perfschema/t/func_mutex.test

##
## WL#4818, 4.1.3 MUTEXES, RW-LOCKS, ...
##
## Functional testing of mutexes and RW-locks
##

--source include/not_embedded.inc
--source include/have_perfschema.inc

UPDATE performance_schema.setup_instruments SET enabled = 'NO', timed = 'YES';

UPDATE performance_schema.setup_instruments SET enabled = 'YES'
WHERE name LIKE 'wait/synch/mutex/%'
   OR name LIKE 'wait/synch/rwlock/%';

# reset lost counters
truncate table performance_schema.events_statements_summary_by_digest;
flush status;

# Make sure objects are instrumented
select NAME from performance_schema.mutex_instances
  where NAME = 'wait/synch/mutex/sql/LOCK_open';
select NAME from performance_schema.rwlock_instances
  where NAME = 'wait/synch/rwlock/sql/LOCK_grant' limit 1;

--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings

#
# TODO: Change to InnoDB when it gets instrumentation
#

CREATE TABLE t1 (id INT PRIMARY KEY, b CHAR(100) DEFAULT 'initial value')
ENGINE=MyISAM;

INSERT INTO t1 (id) VALUES (1), (2), (3), (4), (5), (6), (7), (8);

#
# FM1: Count for mutex should increase with instrumentation enabled and
# FM2: Count for mutex should not increase with instrumentation disabled
#

TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;

SELECT * FROM t1 WHERE id = 1;

SET @before_count = (SELECT SUM(TIMER_WAIT)
                     FROM performance_schema.events_waits_history_long
                     WHERE (EVENT_NAME = 'wait/synch/mutex/sql/LOCK_table_cache'));

SELECT * FROM t1;

SET @after_count = (SELECT SUM(TIMER_WAIT)
                    FROM performance_schema.events_waits_history_long
                    WHERE (EVENT_NAME = 'wait/synch/mutex/sql/LOCK_table_cache'));

SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_fm1_timed;

UPDATE performance_schema.setup_instruments SET enabled = 'NO'
WHERE NAME = 'wait/synch/mutex/sql/LOCK_table_cache';

TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;

SELECT * FROM t1 WHERE id = 1;

SET @before_count = (SELECT SUM(TIMER_WAIT)
                     FROM performance_schema.events_waits_history_long
                     WHERE (EVENT_NAME = 'wait/synch/mutex/sql/LOCK_table_cache'));

SELECT * FROM t1;

SET @after_count = (SELECT SUM(TIMER_WAIT)
                    FROM performance_schema.events_waits_history_long
                    WHERE (EVENT_NAME = 'wait/synch/mutex/sql/LOCK_table_cache'));

SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_fm2_timed;

#
# Repeat for RW-lock
#

TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;

SELECT * FROM t1 WHERE id = 1;

SET @before_count = (SELECT SUM(TIMER_WAIT)
                     FROM performance_schema.events_waits_history_long
                     WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));

SELECT * FROM t1;

SET @after_count = (SELECT SUM(TIMER_WAIT)
                    FROM performance_schema.events_waits_history_long
                    WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));

SELECT IF((@after_count - @before_count) > 0, 'Success', 'Failure') test_fm1_rw_timed;

UPDATE performance_schema.setup_instruments SET enabled = 'NO'
WHERE NAME = 'wait/synch/rwlock/sql/LOCK_grant';

TRUNCATE TABLE performance_schema.events_waits_history_long;
TRUNCATE TABLE performance_schema.events_waits_history;
TRUNCATE TABLE performance_schema.events_waits_current;

SELECT * FROM t1 WHERE id = 1;

SET @before_count = (SELECT SUM(TIMER_WAIT)
                     FROM performance_schema.events_waits_history_long
                     WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));

SELECT * FROM t1;

SET @after_count = (SELECT SUM(TIMER_WAIT)
                    FROM performance_schema.events_waits_history_long
                    WHERE (EVENT_NAME = 'wait/synch/rwlock/sql/LOCK_grant'));

SELECT IF((COALESCE(@after_count, 0) - COALESCE(@before_count, 0)) = 0, 'Success', 'Failure') test_fm2_rw_timed;

# Clean-up.
UPDATE performance_schema.setup_instruments SET enabled = 'YES';
DROP TABLE t1;

UPDATE performance_schema.setup_instruments SET enabled = 'YES', timed = 'YES';

# In case of failure, will indicate the root cause
show global status like "performance_schema%";