number of set bits
			set this_mask $expect_out(2,string)
			while {$this_mask > 0} {
				if {$this_mask & 1} {
					incr num_bits 1
				}
				set this_mask [ expr $this_mask >> 1 ]
			}
			exp_continue
		}
		-re "error" {
			log_error "Some error occurred"
			set exit_code 1
			exp_continue
		}
		timeout {
			log_error "salloc not responding or failure to recognize prompt"
			set exit_code 1
		}
		-re "$srun" {
			# just so we don't grab the srun call
			exp_continue;
		}
		-re $prompt
	}

	if {$num_tasks != $expected_tasks} {
		log_error "Number of tasks inconsistent ($num_tasks,$expected_tasks)"
		set exit_code 1
	}
	if {$num_bits != $this_cnt} {
		log_error "Number of set bits inconsistent ($num_bits,$this_cnt)"
		set exit_code 1
	}
	incr this_cnt 1
}

#############################################################################
#
# Run a job step with plane distribution to exercise option
# Automatic binding in slurm version 2.0 will bind one task per core
#
set expected_mask [ expr ((1 << $task_cnt) - 1) ]
set task_mask 0
send "$srun -n $task_cnt -m plane=4 ./$file_prog\r"
expect {
	-re "TASK_ID:($number),MASK:($number)" {
		incr task_mask $expect_out(2,string)
		exp_continue
	}
	-re "error" {
		log_error "Some error occurred"
		set exit_code 1
		exp_continue
	}
	timeout {
		log_error "salloc not responding or failure to recognize prompt"
		set exit_code 1
	}
	-re "$srun" {
		# just so we don't grab the srun call
		exp_continue;
	}
	-re $prompt
}

if {$task_mask != $expected_mask} {
	log_error "Affinity mask inconsistency ($task_mask,$expected_mask)"
	set exit_code 1
}

#############################################################################
#
# Terminate the job, free the allocation
#
send "exit\r"
expect {
	-re "error" {
		log_error "Some error occurred"
		set exit_code 1
	}
	timeout {
		log_error "salloc not responding or failure to recognize prompt"
		slow_kill $salloc_pid
		set exit_code 1
	}
	eof {
		wait
	}
}

if {$exit_code == 0} {
	exec $bin_rm -f $file_prog
} elseif { [test_config_overrides] == 1 } {
	exec $bin_rm -f $file_prog
	fail "This test can fail if the node configuration in slurm.conf (sockets, cores, threads) differs from the actual configuration or if using task/cgroup without task/affinity"
} else {
	fail "Test failed due to previous errors (\$exit_code = $exit_code)"
}