Import changeset

bdb/test/mutexscript.tcl

@@ -0,0 +1,91 @@
+# See the file LICENSE for redistribution information.
+#
+# Copyright (c) 1996, 1997, 1998, 1999, 2000
+#	Sleepycat Software.  All rights reserved.
+#
+#	$Id: mutexscript.tcl,v 11.12 2000/11/21 22:14:56 dda 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
+		}
+	}
+
+	# Pick sleep interval
+	tclsleep [ berkdb random_int 1 $sleepint ]
+
+	# 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