ps aux %MEM %CPU累积加起的百分比和TOP的不一致

lengyuzlg

为什么
ps aux  %MEM累积加起来是80，可是实际使用了50

wtuter

回复 1# lengyuzlg


    你怎么算的

shahand

多出来的那30%是shared memory。

pmap能看到的。

lengyuzlg

回复 2# wtuter


ps aux 累积相加第3列%CPU的值为1.6 top看CPU的使用率为0.5

lengyuzlg

回复 3# shahand


    cpu的呢

shahand

Shared Memory
One of the simplest interprocess communication methods is using shared memory.
Shared memory allows two or more processes to access the same memory as if they all
called malloc and were returned pointers to the same actual memory.When one
process changes the memory, all the other processes see the modification.

lkk2003rty

回复 6# shahand


   这段话从哪出来的？