mysql5.5.5-m3,show innodb status output confuse me (1 reply)

I use sysbench to test performance of mysql5.5.5-m3.

=====================================
100901 10:30:13 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 20 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 121 1_second, 9 sleeps, 1 10_second, 112 background, 81 flush
srv_master_thread log flush and writes: 951
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 735022, signal count 658586
--Thread 1084389696 has waited at /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c li
ne 511 for 0.00 seconds the semaphore:
S-lock on RW-latch at 0x2aab40009d18 created in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innoba
se/dict/dict0dict.c line 1634
a writer (thread id 1418033472) has reserved it in mode exclusive
number of readers 0, waiters flag 1, lock_word: 0
Last time read locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line 5
11
Last time write locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line
504
--Thread 1415825728 has waited at /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c li
ne 511 for 1.00 seconds the semaphore:
S-lock on RW-latch at 0x2aab40009d18 created in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innoba
se/dict/dict0dict.c line 1634
a writer (thread id 1418033472) has reserved it in mode exclusive
number of readers 0, waiters flag 1, lock_word: 0
Last time read locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line 5
11
Last time write locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line
504
--Thread 1413015872 has waited at /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c li
ne 511 for 1.00 seconds the semaphore:
S-lock on RW-latch at 0x2aab40009d18 created in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innoba
se/dict/dict0dict.c line 1634
a writer (thread id 1418033472) has reserved it in mode exclusive
number of readers 0, waiters flag 1, lock_word: 0
Last time read locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line 5
11
Last time write locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line
504
--Thread 1410406720 has waited at /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c li
ne 511 for 1.00 seconds the semaphore:
S-lock on RW-latch at 0x2aab40009d18 created in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innoba
se/dict/dict0dict.c line 1634
a writer (thread id 1418033472) has reserved it in mode exclusive
number of readers 0, waiters flag 1, lock_word: 0
Last time read locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line 5
11
Last time write locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line
504
--Thread 1418836288 has waited at /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c li
ne 511 for 1.00 seconds the semaphore:
S-lock on RW-latch at 0x2aab40009d18 created in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innoba
se/dict/dict0dict.c line 1634
a writer (thread id 1418033472) has reserved it in mode exclusive
number of readers 0, waiters flag 1, lock_word: 0
Last time read locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line 5
11
Last time write locked in file /export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c line
504
--Thread 1406794048 has waited at /e46144 starting index read
mysql tables in use 1, locked 0
, holds adaptive hash latch
MySQL thread id 95, query id 15725735 10.11.36.21 sbtest statistics
SELECT c from testib50m where id=19963630
Trx read view will not see trx with id >= 94B9DE, sees < 94B78C
---TRANSACTION 94B9DC, ACTIVE 0 sec, process no 8387, OS thread id 1419438400 starting index read
mysql tables in use 1, locked 0
MySQL thread id 84, query id 15725674 10.11.36.21 sbtest statistics
SELECT c from testib50m where id=24450147
---TRANSACTION 94B9D7, ACTIVE 0 sec, process no 8387, OS thread id 1422649664 starting index read
mysql tables in use 1, locked 0
, holds adaptive hash latch
MySQL thread id 100, query id 15725684 10.11.36.21 sbtest statistics
...........

My os is :
Linux ssohudwa.no.sohu.com 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

the upper output:
/export/home/pb2/build/sb_0-2019843-1278441754.69/mysql-5.5.5-m3/storage/innobase/btr/btr0cur.c

There isn't /export/home/.... directory in my system.