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08 Dec 07

linux下/proc/stat字段含义

blog.sina.com.cn/...print_5546a5ad010007mq.html - Preview

_proc_stat cpu linux proc process stat

linux下/proc/stat字段含义

http://blog.sina.com.cn 2007年03月01日15:24 Jacking

标签：

     user
system
nice
idle
iowait
irq    softirq

cpu 17906755 86377
53312329 1322524322 29311124 101704 1096939

cpu0 4665564 22883 13417357
330376020 7206071
99986 297154

cpu1 4488897 20352 13351971
330749128 7202582
0
271926

cpu2 4434851 22675 13302518
330622140 7455115
1718   245786

cpu3 4317443 20467 13240483
330777034 7447356
0
282073

第一行是总的情况

第二行到第五行分别代表每个cpu的情况

对这个文件需要读取两遍，我们用total表示累计总资源，那么user+sys就是我们想要知道的累计CPU占用的资源。每个变量后面的数字表示它是第几次读文件得到的，用如下方法可算出CPU占用率：

Total_1=user_1+nice_1+sys_1+idle_1

Total_2=user_2+nice_2+sys_2+idle_2

Rate={[(user_2+sys_2)-(user_1+sys_1)]/（total_2-total_1）}*100

由于我们两次读取的时间间隔比较短，我们就近似的认为这就是即时的CPU利用率。

page 141921816 270618577


The number of pages the system paged in
and the number

        that
were paged out (from disk).

进页面总数；出页面总数；

swap 162653 773227


The number of
swap pages that have been brought in and


out.

换入总数；换出总数

intr 554351143 356079077 38 0 11 11 0 5 3 1 0 0 0 146 0 2 0 0 0 0 0
145348702 4632843 0 0 48290304 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0


The number of interrupts received from the system boot.

中断总量

disk_io:
(8,0):(48399919,26423829,283842508,21976090,541237126)


(major,minor):(noinfo,
read_io_ops,
blks_read,


write_io_ops, blks_written)

单个磁盘I/O总数；单个磁盘I/O读；单个磁盘块读；单个磁盘I/O写；单个磁盘块写

ctxt 3551861649


The number of context switches that the system underwent.

上下文切换数量

btime 1169169423


boot time, in seconds since the epoch (January 1,
1970).

引导时间

processes 1547141


Number of forks since boot.

进程总数

procs_running 1

procs_blocked 0