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

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