IPC介绍——10个ipcs例子 semaphorearrays2010performancesystemaccess ipcs是一个uinx/linux的命令。用于报告系统的消息队列、信号量、共享内存等 1、列出所有的ipcs参数： -a 他是默认选项及ipcs等效于ipcs -a [root@test ~]# ipcs -a ------ Shared Memory Segments -------- key shmid owner perms bytes nattch status 0x00000000 0 root 644 52 2 0x00000000 32769 root 644 16384 2 0x00000000 65538 root 644 268 2 ------ Semaphore Arrays -------- key semid owner perms nsems 0x00000000 0 root 600 1 0x00000000 98305 root 600 1 0x000000a7 131074 root 600 1 ------ Message Queues -------- key msqid owner perms used-bytes messages 2、列出进程中的消息队列： -q 当前范例中为空 [root@test ~]# ipcs -q ------ Message Queues -------- key msqid owner perms used-bytes messages 3、列出所有的信号量： -s [root@test ~]# ipcs -s ------ Semaphore Arrays -------- key semid owner perms nsems 0x00000000 0 root 600 1 0x00000000 98305 root 600 1 0x000000a7 131074 root 600 1 4、列出所有的共享内存信息： -m [root@test ~]# ipcs -m ------ Shared Memory Segments -------- key shmid owner perms bytes nattch status 0x00000000 0 root 644 52 2 0x00000000 32769 root 644 16384 2 0x00000000 65538 root 644 268 2 5、要列出进程更详细信息： -i+pid [root@test ~]# ipcs -m -i 32769 Shared memory Segment shmid=32769 uid=0 gid=0 cuid=0 cgid=0 mode=0644 access_perms=0644 bytes=16384 lpid=1051 cpid=1047 nattch=2 att_time=Fri Aug 13 09:10:30 2010 det_time=Fri Aug 13 09:10:30 2010 change_time=Fri Aug 13 09:10:30 2010 6、列出系统中的限额： -l（列出全部，也可指定要查看的限额） [root@test ~]# ipcs -l ------ Shared Memory Limits -------- max number of segments = 4096 max seg size (kbytes) = 32768 max total shared memory (kbytes) = 8388608 min seg size (bytes) = 1 ------ Semaphore Limits -------- max number of arrays = 128 max semaphores per array = 250 max semaphores system wide = 32000 max ops per semop call = 32 semaphore max value = 32767 ------ Messages: Limits -------- max queues system wide = 998 max size of message (bytes) = 8192 default max size of queue (bytes) = 16384 7、列出创建者以及属主的uid和gid： -c [root@test ~]# ipcs -c ------ Shared Memory Segment Creators/Owners -------- shmid perms cuid cgid uid gid 0 644 root root root root 32769 644 root root root root 65538 644 root root root root ------ Semaphore Arrays Creators/Owners -------- semid perms cuid cgid uid gid 0 600 root root root root 98305 600 root root root root 131074 600 root root root root ------ Message Queues: Creators/Owners -------- msqid perms cuid cgid uid gid 8、列出最后的访问时间： -t [root@test ~]# ipcs -t ------ Shared Memory Attach/Detach/Change Times -------- shmid owner attached detached changed 0 root Aug 13 09:10:30 Aug 13 09:10:30 Aug 13 09:10:30 32769 root Aug 13 09:10:30 Aug 13 09:10:30 Aug 13 09:10:30 65538 root Aug 13 09:10:30 Aug 13 09:10:30 Aug 13 09:10:30 ------ Semaphore Operation/Change Times -------- semid owner last-op last-changed 0 root Fri Aug 13 09:10:19 2010 Fri Aug 13 09:10:16 2010 98305 root Fri Aug 13 09:10:24 2010 Fri Aug 13 09:10:20 2010 131074 root Fri Aug 13 09:10:32 2010 Fri Aug 13 09:10:30 2010 ------ Message Queues Send/Recv/Change Times -------- msqid owner send recv change 9、列出创建者和对应的进程id： -p [root@test ~]# ipcs -p ------ Shared Memory Creator/Last-op -------- shmid owner cpid lpid 0 root 1047 1051 32769 root 1047 1051 65538 root 1047 1051 10、列出当前的使用状况： -u [root@test ~]# ipcs -u ------ Shared Memory Status -------- segments allocated 3 pages allocated 6 pages resident 6 pages swapped 0 Swap performance: 0 attempts 0 successes ------ Semaphore Status -------- used arrays = 3 allocated semaphores = 3 ------ Messages: Status -------- allocated queues = 0 used headers = 0 used space = 0 bytes 转载自：http://blog.csdn.net/i_am_jojo/article/details/7697155 也可参考http://blog.csdn.net/henulwj/article/details/8181957