3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
12 # This file contains tests that attempt to break the pcache module
13 # by bombarding it with simultaneous requests from multiple threads.
15 # $Id: thread003.test,v 1.8 2009/03/26 14:48:07 danielk1977 Exp $
17 set testdir [file dirname $argv0]
19 source $testdir/tester.tcl
20 if {[run_thread_tests]==0} { finish_test ; return }
22 # Set up a couple of different databases full of pseudo-randomly
25 do_test thread003.1.1 {
28 CREATE TABLE t1(a, b, c);
30 for {set ii 0} {$ii < 5000} {incr ii} {
31 execsql {INSERT INTO t1 VALUES($ii, randomblob(200), randomblob(200))}
34 CREATE INDEX i1 ON t1(a, b);
38 do_test thread003.1.2 {
39 expr {([file size test.db] / 1024) > 2000}
41 do_test thread003.1.3 {
46 do_test thread003.1.4 {
49 CREATE TABLE t1(a, b, c);
51 for {set ii 0} {$ii < 5000} {incr ii} {
52 execsql {INSERT INTO t1 VALUES($ii, randomblob(200), randomblob(200))}
55 CREATE INDEX i1 ON t1(a, b);
59 do_test thread003.1.5 {
60 expr {([file size test.db] / 1024) > 2000}
62 do_test thread003.1.6 {
67 # This test opens a connection on each of the large (>2MB) database files
68 # created by the previous block. The connections do not share a cache.
69 # Both "cache_size" parameters are set to 15, so there is a maximum of
70 # 30 pages available globally.
72 # Then, in separate threads, the databases are randomly queried over and
73 # over again. This will force the connections to recycle clean pages from
74 # each other. If there is a thread-safety problem, a segfault or assertion
75 # failure may eventually occur.
78 puts "Starting thread003.2 (should run for ~$nSecond seconds)"
80 foreach zFile {test.db test2.db} {
82 set iEnd [expr {[clock_seconds] + %d}]
83 set ::DB [sqlthread open %s xyzzy]
85 # Set the cache size to 15 pages per cache. 30 available globally.
86 execsql { PRAGMA cache_size = 15 }
88 while {[clock_seconds] < $iEnd} {
89 set iQuery [expr {int(rand()*5000)}]
90 execsql " SELECT * FROM t1 WHERE a = $iQuery "
97 unset -nocomplain finished($zFile)
98 thread_spawn finished($zFile) $thread_procs $SCRIPT
100 foreach zFile {test.db test2.db} {
101 if {![info exists finished($zFile)]} {
102 vwait finished($zFile)
108 # This test is the same as the test above, except that each thread also
109 # writes to the database. This causes pages to be moved back and forth
110 # between the caches internal dirty and clean lists, which is another
111 # opportunity for a thread-related bug to present itself.
114 puts "Starting thread003.3 (should run for ~$nSecond seconds)"
115 do_test thread003.3 {
116 foreach zFile {test.db test2.db} {
118 set iStart [clock_seconds]
119 set iEnd [expr {[clock_seconds] + %d}]
120 set ::DB [sqlthread open %s xyzzy]
122 # Set the cache size to 15 pages per cache. 30 available globally.
123 execsql { PRAGMA cache_size = 15 }
125 while {[clock_seconds] < $iEnd} {
126 set iQuery [expr {int(rand()*5000)}]
127 execsql "SELECT * FROM t1 WHERE a = $iQuery"
128 execsql "UPDATE t1 SET b = randomblob(200)
129 WHERE a < $iQuery AND a > $iQuery + 20
137 unset -nocomplain finished($zFile)
138 thread_spawn finished($zFile) $thread_procs $SCRIPT
140 foreach zFile {test.db test2.db} {
141 if {![info exists finished($zFile)]} {
142 vwait finished($zFile)
148 # In this test case, one thread is continually querying the database.
149 # The other thread does not have a database connection, but calls
150 # sqlite3_release_memory() over and over again.
153 puts "Starting thread003.4 (should run for ~$nSecond seconds)"
154 unset -nocomplain finished(1)
155 unset -nocomplain finished(2)
156 do_test thread003.4 {
157 thread_spawn finished(1) $thread_procs [format {
158 set iEnd [expr {[clock_seconds] + %d}]
159 set ::DB [sqlthread open test.db xyzzy]
161 # Set the cache size to 15 pages per cache. 30 available globally.
162 execsql { PRAGMA cache_size = 15 }
164 while {[clock_seconds] < $iEnd} {
165 set iQuery [expr {int(rand()*5000)}]
166 execsql "SELECT * FROM t1 WHERE a = $iQuery"
172 thread_spawn finished(2) [format {
173 set iEnd [expr {[clock_seconds] + %d}]
175 while {[clock_seconds] < $iEnd} {
176 sqlite3_release_memory 1000
181 if {![info exists finished($ii)]} {
188 set sqlite_open_file_count 0