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92 lines
2.5 KiB
Tcl
92 lines
2.5 KiB
Tcl
# See the file LICENSE for redistribution information.
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#
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# Copyright (c) 1996-2002
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# Sleepycat Software. All rights reserved.
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#
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# $Id: mutexscript.tcl,v 11.16 2002/04/29 14:58:16 sandstro Exp $
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#
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# Random mutex tester.
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# Usage: mutexscript dir numiters mlocks sleepint degree
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# dir: dir in which all the mutexes live.
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# numiters: Total number of iterations.
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# nmutex: Total number of mutexes.
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# sleepint: Maximum sleep interval.
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# degree: Maximum number of locks to acquire at once
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source ./include.tcl
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source $test_path/test.tcl
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source $test_path/testutils.tcl
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set usage "mutexscript dir numiters nmutex sleepint degree"
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# Verify usage
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if { $argc != 5 } {
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puts stderr "FAIL:[timestamp] Usage: $usage"
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exit
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}
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# Initialize arguments
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set dir [lindex $argv 0]
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set numiters [ lindex $argv 1 ]
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set nmutex [ lindex $argv 2 ]
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set sleepint [ lindex $argv 3 ]
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set degree [ lindex $argv 4 ]
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set locker [pid]
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set mypid [sanitized_pid]
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# Initialize seed
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global rand_init
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berkdb srand $rand_init
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puts -nonewline "Mutexscript: Beginning execution for $locker:"
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puts " $numiters $nmutex $sleepint $degree"
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flush stdout
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# Open the environment and the mutex
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set e [berkdb_env -create -mode 0644 -lock -home $dir]
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error_check_good evn_open [is_valid_env $e] TRUE
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set mutex [$e mutex 0644 $nmutex]
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error_check_good mutex_init [is_valid_mutex $mutex $e] TRUE
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# Sleep for awhile to make sure that everyone has gotten in
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tclsleep 5
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for { set iter 0 } { $iter < $numiters } { incr iter } {
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set nlocks [berkdb random_int 1 $degree]
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# We will always lock objects in ascending order to avoid
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# deadlocks.
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set lastobj 1
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set mlist {}
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for { set lnum 0 } { $lnum < $nlocks } { incr lnum } {
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# Pick lock parameters
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set obj [berkdb random_int $lastobj [expr $nmutex - 1]]
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set lastobj [expr $obj + 1]
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puts "[timestamp] $locker $lnum: $obj"
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# Do get, set its val to own pid, and then add to list
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error_check_good mutex_get:$obj [$mutex get $obj] 0
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error_check_good mutex_setval:$obj [$mutex setval $obj $mypid] 0
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lappend mlist $obj
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if {$lastobj >= $nmutex} {
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break
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}
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}
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# Sleep for 10 to (100*$sleepint) ms.
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after [berkdb random_int 10 [expr $sleepint * 100]]
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# Now release locks
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foreach i $mlist {
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error_check_good mutex_getval:$i [$mutex getval $i] $mypid
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error_check_good mutex_setval:$i \
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[$mutex setval $i [expr 0 - $mypid]] 0
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error_check_good mutex_release:$i [$mutex release $i] 0
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}
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puts "[timestamp] $locker released mutexes"
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flush stdout
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}
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puts "[timestamp] $locker Complete"
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flush stdout
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