IPC介绍——10个ipcs例子

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
、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           root
0x00000000       root
0x00000000       root
------ Semaphore Arrays --------
key        semid      owner      perms      nsems
0x00000000           root
0x00000000       root
0x000000a7      root
------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages

、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

、列出所有的信号量： -s
[root@test ~]# ipcs -s
------ Semaphore Arrays --------
key        semid      owner      perms      nsems
0x00000000           root
0x00000000       root
0x000000a7      root               

、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           root
0x00000000       root
0x00000000       root                             

、要列出进程更详细信息： -i+pid
[root@test ~]# ipcs -m -i
Shared memory Segment shmid=
uid=   gid=   cuid=  cgid=
mode=       access_perms=
bytes=     lpid=       cpid=       nattch=
att_time=Fri Aug  ::
det_time=Fri Aug  ::
change_time=Fri Aug  :: 

、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 =
max seg size (kbytes) =
max total shared memory (kbytes) =
min seg size (bytes) =
------ Semaphore Limits --------
max number of arrays =
max semaphores per array =
max semaphores system wide =
max ops per semop call =
semaphore max value =
------ Messages: Limits --------
max queues system wide =
max size of message (bytes) =
default max size of queue (bytes) = 

、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
                  root       root       root       root
              root       root       root       root
              root       root       root       root
------ Semaphore Arrays Creators/Owners --------
semid      perms      cuid       cgid       uid        gid
                  root       root       root       root
              root       root       root       root
             root       root       root       root
------ Message Queues: Creators/Owners --------
msqid      perms      cuid       cgid       uid        gid

、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
          root       Aug  ::      Aug  ::      Aug  ::
      root       Aug  ::      Aug  ::      Aug  ::
      root       Aug  ::      Aug  ::      Aug  ::
------ Semaphore Operation/Change Times --------
semid    owner      last-op                    last-changed
        root        Fri Aug  ::    Fri Aug  ::
    root        Fri Aug  ::    Fri Aug  ::
   root        Fri Aug  ::    Fri Aug  ::
------ Message Queues Send/Recv/Change Times --------
msqid    owner      send                 recv                 change

、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
          root
      root
      root              

、列出当前的使用状况： -u
[root@test ~]# ipcs -u
------ Shared Memory Status --------
segments allocated
pages allocated
pages resident
pages swapped
Swap performance:  attempts      successes
------ Semaphore Status --------
used arrays =
allocated semaphores =
------ Messages: Status --------
allocated queues =
used headers =
used space =  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