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Diffstat (limited to 'storage/bdb/test/mutexscript.tcl')
-rw-r--r-- | storage/bdb/test/mutexscript.tcl | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/storage/bdb/test/mutexscript.tcl b/storage/bdb/test/mutexscript.tcl new file mode 100644 index 00000000000..bc410f2716d --- /dev/null +++ b/storage/bdb/test/mutexscript.tcl @@ -0,0 +1,91 @@ +# See the file LICENSE for redistribution information. +# +# Copyright (c) 1996-2002 +# Sleepycat Software. All rights reserved. +# +# $Id: mutexscript.tcl,v 11.16 2002/04/29 14:58:16 sandstro Exp $ +# +# Random mutex tester. +# Usage: mutexscript dir numiters mlocks sleepint degree +# dir: dir in which all the mutexes live. +# numiters: Total number of iterations. +# nmutex: Total number of mutexes. +# sleepint: Maximum sleep interval. +# degree: Maximum number of locks to acquire at once + +source ./include.tcl +source $test_path/test.tcl +source $test_path/testutils.tcl + +set usage "mutexscript dir numiters nmutex sleepint degree" + +# Verify usage +if { $argc != 5 } { + puts stderr "FAIL:[timestamp] Usage: $usage" + exit +} + +# Initialize arguments +set dir [lindex $argv 0] +set numiters [ lindex $argv 1 ] +set nmutex [ lindex $argv 2 ] +set sleepint [ lindex $argv 3 ] +set degree [ lindex $argv 4 ] +set locker [pid] +set mypid [sanitized_pid] + +# Initialize seed +global rand_init +berkdb srand $rand_init + +puts -nonewline "Mutexscript: Beginning execution for $locker:" +puts " $numiters $nmutex $sleepint $degree" +flush stdout + +# Open the environment and the mutex +set e [berkdb_env -create -mode 0644 -lock -home $dir] +error_check_good evn_open [is_valid_env $e] TRUE + +set mutex [$e mutex 0644 $nmutex] +error_check_good mutex_init [is_valid_mutex $mutex $e] TRUE + +# Sleep for awhile to make sure that everyone has gotten in +tclsleep 5 + +for { set iter 0 } { $iter < $numiters } { incr iter } { + set nlocks [berkdb random_int 1 $degree] + # We will always lock objects in ascending order to avoid + # deadlocks. + set lastobj 1 + set mlist {} + for { set lnum 0 } { $lnum < $nlocks } { incr lnum } { + # Pick lock parameters + set obj [berkdb random_int $lastobj [expr $nmutex - 1]] + set lastobj [expr $obj + 1] + puts "[timestamp] $locker $lnum: $obj" + + # Do get, set its val to own pid, and then add to list + error_check_good mutex_get:$obj [$mutex get $obj] 0 + error_check_good mutex_setval:$obj [$mutex setval $obj $mypid] 0 + lappend mlist $obj + if {$lastobj >= $nmutex} { + break + } + } + + # Sleep for 10 to (100*$sleepint) ms. + after [berkdb random_int 10 [expr $sleepint * 100]] + + # Now release locks + foreach i $mlist { + error_check_good mutex_getval:$i [$mutex getval $i] $mypid + error_check_good mutex_setval:$i \ + [$mutex setval $i [expr 0 - $mypid]] 0 + error_check_good mutex_release:$i [$mutex release $i] 0 + } + puts "[timestamp] $locker released mutexes" + flush stdout +} + +puts "[timestamp] $locker Complete" +flush stdout |