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sqlite/test/walthread.test
dan b8fff29c68 In SQLITE_ENABLE_BATCH_ATOMIC_WRITE builds on F2FS file-systems, invoke 
SQLITE_FCNTL_ROLLBACK_ATOMIC_WRITE if an SQLITE_FCNTL_COMMIT_ATOMIC_WRITE call
fails. Also, do not use an atomic transaction to create the initial database.
This is because if an error occurs while writing to the db file, any changes
to the file-size do not seem to be rolled back automatically. The only time
this matters is when the file was 0 bytes in size to start with.

FossilOrigin-Name: b3122db1545aeb48b7c28d480534b4b0fe04e83d5336225714c3cad926e5960e
2018-01-23 14:01:51 +00:00

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# 2010 April 13
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing the operation of the library in
# "PRAGMA journal_mode=WAL" mode with multiple threads.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
source $testdir/lock_common.tcl
if {[run_thread_tests]==0} { finish_test ; return }
ifcapable !wal { finish_test ; return }
set sqlite_walsummary_mmap_incr 64
# How long, in seconds, to run each test for. If a test is set to run for
# 0 seconds, it is omitted entirely.
#
unset -nocomplain seconds
set seconds(walthread-1) 20
set seconds(walthread-2) 20
set seconds(walthread-3) 20
set seconds(walthread-4) 20
set seconds(walthread-5) 1
# The parameter is the name of a variable in the callers context. The
# variable may or may not exist when this command is invoked.
#
# If the variable does exist, its value is returned. Otherwise, this
# command uses [vwait] to wait until it is set, then returns the value.
# In other words, this is a version of the [set VARNAME] command that
# blocks until a variable exists.
#
proc wait_for_var {varname} {
if {0==[uplevel [list info exists $varname]]} {
uplevel [list vwait $varname]
}
uplevel [list set $varname]
}
# The argument is the name of a list variable in the callers context. The
# first element of the list is removed and returned. For example:
#
# set L {a b c}
# set x [lshift L]
# assert { $x == "a" && $L == "b c" }
#
proc lshift {lvar} {
upvar $lvar L
set ret [lindex $L 0]
set L [lrange $L 1 end]
return $ret
}
#-------------------------------------------------------------------------
# do_thread_test TESTNAME OPTIONS...
#
# where OPTIONS are:
#
# -seconds SECONDS How many seconds to run the test for
# -init SCRIPT Script to run before test.
# -thread NAME COUNT SCRIPT Scripts to run in threads (or processes).
# -processes BOOLEAN True to use processes instead of threads.
# -check SCRIPT Script to run after test.
#
proc do_thread_test {args} {
set A $args
set P(testname) [lshift A]
set P(seconds) 5
set P(init) ""
set P(threads) [list]
set P(processes) 0
set P(check) {
set ic [db eval "PRAGMA integrity_check"]
if {$ic != "ok"} { error $ic }
}
unset -nocomplain ::done
while {[llength $A]>0} {
set a [lshift A]
switch -glob -- $a {
-seconds {
set P(seconds) [lshift A]
}
-init {
set P(init) [lshift A]
}
-processes {
set P(processes) [lshift A]
}
-check {
set P(check) [lshift A]
}
-thread {
set name [lshift A]
set count [lshift A]
set prg [lshift A]
lappend P(threads) [list $name $count $prg]
}
default {
error "Unknown option: $a"
}
}
}
if {$P(seconds) == 0} {
puts "Skipping $P(testname)"
return
}
puts "Running $P(testname) for $P(seconds) seconds..."
catch { db close }
forcedelete test.db test.db-journal test.db-wal
sqlite3 db test.db
eval $P(init)
catch { db close }
foreach T $P(threads) {
set name [lindex $T 0]
set count [lindex $T 1]
set prg [lindex $T 2]
for {set i 1} {$i <= $count} {incr i} {
set vars "
set E(pid) $i
set E(nthread) $count
set E(seconds) $P(seconds)
"
set program [string map [list %TEST% $prg %VARS% $vars] {
%VARS%
proc usleep {ms} {
set ::usleep 0
after $ms {set ::usleep 1}
vwait ::usleep
}
proc integrity_check {{db db}} {
set ic [$db eval {PRAGMA integrity_check}]
if {$ic != "ok"} {error $ic}
}
proc busyhandler {n} { usleep 10 ; return 0 }
sqlite3 db test.db
db busy busyhandler
db eval { SELECT randomblob($E(pid)*5) }
set ::finished 0
after [expr $E(seconds) * 1000] {set ::finished 1}
proc tt_continue {} { update ; expr ($::finished==0) }
set rc [catch { %TEST% } msg]
catch { db close }
list $rc $msg
}]
if {$P(processes)==0} {
sqlthread spawn ::done($name,$i) $program
} else {
testfixture_nb ::done($name,$i) $program
}
}
}
set report " Results:"
foreach T $P(threads) {
set name [lindex $T 0]
set count [lindex $T 1]
set prg [lindex $T 2]
set reslist [list]
for {set i 1} {$i <= $count} {incr i} {
set res [wait_for_var ::done($name,$i)]
lappend reslist [lindex $res 1]
do_test $P(testname).$name.$i [list lindex $res 0] 0
}
append report " $name $reslist"
}
puts $report
sqlite3 db test.db
set res ""
if {[catch $P(check) msg]} { set res $msg }
do_test $P(testname).check [list set {} $res] ""
}
# A wrapper around [do_thread_test] which runs the specified test twice.
# Once using processes, once using threads. This command takes the same
# arguments as [do_thread_test], except specifying the -processes switch
# is illegal.
#
proc do_thread_test2 {args} {
set name [lindex $args 0]
if {[lsearch $args -processes]>=0} { error "bad option: -processes"}
uplevel [lreplace $args 0 0 do_thread_test "$name-threads" -processes 0]
uplevel [lreplace $args 0 0 do_thread_test "$name-processes" -processes 1]
}
#--------------------------------------------------------------------------
# Start 10 threads. Each thread performs both read and write
# transactions. Each read transaction consists of:
#
# 1) Reading the md5sum of all but the last table row,
# 2) Running integrity check.
# 3) Reading the value stored in the last table row,
# 4) Check that the values read in steps 1 and 3 are the same, and that
# the md5sum of all but the last table row has not changed.
#
# Each write transaction consists of:
#
# 1) Modifying the contents of t1 (inserting, updating, deleting rows).
# 2) Appending a new row to the table containing the md5sum() of all
# rows in the table.
#
# Each of the N threads runs N read transactions followed by a single write
# transaction in a loop as fast as possible.
#
# There is also a single checkpointer thread. It runs the following loop:
#
# 1) Execute "PRAGMA wal_checkpoint"
# 2) Sleep for 500 ms.
#
do_thread_test2 walthread-1 -seconds $seconds(walthread-1) -init {
execsql {
PRAGMA journal_mode = WAL;
CREATE TABLE t1(x PRIMARY KEY);
PRAGMA lock_status;
INSERT INTO t1 VALUES(randomblob(100));
INSERT INTO t1 VALUES(randomblob(100));
INSERT INTO t1 SELECT md5sum(x) FROM t1;
}
} -thread main 10 {
proc read_transaction {} {
set results [db eval {
BEGIN;
PRAGMA integrity_check;
SELECT md5sum(x) FROM t1 WHERE rowid != (SELECT max(rowid) FROM t1);
SELECT x FROM t1 WHERE rowid = (SELECT max(rowid) FROM t1);
SELECT md5sum(x) FROM t1 WHERE rowid != (SELECT max(rowid) FROM t1);
COMMIT;
}]
if {[llength $results]!=4
|| [lindex $results 0] != "ok"
|| [lindex $results 1] != [lindex $results 2]
|| [lindex $results 2] != [lindex $results 3]
} {
error "Failed read transaction: $results"
}
}
proc write_transaction {} {
db eval {
BEGIN;
INSERT INTO t1 VALUES(randomblob(101 + $::E(pid)));
INSERT INTO t1 VALUES(randomblob(101 + $::E(pid)));
INSERT INTO t1 SELECT md5sum(x) FROM t1;
COMMIT;
}
}
# Turn off auto-checkpoint. Otherwise, an auto-checkpoint run by a
# writer may cause the dedicated checkpoint thread to return an
# SQLITE_BUSY error.
#
db eval { PRAGMA wal_autocheckpoint = 0 }
set nRun 0
while {[tt_continue]} {
read_transaction
write_transaction
incr nRun
}
set nRun
} -thread ckpt 1 {
set nRun 0
while {[tt_continue]} {
db eval "PRAGMA wal_checkpoint"
usleep 500
incr nRun
}
set nRun
}
#--------------------------------------------------------------------------
# This test has clients run the following procedure as fast as possible
# in a loop:
#
# 1. Open a database handle.
# 2. Execute a read-only transaction on the db.
# 3. Do "PRAGMA journal_mode = XXX", where XXX is one of WAL or DELETE.
# Ignore any SQLITE_BUSY error.
# 4. Execute a write transaction to insert a row into the db.
# 5. Run "PRAGMA integrity_check"
#
# At present, there are 4 clients in total. 2 do "journal_mode = WAL", and
# two do "journal_mode = DELETE".
#
# Each client returns a string of the form "W w, R r", where W is the
# number of write-transactions performed using a WAL journal, and D is
# the number of write-transactions performed using a rollback journal.
# For example, "192 w, 185 r".
#
if {[atomic_batch_write test.db]==0} {
do_thread_test2 walthread-2 -seconds $seconds(walthread-2) -init {
execsql { CREATE TABLE t1(x INTEGER PRIMARY KEY, y UNIQUE) }
} -thread RB 2 {
db close
set nRun 0
set nDel 0
while {[tt_continue]} {
sqlite3 db test.db
db busy busyhandler
db eval { SELECT * FROM sqlite_master }
catch { db eval { PRAGMA journal_mode = DELETE } }
db eval {
BEGIN;
INSERT INTO t1 VALUES(NULL, randomblob(100+$E(pid)));
}
incr nRun 1
incr nDel [file exists test.db-journal]
if {[file exists test.db-journal] + [file exists test.db-wal] != 1} {
error "File-system looks bad..."
}
db eval COMMIT
integrity_check
db close
}
list $nRun $nDel
set {} "[expr $nRun-$nDel] w, $nDel r"
} -thread WAL 2 {
db close
set nRun 0
set nDel 0
while {[tt_continue]} {
sqlite3 db test.db
db busy busyhandler
db eval { SELECT * FROM sqlite_master }
catch { db eval { PRAGMA journal_mode = WAL } }
db eval {
BEGIN;
INSERT INTO t1 VALUES(NULL, randomblob(110+$E(pid)));
}
incr nRun 1
incr nDel [file exists test.db-journal]
if {[file exists test.db-journal] + [file exists test.db-wal] != 1} {
error "File-system looks bad..."
}
db eval COMMIT
integrity_check
db close
}
set {} "[expr $nRun-$nDel] w, $nDel r"
}
}
do_thread_test walthread-3 -seconds $seconds(walthread-3) -init {
execsql {
PRAGMA journal_mode = WAL;
CREATE TABLE t1(cnt PRIMARY KEY, sum1, sum2);
CREATE INDEX i1 ON t1(sum1);
CREATE INDEX i2 ON t1(sum2);
INSERT INTO t1 VALUES(0, 0, 0);
}
} -thread t 10 {
set nextwrite $E(pid)
proc wal_hook {zDb nEntry} {
if {$nEntry>10} {
set rc [catch { db eval {PRAGMA wal_checkpoint} } msg]
if {$rc && $msg != "database is locked"} { error $msg }
}
return 0
}
db wal_hook wal_hook
while {[tt_continue]} {
set max 0
while { $max != ($nextwrite-1) && [tt_continue] } {
set max [db eval { SELECT max(cnt) FROM t1 }]
}
if {[tt_continue]} {
set sum1 [db eval { SELECT sum(cnt) FROM t1 }]
set sum2 [db eval { SELECT sum(sum1) FROM t1 }]
db eval { INSERT INTO t1 VALUES($nextwrite, $sum1, $sum2) }
incr nextwrite $E(nthread)
integrity_check
}
}
set {} ok
} -check {
puts " Final db contains [db eval {SELECT count(*) FROM t1}] rows"
puts " Final integrity-check says: [db eval {PRAGMA integrity_check}]"
# Check that the contents of the database are Ok.
set c 0
set s1 0
set s2 0
db eval { SELECT cnt, sum1, sum2 FROM t1 ORDER BY cnt } {
if {$c != $cnt || $s1 != $sum1 || $s2 != $sum2} {
error "database content is invalid"
}
incr s2 $s1
incr s1 $c
incr c 1
}
}
do_thread_test2 walthread-4 -seconds $seconds(walthread-4) -init {
execsql {
PRAGMA journal_mode = WAL;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b UNIQUE);
}
} -thread r 1 {
# This connection only ever reads the database. Therefore the
# busy-handler is not required. Disable it to check that this is true.
#
# UPDATE: That is no longer entirely true - as we don't use a blocking
# lock to enter RECOVER state. Which means there is a small chance a
# reader can see an SQLITE_BUSY.
#
while {[tt_continue]} {
integrity_check
}
set {} ok
} -thread w 1 {
proc wal_hook {zDb nEntry} {
if {$nEntry>15} {db eval {PRAGMA wal_checkpoint}}
return 0
}
db wal_hook wal_hook
set row 1
while {[tt_continue]} {
db eval { REPLACE INTO t1 VALUES($row, randomblob(300)) }
incr row
if {$row == 10} { set row 1 }
}
set {} ok
}
# This test case attempts to provoke a deadlock condition that existed in
# the unix VFS at one point. The problem occurred only while recovering a
# very large wal file (one that requires a wal-index larger than the
# initial default allocation of 64KB).
#
do_thread_test walthread-5 -seconds $seconds(walthread-5) -init {
proc log_file_size {nFrame pgsz} {
expr {12 + ($pgsz+16)*$nFrame}
}
execsql {
PRAGMA page_size = 1024;
PRAGMA journal_mode = WAL;
CREATE TABLE t1(x);
BEGIN;
INSERT INTO t1 VALUES(randomblob(900));
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 2 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 4 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 8 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 16 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 32 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 64 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 128 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 256 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 512 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 1024 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 2048 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 4096 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 8192 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 16384 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 32768 */
INSERT INTO t1 SELECT randomblob(900) FROM t1; /* 65536 */
COMMIT;
}
forcecopy test.db-wal bak.db-wal
forcecopy test.db bak.db
db close
forcecopy bak.db-wal test.db-wal
forcecopy bak.db test.db
if {[file size test.db-wal] < [log_file_size [expr 64*1024] 1024]} {
error "Somehow failed to create a large log file"
}
puts "Database with large log file recovered. Now running clients..."
} -thread T 5 {
db eval { SELECT count(*) FROM t1 }
}
unset -nocomplain seconds
finish_test
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