[20190402]关于semtimedop函数调用2.txt --//前几天做了sql语句在mutexes上的探究.今天看看_mutex_wait_time设置很大的情况下是否semtimedop会唤醒. 1.环境: SYS@book> @ hide mutex NAME DESCRIPTION DEFAULT_VALUE SESSION_VALUE SYSTEM_VALUE ------------------- ------------------ ------------- ------------- ------------ _mutex_spin_count Mutex spin count TRUE 255 255 _mutex_wait_scheme Mutex wait scheme TRUE 2 2 _mutex_wait_time Mutex wait time TRUE 1 1 --//注:_mutex_wait_time=1,相当1厘秒. SCOTT@book> @ ver1 PORT_STRING VERSION BANNER ------------------------------ -------------- -------------------------------------------------------------------------------- x86_64/Linux 2.4.xx 11.2.0.4.0 Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production $ cat m2.txt set verify off column a noprint new_value v_a; --select mod ( &&3 ,3) a from dual ; --alter session set optimizer_index_cost_adj= &&3; host sleep $(echo &&3/50| bc -l ) insert into job_times values ( sys_context ('userenv', 'sid') ,dbms_utility.get_time ,'&&2') ; commit ; declare v_id number; v_d date; begin for i in 1 .. &&1 loop --select 1 into v_id from dual ; --select sysdate into v_d from dual ; select deptno into v_id from dept where deptno=10; end loop; end ; / update job_times set time_ela = dbms_utility.get_time - time_ela where sid=sys_context ('userenv', 'sid') and method='&&2'; commit; --quit $ seq 150 | xargs -I {} -P 150 bash -c "sqlplus -s -l scott/book @m2.txt 1e6 f2_150 {} >/dev/null" SYS@book> @ mutexy 6 a31kd5tkdvvmm HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 5256 600010918 kksfbc [KKSCHLPIN1] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 --//MUTEX_ADDR=000000007C88E330. 2.测试: --//session 1: SCOTT@book> @ spid SID SERIAL# PROCESS SERVER SPID PID P_SERIAL# C50 ---------- ---------- ------------------------ --------- ------ ------- ---------- -------------------------------------------------- 295 5 65222 DEDICATED 65223 21 3 alter system kill session '295,5' immediate; --//session 2: SYS@book> alter system set "_mutex_wait_scheme"=2 scope=memory; System altered. SYS@book> alter system set "_mutex_wait_time"=100000; alter system set "_mutex_wait_time"=100000 * ERROR at line 1: ORA-00068: invalid value 100000 for parameter _mutex_wait_time, must be between 0 and 65535 --//在0-65536之间. SYS@book> alter system set "_mutex_wait_time"=1000; System altered. --//相当于10秒. --//session 2: SYS@book> oradebug setmypid Statement processed. SYS@book> oradebug peek 0x000000007C88E330 8 [07C88E330, 07C88E338) = 00000000 00000000 SYS@book> oradebug poke 0x000000007C88E330 8 0x0000000200000127 BEFORE: [07C88E330, 07C88E338) = 00000000 00000000 AFTER: [07C88E330, 07C88E338) = 00000127 00000002 --//session 1: SCOTT@book> @ m2.txt 1 c1 0 1 row created. Commit complete. --//挂起!! 3.监测: $ strace -frT -p 65223 .... 4.001032 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000065> 0.000156 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000022> 0.000122 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000687> 3.000815 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.001003> 3.001148 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.000630> 4.000734 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000064> 0.000156 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000022> 0.000122 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000950> 3.001082 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000722> 3.000865 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.000592> 4.000697 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000061> 0.000152 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000022> 0.000121 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000734> 3.000862 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.001028> 3.001176 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.000716> --//可以看出非常像dbms_lock.sleep调用,被拆分3,3,4秒分别执行. --//但是我并没有看解除阻塞后唤醒的情况,我测试多次. SYS@book> oradebug poke 0x000000007C88E330 8 0x0000000200000127 BEFORE: [07C88E330, 07C88E338) = 00000000 00000000 AFTER: [07C88E330, 07C88E338) = 00000127 00000002 ----------------------------------- 4.000819 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000062> 0.000153 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000022> 0.000124 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000019> 0.000087 times({tms_utime=52174, tms_stime=5472, tms_cutime=0, tms_cstime=0}) = 10874034811 <0.000019> 0.000076 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000020> 0.000097 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000017> 0.000087 getrusage(RUSAGE_SELF, {ru_utime={521, 748682}, ru_stime={54, 729679}, ...}) = 0 <0.000020> 0.000134 getrusage(RUSAGE_SELF, {ru_utime={521, 749681}, ru_stime={54, 729679}, ...}) = 0 <0.000020> --//另外我注意一个细节,如果设置_mutex_wait_time>1的情况下,就会出现指数回退的情况,以下是10秒的情况. _mutex_wait_scheme = 0 – Always YIELD _mutex_wait_scheme = 1 & _mutex_wait_time = t – Always SLEEP for t milli-seconds (default) _mutex_wait_scheme = 2 & _mutex_wait_time = t – EXP BACKOFF with maximum sleep --------------------- $ strace -frT -p 65223 -e semtimedop,getrusage Process 65223 attached - interrupt to quit 0.000000 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000036> 0.000250 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000096 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000199 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000018> 0.000155 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000152 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000131 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000201 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000108 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000100 getrusage(RUSAGE_SELF, {ru_utime={521, 774678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000703 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000020> 0.000227 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000018> 0.000109 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000478 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000018> 0.000177 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000106 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000149 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000145 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000155 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000108 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000136 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000104 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000106 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000109 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000342 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000019> 0.000205 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000123 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000017> 0.000106 getrusage(RUSAGE_SELF, {ru_utime={521, 775678}, ru_stime={54, 741678}, ...}) = 0 <0.000016> 0.000968 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000243 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000026> 0.000128 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000173 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000172 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000164 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000023> 0.000160 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000023> 0.000176 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000021> 0.000122 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000117 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000206 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000023> 0.000129 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000021> 0.000160 getrusage(RUSAGE_SELF, {ru_utime={521, 776677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> 0.000309 semtimedop(309952512, 0x7fff28087160, 1, {0, 10000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.010902> 0.011073 semtimedop(309952512, 0x7fff28087160, 1, {0, 10000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.010790> 0.010927 semtimedop(309952512, 0x7fff28087160, 1, {0, 30000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.030891> 0.031029 semtimedop(309952512, 0x7fff28087160, 1, {0, 70000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.070846> 0.070985 semtimedop(309952512, 0x7fff28087160, 1, {0, 120000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.120839> 0.120948 semtimedop(309952512, 0x7fff28087160, 1, {0, 110000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.110910> 0.111058 semtimedop(309952512, 0x7fff28087160, 1, {0, 200000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.200888> 0.201025 semtimedop(309952512, 0x7fff28087160, 1, {0, 150000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.150867> 0.151005 semtimedop(309952512, 0x7fff28087160, 1, {0, 320000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.320891> 0.321029 semtimedop(309952512, 0x7fff28087160, 1, {0, 310000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.310879> --//实际上阻塞的情况下.睡眠的时间间隔开始一直在增加.从1,1,3,7,12,11,20,15,32,31cs增加. 0.311003 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000032> 0.311003 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000032> 0.000157 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000027> 0.000187 semtimedop(309952512, 0x7fff28087160, 1, {0, 640000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.640510> 0.640646 semtimedop(309952512, 0x7fff28087160, 1, {0, 670000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.670902> 0.671039 semtimedop(309952512, 0x7fff28087160, 1, {1, 320000000}) = -1 EAGAIN (Resource temporarily unavailable) <1.320895> --//这里也是 64,67,132 1.321017 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000148 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000026> 0.000152 semtimedop(309952512, 0x7fff28087160, 1, {1, 310000000}) = -1 EAGAIN (Resource temporarily unavailable) <1.310542> --//这里也是 131 ,后面还有. 1.310665 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000145 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000027> 0.000149 semtimedop(309952512, 0x7fff28087160, 1, {2, 600000000}) = -1 EAGAIN (Resource temporarily unavailable) <2.600601> 2.600719 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000131 getrusage(RUSAGE_SELF, {ru_utime={521, 777677}, ru_stime={54, 741678}, ...}) = 0 <0.000027> 0.000149 semtimedop(309952512, 0x7fff28087160, 1, {2, 710000000}) = -1 EAGAIN (Resource temporarily unavailable) <2.710794> 2.710915 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000029> 0.000147 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000025> 0.000156 semtimedop(309952512, 0x7fff28087160, 1, {5, 280000000}) = -1 EAGAIN (Resource temporarily unavailable) <5.280287> 5.280409 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000151 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000026> 0.000151 semtimedop(309952512, 0x7fff28087160, 1, {5, 270000000}) = -1 EAGAIN (Resource temporarily unavailable) <5.270622> --//527cs 5.270746 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000032> 0.000153 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000026> 0.000151 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000675> 3.000791 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000792> 3.000935 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.001177> --//从这里开始等10秒pin 255次. 4.001331 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000027> 0.000151 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000025> 0.000161 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000379> 3.000496 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000744> 3.000882 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.000976> 4.001137 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000029> 0.000157 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000025> 0.000159 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000474> 3.000592 semtimedop(309952512, 0x7fff28087160, 1, {3, 0}) = -1 EAGAIN (Resource temporarily unavailable) <3.000800> 3.000943 semtimedop(309952512, 0x7fff28087160, 1, {4, 0}) = -1 EAGAIN (Resource temporarily unavailable) <4.001361> 4.001510 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000029> 0.000155 getrusage(RUSAGE_SELF, {ru_utime={521, 778677}, ru_stime={54, 741678}, ...}) = 0 <0.000027> 0.000176 getrusage(RUSAGE_SELF, {ru_utime={521, 779677}, ru_stime={54, 741678}, ...}) = 0 <0.000028> 0.000162 getrusage(RUSAGE_SELF, {ru_utime={521, 779677}, ru_stime={54, 741678}, ...}) = 0 <0.000023> 0.000140 getrusage(RUSAGE_SELF, {ru_utime={521, 779677}, ru_stime={54, 741678}, ...}) = 0 <0.000022> --//_mutex_wait_time=2的情况,不是很明显,仅仅执行2次semtimedop sleep 0.01秒的情况. 65223 0.000106 getrusage(RUSAGE_SELF, {ru_utime={522, 312596}, ru_stime={54, 819666}, ...}) = 0 <0.000024> 65223 0.000140 getrusage(RUSAGE_SELF, {ru_utime={522, 312596}, ru_stime={54, 819666}, ...}) = 0 <0.000023> 65223 0.000237 semtimedop(309952512, 0x7fff28087160, 1, {0, 10000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.010283> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 65223 0.010404 semtimedop(309952512, 0x7fff28087160, 1, {0, 10000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.010921> 65223 0.011033 semtimedop(309952512, 0x7fff28087160, 1, {0, 20000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.020893> 65223 0.021011 semtimedop(309952512, 0x7fff28087160, 1, {0, 20000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.020881> 65223 0.020998 semtimedop(309952512, 0x7fff28087160, 1, {0, 20000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.020877> 65223 0.020993 semtimedop(309952512, 0x7fff28087160, 1, {0, 20000000}) = -1 EAGAIN (Resource temporarily unavailable) <0.020885> --//再来看看sleep记数: $ sqlplus -s -l / as sysdba <<EOF > $(seq 1000| xargs -I {} echo -e "@ mutexy 5 a31kd5tkdvvmm\nhost sleep 10\n") > EOF HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166910 600017934 kksfbc [KKSCHLPIN1] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166942 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166948 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166952 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166954 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166956 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 HASH SUM_SLEEPS SUM_GETS LOCATION MUTEX_TYPE MUTEX_ADDR SQLID KGLNAOWN C100 ---------- ---------- ---------- ------------------------------ -------------------- ---------------- ------------- -------- --------------------------------------- 1692266099 161166958 600047254 kkslce [KKSCHLPIN2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2263154 4.6431E+10 kksLockDelete [KKSCHLPIN6] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 2183544 4.4733E+10 kksfbc [KKSCHLFSP2] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 1692266099 6 45955498 kksHeapReadUnlock [KKSCHLRDUP] Cursor Pin 000000007C88E330 a31kd5tkdvvmm SELECT DEPTNO FROM DEPT WHERE DEPTNO=10 --//sleep计数与getrusage调用有关,后面增加都是2次.
[20190402]关于semtimedop函数调用2.txt
来源：这里教程网
时间：2026-03-03 13:15:04
作者：
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